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Zenit-4

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Zenit 4 Zenit-4. Later improved version Zenit-4 commonly had a Nauka module mounted on the forward end of the sphere.

AKA: 11F69;4K;Vostok 4. Status: Operational 1963. First Launch: 1963-11-16. Last Launch: 1970-08-07. Number: 76 . Gross mass: 6,300 kg (13,800 lb).

The Zenit-4 draft project was completed in 1964. The high resolution system used a 3 m focal length camera. Development was done by Kozlov at OKB-1 Filial 3. Chertok and Tsybin were in charge of the flight tests. Zenit-4 was equipped with the Ftor-4 camera and was accepted into service in 1965. Typical orbital profile: inclination 65 degrees with altitude of 202-320 km; inclination 51.8 degrees with altitude of 199-286 km; inclination 72.8 degrees with altitude of 204-331 km; inclination 81.3 degrees with altitude of 201-368 km. Designed duration: 8 days. Transmission frequencies observed in West: 19.995 PDM; sometimes; 19.990 PDM.

Photo Gallery

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Zenit-4MT Credit: Manufacturer Image

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• Vostok spacecraft and Zenit spy satellite authorised. - . Nation: Russia. Related Persons: Korolev. Spacecraft Bus: Vostok. Spacecraft: Vostok, Zenit-2 satellite, Zenit-4.

  Council of Chief Designers Decree 'On course of work on the piloted spaceship' was issued. Council of Chief designers approved the Vostok manned space program, in combination with Zenit spy satellite program Korolev was authorised to proceed with development of a spacecraft to achieve manned flights at the earliest possible date. However the design would be such that the same spacecraft could be used to fulfil the military's unmanned photo reconnaissance satellite requirement. The military resisted, but Korolev won. This was formalised in a decree of 25 May 1959.

• Vostok / Zenit-3 decree issued. - . Nation: Russia. Spacecraft Bus: Vostok. Spacecraft: Vostok, Zenit-2 satellite, Zenit-4.

  Due to a bitter fight with the military over the nature and priority of the manned spacecraft and photo-reconnaissance space programs, the final decree for the Vostok manned spacecraft was delayed until seven months after drawing release began. This authorised production of a single design that could be used either as a manned spacecraft or as a military reconnaissance satellite. These were the Zenit-2 and Zenit-4 spacecraft based on the Vostok design. This marked the end of the original Zenit configuration.

• Production of Vostok and Zenit-2 authorised. - . Nation: Russia. Spacecraft Bus: Vostok. Spacecraft: Vostok, Zenit-2 satellite, Zenit-4.

  Central Committee of the Communist Party and Council of Soviet Ministers Decree 569-264 'On work on a reconnaissance satellite and piloted spaceship' was issued. Due to a bitter fight with the military over the nature and priority of the manned spacecraft and photo-reconnaissance space programs, the final decree for the Vostok manned spacecraft was delayed until seven months after drawing release began. This authorised production of a single design that could be used either as a manned spacecraft or as a military reconnaissance satellite. These were the Zenit-2 and Zenit-4 spacecraft based on the Vostok design. This marked the end of the original Zenit configuration. The military had to develop the recovery forces and techniques for both spacecraft, including appropriate aircraft, helicopters, and handling equipment. At that time it was felt that there was a 60% chance on each launch of an abort requiring rescue operations for the cosmonaut.

• Zenit project review - . Nation: Russia. Related Persons: Alekseyev, Semyon, Ustinov, Voronin. Program: Vostok. Flight: Vostok 1. Spacecraft: Vostok, Zenit-2 satellite, Zenit-4.

  Ustinov heads a review of the reconnaissance satellite program, at that time still referred to as the Vostok-2 and Vostok-4 spacecraft. Thirty staff are working on it full time at OKB-1, but Korolev says that due to delays in the photographic, television, and radar equipment for the spacecraft the first launch will be delayed two to three months. But he points out that since Vostok-1 has already proven the recovery systems, the first Vostok-2 should still be ready for launch in June-July 1961. Ustinov notes that the Ministry of Defence has had little input or understanding of the specification for the spacecraft. The launch of the first Vostok-3 is delayed to March due to the need to fully test all systems. The life support system (Vornonin) and the ejection seat (Alekseyev) are the pacing items. The next meeting is set for 27 February. Kustanin testifies as to the readiness of the spacecraft and the cosmonauts.

• Korolev requests new Vostoks - . Nation: Russia. Related Persons: Korolev. Program: Vostok. Spacecraft: Vostok, Vostok-Zh, Zenit-4.

  Korolev has issued a letter requested eight new Vostok 3A spacecraft to be built in 1962-1963. He recommends that they should be finished as the 1100 to 1300 kg heavier 'Vostok-2', to be boosted by the 11A57 rocket, developed originally for the Zenit-4 spy satellite. These Vostok-2's will be used for docking experiments, to form EO Experimental Orbital stations, and to develop spacecraft systems for flight to the moon. The VVS fully supports these plans. One of the docking spacecraft will be piloted, the other unpiloted.

• Soviet Space Plans for 1963-1964 - . Nation: Russia. Related Persons: Korolev, Smirnov, Ustinov. Program: Soyuz, Vostok, DS. Flight: Vostok 7, Vostok 8, Vostok 9. Spacecraft: Soyuz A, Soyuz B, Soyuz V, Vostok, Zenit-2 satellite, Zenit-4.

  Meeting of the Interdepartmental Soviet of the Academy of Sciences reviews space exploration plans. In the next two years, 5-6 Luna probes will be sent to the moon, including soft landers with a mass of 100 kg, and orbiters to map the surface. There will be flybys and landings of Mars and Venus. Two Zond spacecraft will study the space environment out to 20 million kilometres from the earth. In earth orbit, 10 Zenit spy satellites, 10 to 12 Vostok manned spacecraft, 4 to 6 Soyuz spacecraft, and 10 to 12 Kosmos satellites will be launched. The Kosmos will fly missions in meteorology, communications, television transmission, and heliographic, and geological studies. Kamanin finds this a good program, but it nearly all relies on a single launch pad and one-time transmission of data from a few satellites. The military plan is not reviewed; it must go through the VPK Military-Industrial Commission first. An Expert Commission is to be formed on the Soyuz spacecraft. Smirnov and Korolev have dictated a letter to Ustinov asking that eight more Vostoks be built. On the other hand, some on the general staff want 60 cosmonauts trained in the next two to three years, to support 8 to 10 flights of single-place spacecraft and 7 to 8 flights of multiplace spacecraft.

• Cosmos 22 - . Payload: Zenit-4 no. 1. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: Korolev bureau. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 6.00 days. Decay Date: 1963-11-22 . USAF Sat Cat: 689 . COSPAR: 1963-045A. Apogee: 376 km (233 mi). Perigee: 193 km (119 mi). Inclination: 64.90 deg. Period: 90.20 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 30 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: Korolev bureau. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1964-05-26 . USAF Sat Cat: 797 . COSPAR: 1964-023A. Apogee: 366 km (227 mi). Perigee: 206 km (128 mi). Inclination: 64.90 deg. Period: 90.30 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 34 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: Korolev bureau. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1964-07-09 . USAF Sat Cat: 822 . COSPAR: 1964-034A. Apogee: 342 km (212 mi). Perigee: 201 km (124 mi). Inclination: 64.90 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule.

• Voskhod preparations - . Nation: Russia. Related Persons: Korolev, Krylov, Rudenko. Program: Voskhod. Flight: Voskhod 1. Spacecraft: Voskhod, Zenit-4.

  Kamanin arrives at the cosmodrome, only to find the launch of the manned Voskhod delayed to October. The launch of a Zenit-4 spy satellite, that uses the same launch vehicle as planned for Voskhod, has aborted on the pad after the Block A strap-on failed to ignite. This is the first block A failure in over 100 R-7 launches. That evening Kamanin views a launch of an R-36 heavy ICBM. Marshall Krylov reveals it will have a range of 14,000 km with a CEP of under 1 km with a 40 megaton warhead - one missile is sufficient to wipe out a city like New York. Rudenko believes that the victor in any nuclear war will be the one who pushes the button first. Krylov disagrees, saying that if the Americans would launch an attack on Soviet missile forces, the Soviet Union would launch its missiles on a counter-strike before the American missiles arrive - total and senseless destruction. Rudenko believes that Rudenko is more correct, since in the real-world responses will not conform to theoretical possibilities of instant reaction.

  Later the state commission meets to consider the launch of the first Voskhod. The unpleasantness at the landing trials in the Crimea reveal only the inadequacy of the design of the test capsules, and do not reflect the flight system, says Korolev. He certifies the reliability of the Voskhod for flight. The commission decides to set the launch of the next Zenit-4 reconnaissance satellite for 14 September; that of the Voskhod with mannequins on 18-20 September; the definitive landing system trial at Fedosiya on 23 September; and if that is successful, launch of a manned Voskhod by the end of September.

• Cosmos 45 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Related Persons: Korolev. Agency: Korolev bureau. Program: Voskhod. Class: Surveillance. Type: Military surveillance satellite. Flight: Voskhod 1. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 5.00 days. Decay Date: 1964-09-18 . USAF Sat Cat: 880 . COSPAR: 1964-055A. Apogee: 311 km (193 mi). Perigee: 203 km (126 mi). Inclination: 64.90 deg. Period: 89.60 min.

  High resolution photo reconnaissance satellite; returned film capsule; also carried weather experiments. The Zenit-4 launches a day ahead of schedule. The booster rocket performs perfectly as Korolev and Kamanin watch from the veranda of the IP-1 tracking station. This confirms readiness of the same launch vehicle for the Voskhod launch.

• Zenit preparations - . Nation: Russia. Related Persons: Tyulin. Program: Voskhod. Flight: Voskhod 2. Spacecraft: Voskhod, Zenit-4.

  Tyulin advises from Baikonur that the Zenit spacecraft has been fitted with sensors to measure the rotation rate of the capsule fitted with the airlock ring during re-entry. It is to be mated to the booster on 5 May, with launch on schedule for 7 May. Korolev wants the cosmonauts to report to the cosmodrome on 7 May.

• Cosmos 59 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-03-15 . USAF Sat Cat: 1191 . COSPAR: 1965-015A. Apogee: 321 km (199 mi). Perigee: 205 km (127 mi). Inclination: 64.90 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule fitted with airlock mating ring planned for Voskhod-2 spacecraft..

• Cosmos 57 lands. - . Nation: Russia. Related Persons: Belyayev, Leonov. Program: Voskhod. Flight: Voskhod 2. Spacecraft: Voskhod, Zenit-4.

  The Zenit-4 fitted with the airlock attachment ring successfully lands at 12:09, 170 km south of Kustanin (and 50 km north of the aim point). Later procedures for emergency landing on the first, second, and third orbits are discussed. The cosmonauts want to discuss the possibility of their taking action if the airlock fails to jettison (even though there are redundant systems to ensure this). Leonov discuses a method of inflating the airlock, his opening the hatch from the spacecraft, checking all connections, then returning to the capsule and attempting again. Data arrives in the evening from the recovered Zenit - the rotation rates are acceptable, Voskhod-2 is clear to launch on 18 March. In the evening the cosmonauts conduct interviews with journalists.

• Cosmos 65 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-04-25 . USAF Sat Cat: 1320 . COSPAR: 1965-029A. Apogee: 315 km (195 mi). Perigee: 207 km (128 mi). Inclination: 65.00 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule; also carried weather experiments..

• Cosmos 67 - . Payload: Zenit-4. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-06-02 . USAF Sat Cat: 1382 . COSPAR: 1965-040A. Apogee: 351 km (218 mi). Perigee: 203 km (126 mi). Inclination: 51.80 deg. Period: 90.10 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 69 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-07-03 . USAF Sat Cat: 1421 . COSPAR: 1965-049A. Apogee: 310 km (190 mi). Perigee: 206 km (128 mi). Inclination: 64.90 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 77 - . Payload: Zenit-4. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-08-11 . USAF Sat Cat: 1469 . COSPAR: 1965-061A. Apogee: 281 km (174 mi). Perigee: 200 km (120 mi). Inclination: 51.80 deg. Period: 89.30 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 79 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-09-02 . USAF Sat Cat: 1523 . COSPAR: 1965-069A. Apogee: 338 km (210 mi). Perigee: 206 km (128 mi). Inclination: 64.90 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 85 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-09-17 . USAF Sat Cat: 1578 . COSPAR: 1965-071A. Apogee: 291 km (180 mi). Perigee: 202 km (125 mi). Inclination: 64.90 deg. Period: 89.50 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 91 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-10-01 . USAF Sat Cat: 1603 . COSPAR: 1965-075A. Apogee: 324 km (201 mi). Perigee: 203 km (126 mi). Inclination: 65.00 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 92 - . Payload: Bion precursor. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-10-24 . USAF Sat Cat: 1626 . COSPAR: 1965-083A. Apogee: 331 km (205 mi). Perigee: 204 km (126 mi). Inclination: 64.90 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule; also carried weather and biological experiments..

• Cosmos 94 - . Payload: Bion precursor. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1965-11-05 . USAF Sat Cat: 1636 . COSPAR: 1965-085A. Apogee: 271 km (168 mi). Perigee: 205 km (127 mi). Inclination: 65.00 deg. Period: 89.20 min. High resolution photo reconnaissance satellite; returned film capsule; also carried biological experiments..

• Cosmos 109 - . Payload: Bion precursor. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-02-27 . USAF Sat Cat: 2019 . COSPAR: 1966-014A. Apogee: 288 km (178 mi). Perigee: 204 km (126 mi). Inclination: 64.90 deg. Period: 89.40 min. High resolution photo reconnaissance satellite; returned film capsule; also carried biological experiments..

• Cosmos 113 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-03-29 . USAF Sat Cat: 2114 . COSPAR: 1966-023A. Apogee: 314 km (195 mi). Perigee: 202 km (125 mi). Inclination: 64.90 deg. Period: 89.60 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 114 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-04-14 . USAF Sat Cat: 2133 . COSPAR: 1966-028A. Apogee: 337 km (209 mi). Perigee: 202 km (125 mi). Inclination: 72.80 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Zenit-4 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: RVSN. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. High resolution photo reconnaissance mission..

• Cosmos 121 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-06-25 . USAF Sat Cat: 2210 . COSPAR: 1966-054A. Apogee: 327 km (203 mi). Perigee: 205 km (127 mi). Inclination: 72.80 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 126 - . Payload: Zenit-4. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 9.00 days. Decay Date: 1966-08-06 . USAF Sat Cat: 2368 . COSPAR: 1966-068A. Apogee: 343 km (213 mi). Perigee: 209 km (129 mi). Inclination: 51.80 deg. Period: 90.10 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 127 - . Payload: Zenit-4. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-08-16 . USAF Sat Cat: 2391 . COSPAR: 1966-071A. Apogee: 263 km (163 mi). Perigee: 201 km (124 mi). Inclination: 51.80 deg. Period: 89.10 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 128 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-09-04 . USAF Sat Cat: 2409 . COSPAR: 1966-079A. Apogee: 343 km (213 mi). Perigee: 207 km (128 mi). Inclination: 64.90 deg. Period: 90.00 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 130 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-10-28 . USAF Sat Cat: 2502 . COSPAR: 1966-093A. Apogee: 316 km (196 mi). Perigee: 204 km (126 mi). Inclination: 64.90 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 131 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-11-20 . USAF Sat Cat: 2568 . COSPAR: 1966-105A. Apogee: 335 km (208 mi). Perigee: 202 km (125 mi). Inclination: 72.80 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 134 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1966-12-11 . USAF Sat Cat: 2603 . COSPAR: 1966-108A. Apogee: 286 km (177 mi). Perigee: 206 km (128 mi). Inclination: 64.90 deg. Period: 89.50 min. High resolution photo reconnaissance satellite; returned film capsule; also carried scientific experiments..

• Cosmos 141 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-02-16 . USAF Sat Cat: 2670 . COSPAR: 1967-012A. Apogee: 316 km (196 mi). Perigee: 205 km (127 mi). Inclination: 72.90 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 150 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-03-30 . USAF Sat Cat: 2715 . COSPAR: 1967-025A. Apogee: 341 km (211 mi). Perigee: 178 km (110 mi). Inclination: 65.40 deg. Period: 89.60 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 155 - . Payload: Zenit-4. Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-04-20 . USAF Sat Cat: 2750 . COSPAR: 1967-033A. Apogee: 267 km (165 mi). Perigee: 200 km (120 mi). Inclination: 51.80 deg. Period: 89.20 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 161 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-05-30 . USAF Sat Cat: 2812 . COSPAR: 1967-049A. Apogee: 321 km (199 mi). Perigee: 201 km (124 mi). Inclination: 65.60 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 162 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-06-09 . USAF Sat Cat: 2827 . COSPAR: 1967-054A. Apogee: 275 km (170 mi). Perigee: 196 km (121 mi). Inclination: 51.80 deg. Period: 89.20 min. High resolution photo reconnaissance satellite; returned film capsule.

• Zenit-4 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: RVSN. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. High resolution photo reconnaissance mission..

• Zenit-4 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: RVSN. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. High resolution photo reconnaissance mission..

• Cosmos 172 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-08-17 . USAF Sat Cat: 2914 . COSPAR: 1967-078A. Apogee: 277 km (172 mi). Perigee: 206 km (128 mi). Inclination: 51.70 deg. Period: 89.30 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 175 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-09-19 . USAF Sat Cat: 2939 . COSPAR: 1967-085A. Apogee: 356 km (221 mi). Perigee: 181 km (112 mi). Inclination: 72.80 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 182 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-10-24 . USAF Sat Cat: 2995 . COSPAR: 1967-098A. Apogee: 374 km (232 mi). Perigee: 197 km (122 mi). Inclination: 64.90 deg. Period: 90.20 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 190 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-11-11 . USAF Sat Cat: 3026 . COSPAR: 1967-110A. Apogee: 327 km (203 mi). Perigee: 197 km (122 mi). Inclination: 65.60 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 194 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1967-12-11 . USAF Sat Cat: 3055 . COSPAR: 1967-119A. Apogee: 312 km (193 mi). Perigee: 201 km (124 mi). Inclination: 65.60 deg. Period: 89.60 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 201 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-02-14 . USAF Sat Cat: 3118 . COSPAR: 1968-009A. Apogee: 334 km (207 mi). Perigee: 207 km (128 mi). Inclination: 64.90 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 207 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-03-24 . USAF Sat Cat: 3154 . COSPAR: 1968-021A. Apogee: 320 km (190 mi). Perigee: 201 km (124 mi). Inclination: 65.60 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 214 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-04-26 . USAF Sat Cat: 3203 . COSPAR: 1968-032A. Apogee: 373 km (231 mi). Perigee: 200 km (120 mi). Inclination: 81.40 deg. Period: 90.30 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 224 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-06-12 . USAF Sat Cat: 3276 . COSPAR: 1968-046A. Apogee: 256 km (159 mi). Perigee: 203 km (126 mi). Inclination: 51.80 deg. Period: 89.10 min. High resolution photo reconnaissance satellite; returned film capsule; also measured atmospheric composition..

• Cosmos 227 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-06-26 . USAF Sat Cat: 3294 . COSPAR: 1968-051A. Apogee: 271 km (168 mi). Perigee: 202 km (125 mi). Inclination: 51.80 deg. Period: 89.20 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 229 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-07-04 . USAF Sat Cat: 3304 . COSPAR: 1968-054A. Apogee: 327 km (203 mi). Perigee: 207 km (128 mi). Inclination: 72.90 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 232 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-07-24 . USAF Sat Cat: 3322 . COSPAR: 1968-060A. Apogee: 348 km (216 mi). Perigee: 189 km (117 mi). Inclination: 65.30 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule; also performed weather experiments..

• Cosmos 234 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 6.00 days. Decay Date: 1968-08-05 . USAF Sat Cat: 3332 . COSPAR: 1968-062A. Apogee: 288 km (178 mi). Perigee: 208 km (129 mi). Inclination: 51.80 deg. Period: 89.40 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 237 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-09-04 . USAF Sat Cat: 3348 . COSPAR: 1968-071A. Apogee: 320 km (190 mi). Perigee: 200 km (120 mi). Inclination: 65.40 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 239 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-09-13 . USAF Sat Cat: 3353 . COSPAR: 1968-073A. Apogee: 274 km (170 mi). Perigee: 201 km (124 mi). Inclination: 51.80 deg. Period: 89.20 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 241 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-09-24 . USAF Sat Cat: 3398 . COSPAR: 1968-077A. Apogee: 326 km (202 mi). Perigee: 198 km (123 mi). Inclination: 65.40 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 246 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 5.00 days. Decay Date: 1968-10-12 . USAF Sat Cat: 3473 . COSPAR: 1968-087A. Apogee: 321 km (199 mi). Perigee: 149 km (92 mi). Inclination: 65.40 deg. Period: 89.20 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 254 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1968-11-29 . USAF Sat Cat: 3562 . COSPAR: 1968-104A. Apogee: 335 km (208 mi). Perigee: 197 km (122 mi). Inclination: 65.40 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 267 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-03-06 . USAF Sat Cat: 3765 . COSPAR: 1969-017A. Apogee: 331 km (205 mi). Perigee: 202 km (125 mi). Inclination: 70.00 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 270 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-03-14 . USAF Sat Cat: 3777 . COSPAR: 1969-022A. Apogee: 331 km (205 mi). Perigee: 200 km (120 mi). Inclination: 65.40 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 271 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-03-23 . USAF Sat Cat: 3807 . COSPAR: 1969-023A. Apogee: 324 km (201 mi). Perigee: 196 km (121 mi). Inclination: 65.40 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 274 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-04-01 . USAF Sat Cat: 3833 . COSPAR: 1969-028A. Apogee: 300 km (180 mi). Perigee: 206 km (128 mi). Inclination: 65.00 deg. Period: 89.60 min. High resolution photo reconnaissance satellite; returned film capsule; also carried science package..

• Cosmos 276 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 7.00 days. Decay Date: 1969-04-11 . USAF Sat Cat: 3854 . COSPAR: 1969-032A. Apogee: 371 km (230 mi). Perigee: 200 km (120 mi). Inclination: 81.40 deg. Period: 90.30 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 279 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-04-23 . USAF Sat Cat: 3893 . COSPAR: 1969-038A. Apogee: 267 km (165 mi). Perigee: 192 km (119 mi). Inclination: 51.70 deg. Period: 89.00 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 282 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-05-28 . USAF Sat Cat: 3944 . COSPAR: 1969-044A. Apogee: 321 km (199 mi). Perigee: 202 km (125 mi). Inclination: 65.40 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 284 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-06-06 . USAF Sat Cat: 3971 . COSPAR: 1969-048A. Apogee: 297 km (184 mi). Perigee: 204 km (126 mi). Inclination: 51.70 deg. Period: 89.50 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 286 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-06-23 . USAF Sat Cat: 3988 . COSPAR: 1969-052A. Apogee: 322 km (200 mi). Perigee: 197 km (122 mi). Inclination: 65.40 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 288 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-07-05 . USAF Sat Cat: 3994 . COSPAR: 1969-055A. Apogee: 273 km (169 mi). Perigee: 199 km (123 mi). Inclination: 51.80 deg. Period: 89.20 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 289 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 5.00 days. Decay Date: 1969-07-15 . USAF Sat Cat: 4034 . COSPAR: 1969-057A. Apogee: 324 km (201 mi). Perigee: 194 km (120 mi). Inclination: 65.30 deg. Period: 89.60 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 294 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-08-27 . USAF Sat Cat: 4074 . COSPAR: 1969-072A. Apogee: 329 km (204 mi). Perigee: 200 km (120 mi). Inclination: 65.40 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 296 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-09-06 . USAF Sat Cat: 4080 . COSPAR: 1969-075A. Apogee: 302 km (187 mi). Perigee: 207 km (128 mi). Inclination: 65.00 deg. Period: 89.60 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 297 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-09-10 . USAF Sat Cat: 4082 . COSPAR: 1969-076A. Apogee: 314 km (195 mi). Perigee: 207 km (128 mi). Inclination: 72.80 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 299 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 4.00 days. Decay Date: 1969-09-22 . USAF Sat Cat: 4097 . COSPAR: 1969-078A. Apogee: 284 km (176 mi). Perigee: 207 km (128 mi). Inclination: 65.00 deg. Period: 89.40 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 302 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-10-25 . USAF Sat Cat: 4130 . COSPAR: 1969-089A. Apogee: 321 km (199 mi). Perigee: 198 km (123 mi). Inclination: 65.40 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 310 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1969-11-23 . USAF Sat Cat: 4232 . COSPAR: 1969-100A. Apogee: 336 km (208 mi). Perigee: 204 km (126 mi). Inclination: 65.00 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 322 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1970-01-29 . USAF Sat Cat: 4315 . COSPAR: 1970-007A. Apogee: 298 km (185 mi). Perigee: 216 km (134 mi). Inclination: 65.30 deg. Period: 89.60 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 323 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1970-02-18 . USAF Sat Cat: 4328 . COSPAR: 1970-010A. Apogee: 314 km (195 mi). Perigee: 201 km (124 mi). Inclination: 65.40 deg. Period: 89.70 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 331 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1970-04-16 . USAF Sat Cat: 4364 . COSPAR: 1970-026A. Apogee: 320 km (190 mi). Perigee: 206 km (128 mi). Inclination: 65.00 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 345 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1970-05-28 . USAF Sat Cat: 4403 . COSPAR: 1970-039A. Apogee: 296 km (183 mi). Perigee: 153 km (95 mi). Inclination: 52.00 deg. Period: 89.00 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 346 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 7.00 days. Decay Date: 1970-06-17 . USAF Sat Cat: 4409 . COSPAR: 1970-042A. Apogee: 351 km (218 mi). Perigee: 206 km (128 mi). Inclination: 51.80 deg. Period: 90.00 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 349 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1970-06-25 . USAF Sat Cat: 4416 . COSPAR: 1970-045A. Apogee: 332 km (206 mi). Perigee: 199 km (123 mi). Inclination: 65.40 deg. Period: 89.80 min. High resolution photo reconnaissance satellite; returned film capsule.

• Cosmos 352 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1970-07-15 . USAF Sat Cat: 4446 . COSPAR: 1970-052A. Apogee: 340 km (210 mi). Perigee: 203 km (126 mi). Inclination: 51.80 deg. Period: 89.90 min. High resolution photo reconnaissance satellite; returned film capsule.

• Zenit-4 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: RVSN. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. High resolution photo reconnaissance mission..

• Cosmos 355 - . Mass: 6,300 kg (13,800 lb). Nation: Russia. Agency: MOM. Class: Surveillance. Type: Military surveillance satellite. Spacecraft Bus: Vostok. Spacecraft: Zenit-4. Duration: 8.00 days. Decay Date: 1970-08-15 . USAF Sat Cat: 4484 . COSPAR: 1970-058A. Apogee: 321 km (199 mi). Perigee: 198 km (123 mi). Inclination: 65.30 deg. Period: 89.60 min. High resolution photo reconnaissance satellite; returned film capsule.