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Kosmos 146
Zond Assembly.jpg
An image of a Zond / Kosmos spacecraft being assembled, which was the same type of spacecraft as Kosmos 146.
Mission typeTest flight Moon Race
OperatorSoviet space program
COSPAR ID1967-021A
SATCAT no.02705
Mission duration8 days
Spacecraft properties
Spacecraft type7K-L1
Launch mass5375 kg [1]
Start of mission
Launch date10 March 1967, 11:30:33 GMT
RocketProton-K / Blok D
Launch siteBaikonur, Site 81/23
End of mission
Decay date18 March 1967
Orbital parameters
Reference systemGeocentric [2]
RegimeHighly elliptical Earth
Periapsis altitude177 km
Apoapsis altitude296 km
Period89.2 minutes
Epoch10 March 1967
Kosmos (satellite)
(Crewed missions)

Kosmos 146 (Russian: Космос 146 meaning Cosmos 146), also known as L-1 No. 2P, was a Soviet test spacecraft precursor to the Zond series, launched from the Baikonur Cosmodrome aboard a Proton K rocket.[3]

The spacecraft was designed to launch a crew from the Earth to conduct a flyby of the Moon and return to Earth. The primary focus was a Soviet circumlunar flight, which help document the Moon, and also show Soviet power. The test ran from the Zond program from 1967-1970, which produced multiple failures in the 7K-L1's re-entry systems. The remaining 7K-L1s were scrapped, ultimately replaced by the Soyuz 7K-L3.[4]


Kosmos 146 was a Soviet test precursor to the Zond series, launched from the Baikonur cosmodrome aboard a Proton K rocket. It was launched into a planned highly elliptical Earth orbit. The Blok D stage functioned correctly in putting the spacecraft into a translunar trajectory. It was not aimed at the Moon and no recovery of the spacecraft was planned or attempted. It was a successful mission that created false confidence just before a string of failures that would follow.[1]

Kosmos 146 was launched using a Proton-K carrier rocket, which flew from Site 81/23 at Baikonur. The launch occurred at 11:30:33 GMT on 10 March 1967 and was successful. Kosmos 146 was operated in an Earth orbit, it had a perigee of 177 kilometres (110 mi), an apogee of 296 kilometres (184 mi), an inclination of 51.5° and an orbital period of 89.2 minutes. Kosmos 146 decayed from orbit on 18 March 1967.[2]

Moon race

By the time the spacecraft was launched, the United States had already thrust into the orbit in their prototype of the lunar vehicle (AS-201, AS-202, AS-203). The United States could go on to launch manned prototypes of lunar ships before the USSR brought the first unmanned prototype into orbit, but two months before the launch of Kosmos-146, during the fire in the command module, the crew of Apollo 1 was killed.


  1. ^ a b "Cosmos 146: Display 1967-021A". NASA. 27 February 2020. Retrieved 11 April 2020. This article incorporates text from this source, which is in the public domain.
  2. ^ a b "Cosmos 146: Trajectory 1967-021A". NASA. 27 February 2020. Retrieved 11 April 2020.
  3. ^ Harvey, Brian (2007). Soviet and Russian Lunar Exploration. Springer Science & Business Media. p. 138. ISBN 9780387739762.
  4. ^ Harvey, Brian (2007). Soviet and Russian Lunar Exploration. Springer Science & Business Media. p. 138. ISBN 9780387739762.

External links

This page was last edited on 8 January 2021, at 18:21
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