Kosmos 25 (Russian: Космос 25 meaning Cosmos 25), also known as DS-P1 No.4 was a prototype radar target satellite for anti-ballistic missile tests, which was launched by the Soviet Union in 1964 as part of the Dnepropetrovsk Sputnik programme. Its primary mission was to demonstrate the necessary technologies for radar tracking of spacecraft, which would allow future satellites to function as targets.^[3]

It was launched aboard a Kosmos-2I 63S1 rocket,^[4] from Mayak-2atKapustin Yar. The launch occurred at 13:26 GMT on 27 February 1964.^[5]

Kosmos 25 was placed into a low Earth orbit with a perigee of 255 kilometres (158 mi), an apogee of 526 kilometres (327 mi), 49.0° of inclination, and an orbital period of 92.3 minutes.^[3]Itdecayed from orbit on 21 November 1964.^[6]

Kosmos 25 was a prototype DS-P1 satellite, the last of four to be launched.^[3] Of these, it was the third to successfully reach orbit after Kosmos 6 and Kosmos 19.^[7] It was succeeded by the first operational DS-P1 satellite, Kosmos 36.

References[edit]

^ https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1964-010A - 27 February 2020

^ https://nssdc.gsfc.nasa.gov/nmc/spacecraft/displayTrajectory.action?id=1964-010A - 27 February 2020

^ ^a ^b ^c Wade, Mark. "DS-P1". Encyclopedia Astronautica. Archived from the original on 9 July 2012. Retrieved 26 May 2009.

^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 26 May 2009.

^ Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Archived from the original on 18 June 2012. Retrieved 26 May 2009.

^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 26 May 2009.

^ Wade, Mark. "DS". Encyclopedia Astronautica. Archived from the original on 31 March 2009. Retrieved 26 May 2009.

Dnepropetrovsk Sputnik programme

DS-1

DS-2

Kosmos 1

DS-A1

Kosmos 11

Kosmos 17

Kosmos 53

Kosmos 70

DS-K

Kosmos 8

K-40 #1

K-40 #2

DS-MG

Kosmos 26

Kosmos 49

DS-MT

Kosmos 31

Kosmos 51

DS-MO

Kosmos 149

Kosmos 320

DS-P1

Test

Kosmos 6

Kosmos 19

Kosmos 25

P1-I

Kosmos 106

P1-M

P1-Yu

Kosmos 36

#23

#36

#39

#33

#51

#68

DS-U1

Kosmos 108

DS-U2

Kosmos 93

DS-U3

Kosmos 166

Kosmos 14

Kosmos 23

← 1963

Orbital launches in 1964

1965 →

Poppy 3

Zond 3MV-1 No.2

BE-A

Luna E-6 No.6

OPS 3467

Luna E-6 No.5

Transit 5BN-3

Transit 5E-4

Molniya-1 No.2

ESRS

Atlas-Centaur 3

Titan 3A-2

OPS 4036

Strela-1 No.6

Strela-1 No.7

Strela-1 No.8

DS-2 No.2

Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).

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