Kosmos 393

Mission type	ABM radar target
COSPAR ID	1971-007A
SATCAT no.	04884
Spacecraft properties
Spacecraft type	DS-P1-Yu
Manufacturer	Yuzhnoye
Launch mass	325 kilograms (717 lb)
Start of mission
Launch date	26 January 1971, 12:44:33 (1971-01-26UTC12:44:33Z) UTC
Rocket	Kosmos-2I 63SM
Launch site	Plesetsk 133/1
End of mission
Decay date	16 June 1971 (1971-06-17)
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	263 kilometres (163 mi)
Apogee altitude	451 kilometres (280 mi)
Inclination	71 degrees
Period	91.7 minutes

Kosmos 393 (Russian: Космос 393 meaning Cosmos 393), known before launch as DS-P1-Yu No.34, was a Soviet satellite which was launched in 1971 as part of the Dnepropetrovsk Sputnik programme. It was a 325-kilogram (717 lb) spacecraft, which was built by the Yuzhnoye Design Bureau, and was used as a radar calibration target for anti-ballistic missile tests.^[1]

Launch

Kosmos 393 was successfully launched into low Earth orbit on 26 January 1971, with the rocket lifting off at 12:44:33 UTC.^[2] The launch took place from Site 133/1 at the Plesetsk Cosmodrome,^[3] and used a Kosmos-2I 63SM carrier rocket.

Orbit

Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1971-007A.^[4]

Kosmos 393 was the thirty-ninth of seventy nine DS-P1-Yu satellites to be launched,^[1] and the thirty-sixth of seventy two to successfully reach orbit.^[5] It was operated in an orbit with a perigee of 263 kilometres (163 mi), an apogee of 451 kilometres (280 mi), 71 degrees of inclination, and an orbital period of 91.7 minutes.^[1][6] It remained in orbit until it decayed and reentered the atmosphere on 16 June 1971.^[6]