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Kosmos 423

Mission type	ABM radar target
COSPAR ID	1971-047A
SATCAT no.	05246
Spacecraft properties
Spacecraft type	DS-P1-Yu
Manufacturer	Yuzhnoye
Launch mass	325 kilograms (717 lb)
Start of mission
Launch date	27 May 1971, 11:59:55 (1971-05-27UTC11:59:55Z) UTC
Rocket	Kosmos-2I 63SM
Launch site	Plesetsk 133/1
End of mission
Decay date	26 November 1971 (1971-11-27)
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Perigee altitude	268 kilometres (167 mi)
Apogee altitude	462 kilometres (287 mi)
Inclination	71 degrees
Period	91.8 minutes

Kosmos 423 (Russian: Космос 423 meaning Cosmos 423), known before launch as DS-P1-Yu No.47, 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.

Launch

Kosmos 423 was successfully launched into low Earth orbit on 27 May 1971, with the rocket lifting off at 11:59:55 UTC. The launch took place from Site 133/1 at the Plesetsk Cosmodrome, and used a Kosmos-2I 63SM carrier rocket.

Orbit

Upon reaching orbit, it was assigned its Kosmos designation, and received the International Designator 1971-047A.

Kosmos 423 was the forty-third of seventy nine DS-P1-Yu satellites to be launched, and the thirty-ninth of seventy two to successfully reach orbit. It was operated in an orbit with a perigee of 268 kilometres (167 mi), an apogee of 462 kilometres (287 mi), 71 degrees of inclination, and an orbital period of 91.8 minutes. It remained in orbit until it decayed and reentered the atmosphere on 26 November 1971.

See also

• 1971 in spaceflight

References

1. ^ Wade, Mark. "DS-P1-Yu". Encyclopedia Astronautica. Archived from the original on 2 June 2012. Retrieved 27 August 2009.
2. Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Archived from the original on 18 June 2012. Retrieved 27 August 2009.
3. McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 27 August 2009.
4. "Cosmos 423". NSSDC Master Catalog. US National Space Science Data Center. Retrieved 27 August 2009.
5. Krebs, Gunter. "DS-P1-Yu (11F618)". Gunter's Space Page. Retrieved 27 August 2009.
6. ^ McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 27 August 2009.

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