|Mission type||ABM radar target|
|Launch mass||325 kilograms (717 lb)|
|Start of mission|
|Launch date||24 August 1967, 04:59:49UTC|
|Launch site||Plesetsk 133/1|
|End of mission|
|Decay date||17 December 1967|
|Perigee||261 kilometres (162 mi)|
|Apogee||471 kilometres (293 mi)|
Kosmos 173 (Russian: Космос 173 meaning Cosmos 173), also known as DS-P1-Yu No.8 was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles. It was built by the Yuzhnoye Design Bureau, and launched in 1967 as part of the Dnepropetrovsk Sputnik programme.
A Kosmos-2I 63SM carrier rocket was used to launch Kosmos 173 from Site 133/1 at Plesetsk Cosmodrome. The launch occurred at 04:59:49 UTC on 24 August 1967, and resulted in Kosmos 173's successful deployment into low earth orbit.
Kosmos 173 was operated in an orbit with a perigee of 261 kilometres (162 mi), an apogee of 471 kilometres (293 mi), 71.0 degrees of inclination, and an orbital period of 91.86 minutes. It remained in orbit until it decayed and reentered the atmosphere on 17 December 1967. It was the ninth of seventy nine DS-P1-Yu satellites to be launched, and the eighth of seventy two to successfully reach orbit.
- Wade, Mark. "DS-P1-Yu". Encyclopedia Astronautica. Retrieved 9 August 2009.
- McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 9 August 2009.
- Wade, Mark. "Kosmos 2". Encyclopedia Astronautica. Retrieved 9 August 2009.
- McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 9 August 2009.
- Krebs, Gunter. "DS-P1-Yu (11F618)". Gunter's Space Page. Retrieved 9 August 2009.
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