| Kosmos 101 | |
| Mission Type: | ABM radar target |
| Cospar Id: | 1965-107A |
| Satcat: | 01846 |
| Mission Duration: | 203 days |
| Spacecraft Type: | DS-P1-Yu |
| Manufacturer: | Yuzhnoye |
| Launch Mass: | 325 kg[1] |
| Launch Date: | 21 December 1965 06:14:00 GMT |
| Launch Rocket: | Kosmos-2I 63S1 |
| Launch Site: | Kapustin Yar, Site 86/1 |
| Launch Contractor: | Yuzhnoye |
| Decay Date: | 12 July 1966 |
| Orbit Epoch: | 21 December 1965 |
| Orbit Reference: | Geocentric[2] |
| Orbit Regime: | Low Earth |
| Orbit Periapsis: | 254 km |
| Orbit Apoapsis: | 539 km |
| Orbit Inclination: | 49.0° |
| Orbit Period: | 92.4 minutes |
| Apsis: | gee |
Kosmos 101 (ru|Космос 101 meaning Cosmos 101), also known as DS-P1-Yu No.4 was a Soviet satellite which was used as a radar calibration target for tests of anti-ballistic missiles.[3] It was built by the Yuzhnoye Design Bureau, and launched in 1965 as part of the Dnepropetrovsk Sputnik programme.[4]
The launch of Kosmos 101 was conducted using a Kosmos-2I 63S1 carrier rocket,[5] which flew from Site 86/1 at Kapustin Yar. The launch occurred at 06:14 GMT on 21 December 1965.[6]
Kosmos 101 separated from its carrier rocket into a low Earth orbit with a perigee of, an apogee of, an inclination of 49.0°, and an orbital period of 92.4 minutes. It decayed from orbit on 12 July 1966.[7] Kosmos 101 was the fourth of seventy nine DS-P1-Yu satellites to be launched,[4] of which all but seven were successful.