| Kosmos 1409 | |
| Names List: | Космос 1409 |
| Mission Type: | Early warning system |
| Operator: | Russian Strategic Nuclear Forces |
| Cospar Id: | 1982-095A |
| Satcat: | 13585 |
| Mission Duration: | 4 years (achieved) [1] |
| Spacecraft Type: | Oko No. 6008 |
| Spacecraft Bus: | US-K |
| Dimensions: | long and diameter |
| Launch Date: | 22 September 1982, 06:23:11 UTC[2] |
| Launch Rocket: | Molniya-M / Blok 2BL |
| Launch Site: | Plesetsk, Site 16/2 |
| Launch Contractor: | TsSKB-Progress |
| Entered Service: | 22 September 1982 |
| Deactivated: | 5 January 1987 |
| Decay Date: | 8 June 2009 |
| Orbit Reference: | Geocentric orbit[3] |
| Orbit Regime: | Molniya orbit |
| Orbit Slot: | 2 |
| Orbit Inclination: | 62.80° |
| Orbit Period: | 709.00 minutes |
| Apsis: | gee |
| Instruments: | Telescope |
| Programme: | Kosmos Series |
| Previous Mission: | Kosmos 1408 |
| Next Mission: | Kosmos 1410 |
Kosmos 1409 (Russian: Космос 1409 meaning Cosmos 1409) was a Soviet US-K missile early warning satellite which was launched in 1982 as part of the Soviet military's Oko programme.[4] Kosmos 1409 replaced Kosmos 1217 as part of the Oko constellation of satellites and covered the plane 2 - 317° longitude of ascending node.[5]
The satellite was designed to identify missile launches using optical telescopes and infrared sensors.[4]
Kosmos 1409 was launched from Site 16/2 from Plesetsk Cosmodrome in Soviet Union.[2] A Molniya-M launch vehicle with a Blok 2BL upper stage was used to perform the launch, which took place at 06:23:11 UTC on 22 September 1982.[2] The launch successfully placed the satellite into a Molniya orbit. It subsequently received its Kosmos designation, and the COSPAR International Designator 1982-095A. The United States Space Command assigned it the Satellite Catalog Number 13585.
It reentered the Earth's atmosphere on 8 June 2009.[6]