| 词条 | Kosmos 1261 |
| 释义 |
| name = Kosmos 1261 | mission_type = Early warning | operator = | COSPAR_ID = 1981-031A | SATCAT = 12376 | mission_duration = 4 years [1] | spacecraft_type = US-K [2] | manufacturer = | launch_mass = {{convert|1900|kg}} | launch_date = {{start-date|31 March 1981, 09:40|timezone=yes}} UTC | launch_rocket = Molniya-M/2BL[2] | launch_site = Plesetsk Cosmodrome[2][5] | entered_service = | disposal_type = | deactivated = 1 May 1981[1] | decay_date = | orbit_epoch = | orbit_reference = Geocentric | orbit_regime = Molniya [2] | orbit_periapsis = {{convert|637|km}}[7] | orbit_apoapsis = {{convert|39747|km}}[7] | orbit_inclination = 63.0 degrees[7] | orbit_period = 718.39 minutes[7] | orbit_slot = | apsis = gee }}Kosmos 1261 ({{lang-ru|Космос 1261}} meaning Cosmos 1261) was a Soviet US-K missile early warning satellite which was launched in 1981 as part of the Soviet military's Oko programme. The satellite was designed to identify missile launches using optical telescopes and infrared sensors.[2] Kosmos 1261 was launched from Site 41/1 at Plesetsk Cosmodrome in the Russian SSR.[5] A Molniya-M carrier rocket with a 2BL upper stage was used to perform the launch, which took place at 09:40 UTC on 31 March 1981.[5] The launch successfully placed the satellite into a molniya orbit. It subsequently received its Kosmos designation, and the international designator 1981-031A.[7] The United States Space Command assigned it the Satellite Catalog Number 12376.[7] It self-destructed.[1] See also{{Portal|Spaceflight}}
References 4 : Kosmos satellites|Oko|Spacecraft launched in 1981|Spacecraft launched by Molniya-M rockets |
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