Soviet Space ProgramTsiklon-290, Baikonur Cosmodrome, Republic of Kazakhstan
US-P 11
Launched
August 4, 1981
Image: Ukrainian Space Agency
Summary
US-P 11 launched on a Soviet Space Program Tsiklon-2 from 90, Baikonur Cosmodrome, Republic of Kazakhstan on August 4, 1981. It was Soviet Space Program's 1,511th launch, 60th this year and humanity's 2,465th orbital launch attempt. It was the 49th Tsiklon-2 flight and the 6th this year. The payload was bound for low Earth orbit (LEO). Kosmos-1286, one of 3 catalogued objects, reached a 438 × 451 km orbit inclined 65.0°. 3 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Tsiklon-2 · Soviet Space Program
- Booster
- No booster details on record.
- Mission
- Government/Top Secret · Low Earth Orbit (LEO)
- Milestone
- 49th Tsiklon-2 flight · 6th this yearSoviet Space Program's 1,511th launch60th this yearhumanity's 2,465th orbital launch attempt74th orbital launch attempt this year
Flight preview
Orbit: as tracked
Kosmos-1286 · NORAD 12631 · 1981-072 · Space-Track · tracking 1 of 3 objects
Show the numbers for orbit elements
- Object
- COSMOS 1286
- Object ID
- 1981-072A
- Epoch
- 1981-08-04 17:35:34 UTC
- Mean motion
- 15.43007755 rev/day
- Eccentricity
- 0.0009733
- Inclination
- 65.0437°
- Ascending node
- 113.5366°
- Arg. of perigee
- 268.4916°
- Mean anomaly
- 91.5012°
- Element set
- 999
- Rev at epoch
- 5
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO. Ascent drawn from padside's representative profile.
Catalogued objects
3 catalogued: 1 payload, 1 rocket stage, 1 debris; none still in orbit
- Kosmos-1286 · NORAD 12631 · broke up September 29, 1982
Tsiklon-2 28-203 Stage 2 · re-entered August 4, 1981
Data from J. McDowell, planet4589.org
About this launch
Ocean surveillance satellite using passive ELINT devices
Pad
90, Baikonur Cosmodrome, Republic of Kazakhstan
31st launch from 90, 6th this year · 604th from Baikonur Cosmodrome, Republic of Kazakhstan
74 launches from this pad · 1,565 from Baikonur Cosmodrome, Republic of Kazakhstan
105 days after the previous launch from this pad
All launches from Baikonur Cosmodrome, Republic of KazakhstanOpen in maps
Questions
When did US-P 11 launch?
US-P 11 launched on August 4, 1981. The time is known to the hour, not the minute.
Where can I watch US-P 11?
No webcast is on record for this launch.
What rocket launched US-P 11?
Tsiklon-2, flown by Soviet Space Program. Tsiklon-2 spec sheet
Where did US-P 11 launch from?
90, Baikonur Cosmodrome, Republic of Kazakhstan.
What orbit did US-P 11 reach?
Kosmos-1286, one of 3 catalogued objects, reached a 438 × 451 km orbit inclined 65.0°.
How many satellites did US-P 11 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).