COSMOS 1261, 12376
Orbit data source: Space-Track
COSMOS 1261, 12376 is a payload satellite owned by PVO (CIS) in HEO that was launched on Tue, 31 Mar 1981 UTC via an MOLNIYA 8K78M launch vehicle from the Plesetsk Missile And Space Complex (PKMTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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12376 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
NPOL/KOMET
Mission
Spacecraft
Bus & Motor
OKO, Unknown motor
Mass
~1,250 kg wet, ~1,150 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 3 days ago
TLE from 3 days ago
0 COSMOS 1261
1 12376U 81031A 25301.49162237 .00000072 00000-0 00000-0 0 9996
2 12376 68.6327 103.1597 5982905 356.6314 0.6107 2.00915726222827Epoch: 2025-10-28T11:47Z
TLE epoch observation values (Epoch: 2025-10-28T11:47:56.172Z)
Latitude
-0.00004°
Longitude
-110.90958°
Altitude
4,285.18 km
Speed
7.729 km/s
True Right ascension
06h 52m 36s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
06:43:10
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
36,021.875 km
Perigee altitude
4,278.554 km
Semi-major axis
26,528.351 km
Eccentricity
0.59829
Inclination
68.6327°
RAAN
103.1597°
Arg. of periapsis
356.6314°
True anomaly
3.03135°
Mean anomaly
0.6107°
Eccentric anomaly
1.51999°
Mean motion
0.50232 °/min
Orbital period
716.68 mins
BSTAR
0
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Other satellites on launch #31 in the year 1981 (1981-03-31 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.COSMOS 1261 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 79 mins | 2025-10-31 11:27:37.772Z | 186.708° SSW | 2025-10-31 11:46:37.772Z | 98.055° ESE | 43.883° | 2025-10-31 12:46:37.772Z | 29.818° NE |
| 216 mins | 2025-11-01 00:20:37.772Z | 335.021° NNW | 2025-11-01 01:27:37.772Z | 299.988° NW | 31.049° | 2025-11-01 03:56:37.772Z | 275.316° WNW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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