COSMOS 2165, 21779
Orbit data source: Space-Track
COSMOS 2165, 21779 is a payload satellite owned by UNKS RF (CIS) in LEO that was launched on Tue, 12 Nov 1991 UTC via a TSIKLON-3 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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21779 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
CISRelated business
Manufacturer
NPO PM
Mission
Defense Communications
Bus & Motor
STRELA-3, Unknown motor
Mass
225 kg wet, 225 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 0.8 m
Radar Cross Section
1.257 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 10 hours ago
TLE from 10 hours ago
0 COSMOS 2165
1 21779U 91077A 26036.07547594 .00000044 00000-0 18080-3 0 9996
2 21779 82.6100 316.6055 0010774 1.0766 9.4960 12.64917431580290Epoch: 2026-02-05T01:48Z
TLE epoch observation values (Epoch: 2026-02-05T01:48:41.121Z)
Latitude
10.45533°
Longitude
155.5659°
Altitude
1,396.435 km
Speed
7.166 km/s
True Right ascension
21h 11m 52s
True Declination
10° 23' 57"
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
13:52:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,408.409 km
Perigee altitude
1,391.649 km
Semi-major axis
7,778.166 km
Eccentricity
0.00108
Inclination
82.61°
RAAN
316.6055°
Arg. of periapsis
1.0766°
True anomaly
9.5164°
Mean anomaly
9.496°
Eccentric anomaly
9.5062°
Mean motion
3.16393 °/min
Orbital period
113.78 mins
BSTAR
0.0001808
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Other satellites on launch #77 in the year 1991 (1991-11-12 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 2165 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. |
|---|---|---|---|---|---|---|---|
| 15 mins | 2026-02-05 18:55:55.345Z | 171.008° S | 2026-02-05 19:02:55.345Z | 97.726° ESE | 42.512° | 2026-02-05 19:10:55.345Z | 13.372° NNE |
| 11 mins | 2026-02-05 20:53:55.345Z | 250.825° W | 2026-02-05 20:58:55.345Z | 297.187° NW | 22.838° | 2026-02-05 21:04:55.345Z | 344.582° N |
| 11 mins | 2026-02-06 04:57:55.345Z | 24.659° NE | 2026-02-06 05:02:55.345Z | 70.314° E | 23.577° | 2026-02-06 05:08:55.345Z | 119.641° SE |
| 15 mins | 2026-02-06 06:50:55.345Z | 345.244° N | 2026-02-06 06:57:55.345Z | 274.338° WNW | 42.165° | 2026-02-06 07:05:55.345Z | 189.096° SSW |
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 descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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