COSMOS 2170, 21784
Orbit data source: Space-Track
COSMOS 2170, 21784 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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21784 intel report (Beta)
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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: 13 hours ago
TLE from 13 hours ago
0 COSMOS 2170
1 21784U 91077F 26235.44228536 .00000031 00000-0 11604-3 0 9997
2 21784 82.6052 226.2958 0003495 122.8835 43.5653 12.62588798602562Epoch: 2026-08-23T10:36Z
TLE epoch observation values (Epoch: 2026-08-23T10:36:53.455Z)
Latitude
13.37667°
Longitude
-86.42509°
Altitude
1,412.301 km
Speed
7.156 km/s
True Right ascension
02h 58m 08s
True Declination
13° 18' 21"
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
14:59:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,412.318 km
Perigee altitude
1,406.875 km
Semi-major axis
7,787.734 km
Eccentricity
0.00035
Inclination
82.6052°
RAAN
226.2958°
Arg. of periapsis
122.8835°
True anomaly
43.59291°
Mean anomaly
43.5653°
Eccentric anomaly
43.5791°
Mean motion
3.1581 °/min
Orbital period
113.99 mins
BSTAR
0.00011604
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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 2170 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 | 2026-08-24 01:03:01.336Z | 214.879° SW | 2026-08-24 01:10:01.336Z | 278.345° WNW | 35.459° | 2026-08-24 01:18:01.336Z | 355.608° N |
| 5 mins | 2026-08-24 09:13:01.336Z | 43.772° NE | 2026-08-24 09:15:01.336Z | 59.05° ENE | 13.286° | 2026-08-24 09:18:01.336Z | 81.672° E |
| 14 mins | 2026-08-24 11:05:01.336Z | 357.711° N | 2026-08-24 11:12:01.336Z | 101.015° ESE | 43.755° | 2026-08-24 11:19:01.336Z | 165.438° S |
| 10 mins | 2026-08-24 13:01:01.336Z | 318.547° NNW | 2026-08-24 13:06:01.336Z | 277.038° WNW | 19.942° | 2026-08-24 13:11:01.336Z | 237.723° WSW |
| 4 mins | 2026-08-24 22:04:01.336Z | 86.593° E | 2026-08-24 22:06:01.336Z | 71.666° E | 12.036° | 2026-08-24 22:08:01.336Z | 57.122° ENE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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