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, Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 21 hours ago
TLE from 21 hours ago
0 COSMOS 2170
1 21784U 91077F 26053.26202947 .00000034 00000-0 12745-3 0 9993
2 21784 82.6144 342.1465 0002173 167.6847 345.8079 12.62583941579576Epoch: 2026-02-22T06:17Z
TLE epoch observation values (Epoch: 2026-02-22T06:17:19.346Z)
Latitude
26.30858°
Longitude
-88.01317°
Altitude
1,413.713 km
Speed
7.157 km/s
True Right ascension
10h 33m 57s
True Declination
26° 11' 01"
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
06:44:19
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,411.308 km
Perigee altitude
1,407.924 km
Semi-major axis
7,787.753 km
Eccentricity
0.00022
Inclination
82.6144°
RAAN
342.1465°
Arg. of periapsis
167.6847°
True anomaly
345.80179°
Mean anomaly
345.8079°
Eccentric anomaly
345.80485°
Mean motion
3.15809 °/min
Orbital period
113.99 mins
BSTAR
0.00012745
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-02-23 04:56:37.086Z | 36.507° NE | 2026-02-23 04:59:37.086Z | 59.213° ENE | 13.947° | 2026-02-23 05:03:37.086Z | 89.119° E |
| 14 mins | 2026-02-23 06:49:37.086Z | 356.808° N | 2026-02-23 06:56:37.086Z | 106.659° ESE | 44.106° | 2026-02-23 07:03:37.086Z | 167.21° S |
| 9 mins | 2026-02-23 08:46:37.086Z | 311.251° NW | 2026-02-23 08:50:37.086Z | 276.896° WNW | 19.117° | 2026-02-23 08:55:37.086Z | 238.565° WSW |
| 4 mins | 2026-02-23 17:48:37.086Z | 86.579° E | 2026-02-23 17:49:37.086Z | 79.006° E | 12.767° | 2026-02-23 17:52:37.086Z | 56.57° ENE |
| 15 mins | 2026-02-23 19:36:37.086Z | 177.899° S | 2026-02-23 19:43:37.086Z | 90.198° ESE | 44.37° | 2026-02-23 19:51:37.086Z | 10.466° NNE |
| 10 mins | 2026-02-23 21:34:37.086Z | 254.438° W | 2026-02-23 21:39:37.086Z | 296.006° NW | 19.906° | 2026-02-23 21:44:37.086Z | 336.413° NNW |
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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