COSMOS 2148, 21304
Orbit data source: Space-Track
COSMOS 2148, 21304 is a payload satellite owned by UNKS RF (CIS) in LEO that was launched on Thu, 16 May 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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21304 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: 2 days ago
TLE from 2 days ago
0 COSMOS 2148
1 21304U 91033F 26171.35346380 .00000035 00000-0 12972-3 0 9997
2 21304 82.5730 267.9941 0022194 307.8424 114.7241 12.65994310621505Epoch: 2026-06-20T08:28Z
TLE epoch observation values (Epoch: 2026-06-20T08:28:59.272Z)
Latitude
61.96217°
Longitude
-113.72503°
Altitude
1,416.128 km
Speed
7.155 km/s
True Right ascension
18h 48m 21s
True Declination
61° 49' 53"
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
00:50:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,412.869 km
Perigee altitude
1,378.363 km
Semi-major axis
7,773.753 km
Eccentricity
0.00222
Inclination
82.573°
RAAN
267.9941°
Arg. of periapsis
307.8424°
True anomaly
114.95484°
Mean anomaly
114.7241°
Eccentric anomaly
114.8395°
Mean motion
3.16663 °/min
Orbital period
113.69 mins
BSTAR
0.00012972
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Other satellites on launch #33 in the year 1991 (1991-05-16 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 2148 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. |
|---|---|---|---|---|---|---|---|
| 14 mins | 2026-06-22 17:40:49.894Z | 3.254° NNE | 2026-06-22 17:46:49.894Z | 68.878° E | 40.942° | 2026-06-22 17:54:49.894Z | 157.19° SSE |
| 11 mins | 2026-06-22 19:35:49.894Z | 324.155° NNW | 2026-06-22 19:40:49.894Z | 281.337° WNW | 24.499° | 2026-06-22 19:46:49.894Z | 228.864° WSW |
| 14 mins | 2026-06-23 06:25:49.894Z | 164.689° S | 2026-06-23 06:32:49.894Z | 78.788° E | 40.379° | 2026-06-23 06:39:49.894Z | 16.212° NNE |
| 12 mins | 2026-06-23 08:21:49.894Z | 239.468° WSW | 2026-06-23 08:27:49.894Z | 294.088° NW | 25.485° | 2026-06-23 08:33:49.894Z | 344.726° N |
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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