ORBCOMM-X, 21576
Orbit data source: Space-Track
ORBCOMM-X, 21576 is a payload satellite owned by Orbcomm (US) in SSO that was launched on Wed, 17 Jul 1991 UTC via an ARIANE 40 launch vehicle from the French Guiana (FRGUI). 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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21576 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
Fairchild
Mission
Non-operational Commercial Communications
Bus & Motor
ORBCOMM-X, Unknown motor
Mass
17 kg wet, 17 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Hex Box, 0.3 m
Radar Cross Section
0.350 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 ORBCOMM-X
1 21576U 91050C 26171.46549885 .00000191 00000-0 69043-4 0 9999
2 21576 98.2956 234.6391 0004422 138.1503 222.0026 14.43583276835242Epoch: 2026-06-20T11:10Z
TLE epoch observation values (Epoch: 2026-06-20T11:10:19.100Z)
Latitude
-0.00008°
Longitude
158.3798°
Altitude
751.986 km
Speed
7.477 km/s
True Right ascension
15h 38m 33s
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
23:08:35
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
746.941 km
Perigee altitude
740.642 km
Semi-major axis
7,121.928 km
Eccentricity
0.00044
Inclination
98.2956°
RAAN
234.6391°
Arg. of periapsis
138.1503°
True anomaly
221.96871°
Mean anomaly
222.0026°
Eccentric anomaly
221.98565°
Mean motion
3.61116 °/min
Orbital period
99.69 mins
BSTAR
0.000069043
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Other satellites on launch #50 in the year 1991 (1991-07-17 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.ORBCOMM-X 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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-06-22 16:58:18.622Z | 17.132° NNE | 2026-06-22 17:03:18.622Z | 135.635° SSE | 43.362° | 2026-06-22 17:07:18.622Z | 186.827° SSW |
| 9 mins | 2026-06-23 04:09:18.622Z | 163.928° S | 2026-06-23 04:14:18.622Z | 14.638° NNE | 44.729° | 2026-06-23 04:18:18.622Z | 348.067° 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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