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, 0.5 m
Radar Cross Section
0.350 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 ORBCOMM-X
1 21576U 91050C 26284.30408307 .00000241 00000-0 83569-4 0 9995
2 21576 98.2826 344.5337 0004074 153.5480 206.5919 14.43633570851527Epoch: 2026-10-11T07:17Z
TLE epoch observation values (Epoch: 2026-10-11T07:17:52.777Z)
Latitude
-0.00005°
Longitude
-144.83498°
Altitude
752.075 km
Speed
7.477 km/s
True Right ascension
22h 58m 08s
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
16:50:56
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
746.527 km
Perigee altitude
740.724 km
Semi-major axis
7,121.762 km
Eccentricity
0.00041
Inclination
98.2826°
RAAN
344.5337°
Arg. of periapsis
153.548°
True anomaly
206.57101°
Mean anomaly
206.5919°
Eccentric anomaly
206.58146°
Mean motion
3.61129 °/min
Orbital period
99.69 mins
BSTAR
0.000083569
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-10-12 03:23:19.386Z | 130.635° SE | 2026-10-12 03:27:19.386Z | 71.271° E | 34.011° | 2026-10-12 03:31:19.386Z | 8.765° NNE |
| 6 mins | 2026-10-12 05:03:19.386Z | 220.831° SW | 2026-10-12 05:06:19.386Z | 270.573° WNW | 25.913° | 2026-10-12 05:09:19.386Z | 314.557° NW |
| 8 mins | 2026-10-12 17:09:19.386Z | 8.964° NNE | 2026-10-12 17:12:19.386Z | 328.846° NNW | 75.646° | 2026-10-12 17:17:19.386Z | 198.919° SSW |
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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