ORBCOMM FM 23, 25477
Orbit data source: Space-Track
ORBCOMM FM 23, 25477 is a payload satellite owned by Orbcomm (US) in LEO that was launched on Wed, 23 Sep 1998 UTC via a PEGASUS XL/HAPS launch vehicle from the Pegasus Launch, Eastern Range Air Space (ERAS). 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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25477 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
US / ORBRelated business
Manufacturer
OSC-Germantown
Mission
Non-operational Commercial Communications
Bus & Motor
MICROSTAR, Unknown motor
Mass
42 kg wet, 42 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl + 2 Pan, 4.2 m
Radar Cross Section
1.484 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 13 hours ago
TLE from 13 hours ago
0 ORBCOMM FM 23
1 25477U 98053C 25346.73931182 .00001588 00000-0 56639-3 0 9998
2 25477 45.0065 145.5168 0002091 59.1666 300.9388 14.38032009423091Epoch: 2025-12-12T17:44Z
TLE epoch observation values (Epoch: 2025-12-12T17:44:36.541Z)
Latitude
0°
Longitude
157.68794°
Altitude
764.24 km
Speed
7.474 km/s
True Right ascension
09h 42m 04s
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
05:22:57
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
768.047 km
Perigee altitude
765.059 km
Semi-major axis
7,144.69 km
Eccentricity
0.00021
Inclination
45.0065°
RAAN
145.5168°
Arg. of periapsis
59.1666°
True anomaly
300.91825°
Mean anomaly
300.9388°
Eccentric anomaly
300.92852°
Mean motion
3.59392 °/min
Orbital period
100.17 mins
BSTAR
0.00056639
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Other satellites on launch #53 in the year 1998 (1998-09-23 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 FM 23 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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2025-12-13 12:14:33.587Z | 159.146° S | 2025-12-13 12:16:33.587Z | 135.508° SSE | 13.93° | 2025-12-13 12:18:33.587Z | 111.375° ESE |
| 8 mins | 2025-12-13 13:57:33.587Z | 222.853° SW | 2025-12-13 14:01:33.587Z | 127.697° SE | 40.23° | 2025-12-13 14:05:33.587Z | 72.544° E |
| 9 mins | 2025-12-13 15:42:33.587Z | 272.17° WNW | 2025-12-13 15:46:33.587Z | 352.206° N | 40.202° | 2025-12-13 15:51:33.587Z | 66.343° ENE |
| 8 mins | 2025-12-13 17:28:33.587Z | 296.877° NW | 2025-12-13 17:32:33.587Z | 20.551° NNE | 37.779° | 2025-12-13 17:36:33.587Z | 80.782° E |
| 9 mins | 2025-12-13 19:13:33.587Z | 291.764° WNW | 2025-12-13 19:17:33.587Z | 237.259° WSW | 44.511° | 2025-12-13 19:22:33.587Z | 120.308° SE |
| 6 mins | 2025-12-13 20:59:33.587Z | 262.001° W | 2025-12-13 21:02:33.587Z | 220.279° SW | 20.691° | 2025-12-13 21:05:33.587Z | 180.233° SSW |
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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