ORBCOMM FM25
NORAD 25479
Payload
LEO
1998-053E
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LEO · NORAD 25479
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🛰️ Orbital Parameters
Perigee
760 km
Apogee
765 km
Inclination
45.0°
Period
100.1 min
Mean Motion
14.38907206 rev/day
TLE Epoch
2026-03-17 15:00:00 UTC
📐 Computed Orbital Characteristics
Avg. Altitude763 km
Orbital Velocity26,910 km/h
Velocity7.48 km/s
Orbital Period100 minutes
Orbits / Day14.39
Eccentricity0.0004
Semi-Major Axis7,134 km
Est. Orbital Lifetime~25–100 years
🚀 Launch & Identity
Country / Operator
ORBCOMM
Launch Date
1998-09-23
Launch Site
Esrange, Sweden
Int'l Designator
1998-053E
Object Type
Payload
RCS Size
Medium (0.1–1 m²)
🔗 Constellation / Groups
orbcomm
📖 About This Object
ORBCOMM FM25 is an active satellite operated by ORBCOMM, launched on 1998-09-23 from Esrange, Sweden. With over 28 years in orbit, it has far exceeded many satellites’ design lifetimes. It orbits in Low Earth Orbit (LEO) at altitudes between 760 km and 765 km with an inclination of 45.0°. It travels at approximately 26,910 km/h (7.48 km/s), completing one full orbit every 100 minutes — that’s roughly 14.39 orbits per day. Its near-circular orbit (eccentricity close to zero) means it maintains a very consistent altitude throughout each revolution. It is part of the Orbcomm constellation group. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~25–100 years. Orbital Radar tracks ORBCOMM FM25 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.
🌍 Orbit Context
ORBCOMM FM25 occupies the mid-LEO band between 600 and 1,000 km, where atmospheric drag is minimal but radiation exposure remains low. This altitude range balances orbital longevity (decades to centuries) with reasonable ground coverage, making it popular for remote sensing constellations, scientific instruments and weather satellites. Debris concerns are significant here because objects persist far longer than in lower orbits.
🔗 ORBCOMM Constellation
This satellite is part of the ORBCOMM constellation, providing machine-to-machine (M2M) and Internet of Things (IoT) connectivity. The OG2 (second-generation) constellation operates in LEO and supports asset tracking, fleet management and industrial monitoring for transportation, heavy equipment, maritime and energy sectors.
❓ Frequently Asked Questions
ORBCOMM FM25 orbits in Low Earth Orbit (LEO) at altitudes between 760 km (perigee) and 765 km (apogee), with an average altitude of approximately 763 km. It completes one orbit every 100 minutes, travelling at approximately 26,910 km/h (16,721 mph).
ORBCOMM FM25 is operated by ORBCOMM. It is catalogued by the U.S. Space Surveillance Network under NORAD ID 25479. You can track ORBCOMM FM25 in real time on Orbital Radar’s live tracker.
ORBCOMM FM25 was launched on 1998-09-23 from Esrange, Sweden. At its current altitude, the estimated remaining orbital lifetime is: ~25–100 years.
Yes — Orbital Radar tracks ORBCOMM FM25 (NORAD ID 25479) using the latest TLE (two-line element set) data from Space-Track and CelesTrak. Open the live tracker to see its current position, altitude, speed and orbital path updated in real time.
ORBCOMM FM25 travels at approximately 26,910 km/h (16,721 mph) — roughly 7.48 km/s. It completes 14.39 orbits per day, meaning the crew or instruments aboard (if any) would experience approximately 29 sunrises and sunsets every 24 hours.
ORBCOMM FM25 is a member of the Orbcomm constellation. Satellites in this group work together to provide coordinated coverage, typically in similar orbital planes at comparable altitudes. You can view all Orbcomm satellites on Orbital Radar’s live tracker.