Key statistics
Satellite IRIDIUM 39 at a glance.
Uptime
10262
Days in orbit
Revolutions
≈ 14.5
Per day
Orbit
LEO
Low Earth Orbit
Inclination
86.4
Latest
Satellite identification and parameters
Extended collection of information and parameters for IRIDIUM 39.
Object identification
Identified? True
Debris? False
Object name: IRIDIUM 39
International designator: 1997-069D
Object number (NORAD): 25042
Object ID (CCSDS): 25042
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 99.344 minutes
Inclination: 86.3915 deg
SMA: 7105.408 km
Apoapsis: 741.254 km
Periapsis: 713.291 km
RAAN: 134.9873 deg
Eccentricy: 0.0019677
Argument of periapsis: 74.7532 deg
Mean anomaly: 285.5846 deg
Mean motion: 14.49503504 rev/day
Mean motion (dot): 0.00001248 rev/day2
B* drag term: 0.00031973 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 7:26 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 11, 2025, 9:50 p.m. UTC
TLE line 0: 0 IRIDIUM 39
TLE line 1: 1 25042U 97069D 25345.91026174 .00001248 00000-0 31973-3 0 9994
TLE line 2: 2 25042 86.3915 134.9873 0019677 74.7532 285.5846 14.49503504474705
Live tracking on map
Real-time ground track for satellite IRIDIUM 39.
In-orbit conjunctions
There are no conjunctions computed for IRIDIUM 39, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Iridium provides global mobile telecommunications services using a constellation of 66 low earth orbit satellites in a 86.4° inclined orbit. Although 77 satellites were originally envisioned for the system and spawned the name based on the 77th element in the periodic table, the system has been scaled back. Motorola's Satellite Communications Group designed and manufactured the Iridium satellites with Lockheed Martin providing the LM-700A spacecraft buses.
IRIDIUM 39 was lifted into orbit during the mission ‘Delta II | Iridium 38 to 43’, on board a Delta II space rocket.
The launch took place on Nov. 9, 1997, 1:34 a.m. from Space Launch Complex 2W.
For more information about the launch, click the button.
Delta II | Iridium 38 to 43
Agency: N/A
Status: Launch Successful
Launch date: Nov. 9, 1997, 1:34 a.m. UTC
Rocket: Delta II
Launch pad: Space Launch Complex 2W
Location: Vandenberg SFB, CA, USA
...
Latest news about this satellite
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