Key statistics
Satellite IRIDIUM 73 at a glance.
Uptime
9912
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 73.
Object identification
Identified? True
Debris? False
Object name: IRIDIUM 73
International designator: 1998-032C
Object number (NORAD): 25344
Object ID (CCSDS): 25344
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 99.192 minutes
Inclination: 86.44 deg
SMA: 7098.141 km
Apoapsis: 721.166 km
Periapsis: 718.846 km
RAAN: 38.9928 deg
Eccentricy: 0.0001634
Argument of periapsis: 78.8084 deg
Mean anomaly: 281.3305 deg
Mean motion: 14.51729916 rev/day
Mean motion (dot): 0.00000387 rev/day2
B* drag term: 0.00009128 1/REarth
Two-line elements (TLE)
Creation date: July 5, 2025, 5:45 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 5, 2025, 2:29 p.m. UTC
TLE line 0: 0 IRIDIUM 73
TLE line 1: 1 25344U 98032C 25186.60348647 .00000387 00000-0 91280-4 0 9992
TLE line 2: 2 25344 86.4400 38.9928 0001634 78.8084 281.3305 14.51729916433232
Live tracking on map
Real-time ground track for satellite IRIDIUM 73.
In-orbit conjunctions
A list of the most updated potential collisions computed for object IRIDIUM 73.
Associated 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 73 was lifted into orbit during the mission ‘Delta II | Iridium 70, 72 to 75’, on board a Delta II space rocket.
The launch took place on May 17, 1998, 9:16 p.m. from Space Launch Complex 2W.
For more information about the launch, click the button.
Delta II | Iridium 70, 72 to 75
Agency: N/A
Status: Launch Successful
Launch date: May 17, 1998, 9:16 p.m. UTC
Rocket: Delta II
Launch pad: Space Launch Complex 2W
Location: Vandenberg SFB, CA, USA
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