Key statistics
Satellite IRIDIUM 4 at a glance.
Uptime
10394
Days in orbit
Revolutions
≈ 14.4
Per day
Orbit
LEO
Low Earth Orbit
Inclination
86.4
Latest
Satellite identification and parameters
Extended collection of information and parameters for IRIDIUM 4.
Object identification
Identified? True
Debris? False
Object name: IRIDIUM 4
International designator: 1997-020E
Object number (NORAD): 24796
Object ID (CCSDS): 24796
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 100.213 minutes
Inclination: 86.392 deg
SMA: 7146.77 km
Apoapsis: 770.238 km
Periapsis: 767.032 km
RAAN: 121.8638 deg
Eccentricy: 0.00022431
Argument of periapsis: 89.2817 deg
Mean anomaly: 270.8637 deg
Mean motion: 14.36938052 rev/day
Mean motion (dot): 0.00000657 rev/day2
B* drag term: 0.00021526652 1/REarth
Two-line elements (TLE)
Creation date: Oct. 19, 2025, 2:20 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 18, 2025, 11:30 p.m. UTC
TLE line 0: 0 IRIDIUM 4
TLE line 1: 1 24796U 97020E 25291.97945345 .00000657 00000-0 21527-3 0 9999
TLE line 2: 2 24796 86.3920 121.8638 0002243 89.2817 270.8637 14.36938052490246
Live tracking on map
Real-time ground track for satellite IRIDIUM 4.
In-orbit conjunctions
A list of the most updated potential collisions computed for object IRIDIUM 4.
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 4 was lifted into orbit during the mission ‘Delta II | Iridium 04 to 08’, on board a Delta II space rocket.
The launch took place on May 5, 1997, 2:55 p.m. from Space Launch Complex 2W.
For more information about the launch, click the button.
Delta II | Iridium 04 to 08
Agency: N/A
Status: Launch Successful
Launch date: May 5, 1997, 2:55 p.m. UTC
Rocket: Delta II
Launch pad: Space Launch Complex 2W
Location: Vandenberg SFB, CA, USA
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