IRIDIUM 4

Satellite information

Favourite Embed

Satellite Type and Status

PAYLOADIN ORBIT

Key statistics

Satellite IRIDIUM 4 at a glance.

Uptime

10289

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: 100.219 minutes

Inclination: 86.3985 deg

SMA: 7147.057 km

Apoapsis: 770.656 km

Periapsis: 767.188 km

RAAN: 166.1201 deg

Eccentricy: 0.0002426

Argument of periapsis: 89.1895 deg

Mean anomaly: 270.958 deg

Mean motion: 14.36851419 rev/day

Mean motion (dot): 0.0000028 rev/day2

B* drag term: 0.000088116 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, 11:26 a.m. UTC

TLE line 0: 0 IRIDIUM 4

TLE line 1: 1 24796U 97020E 25186.47642661 .00000280 00000-0 88116-4 0 9992

TLE line 2: 2 24796 86.3985 166.1201 0002426 89.1895 270.9580 14.36851419475098

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.

Target Orbit TCA Probability of collision Miss distance Type
CZ-6A DEB LEO 2025-05-24 04:30:23 0.0001070858 854.0 (m) DEBRIS
COSMOS 676 LEO 2025-02-11 00:29:36 0.0003113934 169.0 (m) PAYLOAD
COSMOS 1818 COOLANT LEO 2024-12-19 23:41:05 0.0004949293 922.0 (m) DEBRIS
RESURS O1 DEB SSO 2024-09-06 07:27:54 0.001060241 262.0 (m) DEBRIS
FENGYUN 1C DEB SSO 2024-08-20 09:00:14 0.0001575369 896.0 (m) DEBRIS

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.

Launch to space Delta II | Iridium 04 to 08
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

...

Latest news about this satellite

There are no fresh news available about this satellite. Check back as we update our databases every day.


Newsletter sign-up

Weekly statistics, charts and insights to help you stay on top of the space industry.