Key statistics
Satellite ARGOS at a glance.
Uptime
9790
Days in orbit
Revolutions
≈ 14.2
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
98.5
Latest
Satellite identification and parameters
Extended collection of information and parameters for ARGOS.
Object identification
Identified? True
Debris? False
Object name: ARGOS
International designator: 1999-008A
Object number (NORAD): 25634
Object ID (CCSDS): 25634
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 101.413 minutes
Inclination: 98.4873 deg
SMA: 7203.684 km
Apoapsis: 832.297 km
Periapsis: 818.801 km
RAAN: 314.5884 deg
Eccentricy: 0.00093673
Argument of periapsis: 217.5017 deg
Mean anomaly: 142.5507 deg
Mean motion: 14.19942515 rev/day
Mean motion (dot): 0.00000161 rev/day2
B* drag term: 0.000095511884 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 10:14 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 12, 2025, 4:28 a.m. UTC
TLE line 0: 0 ARGOS
TLE line 1: 1 25634U 99008A 25346.18670041 .00000161 00000-0 95512-4 0 9997
TLE line 2: 2 25634 98.4873 314.5884 0009367 217.5017 142.5507 14.19942515387768
Live tracking on map
Real-time ground track for satellite ARGOS.
In-orbit conjunctions
A list of the most updated potential collisions computed for object ARGOS.
Associated space launch
ARGOS (Advanced Research & Global Observation Satellite) is a testbed and demonstration program for advanced remote sensing technologies for the US Air Force's Space Test Program (STP). ARGOS's primary objective is to fly and operate advanced payloads that include two technology demonstrations and seven experiment payloads for global and celestial observation. ARGOS also has a goal of three years of on orbit operations to demonstrate and collect science data for the Earth's global environment and top priority military space programs.
ARGOS was lifted into orbit during the mission ‘Delta II | ARGOS’, on board a Delta II space rocket.
The launch took place on Feb. 23, 1999, 10:29 a.m. from Space Launch Complex 2W.
For more information about the launch, click the button.
Delta II | ARGOS
Agency: N/A
Status: Launch Successful
Launch date: Feb. 23, 1999, 10:29 a.m. UTC
Rocket: Delta II
Launch pad: Space Launch Complex 2W
Location: Vandenberg SFB, CA, USA
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