Key statistics
Satellite STEX at a glance.
Uptime
9774
Days in orbit
Revolutions
≈ 14.5
Per day
Orbit
LEO
Low Earth Orbit
Inclination
85.0
Latest
Satellite identification and parameters
Extended collection of information and parameters for STEX.
Object identification
Identified? True
Debris? False
Object name: STEX
International designator: 1998-055A
Object number (NORAD): 25489
Object ID (CCSDS): 25489
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 99.217 minutes
Inclination: 84.9836 deg
SMA: 7099.335 km
Apoapsis: 728.975 km
Periapsis: 713.426 km
RAAN: 181.85 deg
Eccentricy: 0.0010951
Argument of periapsis: 115.9293 deg
Mean anomaly: 244.304 deg
Mean motion: 14.51363628 rev/day
Mean motion (dot): 0.00000462 rev/day2
B* drag term: 0.00011056 1/REarth
Two-line elements (TLE)
Creation date: July 6, 2025, 6:05 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 6, 2025, 11:41 a.m. UTC
TLE line 0: 0 STEX
TLE line 1: 1 25489U 98055A 25187.48699186 .00000462 00000-0 11056-3 0 9997
TLE line 2: 2 25489 84.9836 181.8500 0010951 115.9293 244.3040 14.51363628413180
Live tracking on map
Real-time ground track for satellite STEX.
In-orbit conjunctions
A list of the most updated potential collisions computed for object STEX.
Associated space launch
The STEX (Space Technology Experiments) satellite carried 29 new technologies intended to result in lower cost and higher performance spacecraft for future missions.
STEX was lifted into orbit during the mission ‘Minotaur | NROL-8’, on board a Minotaur space rocket.
The launch took place on Oct. 3, 1998, 10:04 a.m. from Space Launch Complex 576E.
For more information about the launch, click the button.
Minotaur | NROL-8
Agency: N/A
Status: Launch Successful
Launch date: Oct. 3, 1998, 10:04 a.m. UTC
Rocket: Minotaur
Launch pad: Space Launch Complex 576E
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.
