Key statistics
Satellite SCOUT G-1 R/B at a glance.
Uptime
12531
Days in orbit
Revolutions
≈ 14.3
Per day
Orbit
LEO
Low Earth Orbit
Inclination
89.5
Latest
Satellite identification and parameters
Extended collection of information and parameters for SCOUT G-1 R/B.
Object identification
Identified? True
Debris? False
Object name: SCOUT G-1 R/B
International designator: 1991-045B
Object number (NORAD): 21528
Object ID (CCSDS): 21528
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 100.879 minutes
Inclination: 89.5231 deg
SMA: 7178.395 km
Apoapsis: 846.287 km
Periapsis: 754.234 km
RAAN: 273.4245 deg
Eccentricy: 0.0064118
Argument of periapsis: 291.037 deg
Mean anomaly: 121.5733 deg
Mean motion: 14.27452662 rev/day
Mean motion (dot): 0.00000654 rev/day2
B* drag term: 0.00025592239 1/REarth
Two-line elements (TLE)
Creation date: Oct. 18, 2025, 2:17 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 17, 2025, 10:52 p.m. UTC
TLE line 0: 0 SCOUT G-1 R/B
TLE line 1: 1 21528U 91045B 25290.95319704 .00000654 00000-0 25592-3 0 9994
TLE line 2: 2 21528 89.5231 273.4245 0064118 291.0370 121.5733 14.27452662783006
Live tracking on map
Real-time ground track for satellite SCOUT G-1 R/B.
In-orbit conjunctions
A list of the most updated potential collisions computed for object SCOUT G-1 R/B.
Associated space launch
REX (Radiation Experiment) or ISES (Integrated Space Experiment System) was an Air Force Rome Laboratory ionospheric research satellite which tested the effects of the atmosphere on radio transmissions, and employed GPS for on-board navigation and attitude control.
SCOUT G-1 R/B was lifted into orbit during the mission ‘Scout G-1 | REX’, on board a Scout G-1 space rocket.
The launch took place on June 29, 1991, 2 p.m. from Space Launch Complex 5.
For more information about the launch, click the button.
Scout G-1 | REX
Agency: N/A
Status: Launch Successful
Launch date: June 29, 1991, 2 p.m. UTC
Rocket: Scout G-1
Launch pad: Space Launch Complex 5
Location: Vandenberg SFB, CA, USA
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