Key statistics
Satellite SOLRAD 1 (GREB) at a glance.
Uptime
23756
Days in orbit
Revolutions
≈ 14.5
Per day
Orbit
LEO
Low Earth Orbit
Inclination
66.7
Latest
Satellite identification and parameters
Extended collection of information and parameters for SOLRAD 1 (GREB).
Object identification
Identified? True
Debris? False
Object name: SOLRAD 1 (GREB)
International designator: 1960-007B
Object number (NORAD): 46
Object ID (CCSDS): 46
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 99.036 minutes
Inclination: 66.6888 deg
SMA: 7090.687 km
Apoapsis: 853.739 km
Periapsis: 571.364 km
RAAN: 91.1408 deg
Eccentricy: 0.0199117
Argument of periapsis: 195.507 deg
Mean anomaly: 163.9887 deg
Mean motion: 14.54019738 rev/day
Mean motion (dot): 0.0000037 rev/day2
B* drag term: 0.000089206 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, 2:30 a.m. UTC
TLE line 0: 0 SOLRAD 1 (GREB)
TLE line 1: 1 00046U 60007B 25187.10430262 .00000370 00000-0 89206-4 0 9993
TLE line 2: 2 00046 66.6888 91.1408 0199117 195.5070 163.9887 14.54019738406679
Live tracking on map
Real-time ground track for satellite SOLRAD 1 (GREB).
In-orbit conjunctions
A list of the most updated potential collisions computed for object SOLRAD 1 (GREB).
Associated space launch
The Transit system was the first satellite navigation system to be used operationally. The system was primarily used by the U.S. Navy to provide accurate location information to its Polaris ballistic missile submarines, and it was also used as a navigation system by the Navy's surface ships, as well as for hydrographic survey and geodetic surveying.
SOLRAD 1 (GREB) was lifted into orbit during the mission ‘Thor DM-21 Ablestar | Transit 2A’, on board a Thor DM-21 Ablestar space rocket.
The launch took place on June 22, 1960, 5:54 a.m. from Space Launch Complex 17B.
For more information about the launch, click the button.
Thor DM-21 Ablestar | Transit 2A
Agency: N/A
Status: Launch Successful
Launch date: June 22, 1960, 5:54 a.m. UTC
Rocket: Thor DM-21 Ablestar
Launch pad: Space Launch Complex 17B
Location: Cape Canaveral SFS, FL, USA
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