Key statistics
Satellite TRANSIT 2A at a glance.
Uptime
23756
Days in orbit
Revolutions
≈ 14.4
Per day
Orbit
LEO
Low Earth Orbit
Inclination
66.7
Latest
Satellite identification and parameters
Extended collection of information and parameters for TRANSIT 2A.
Object identification
Identified? True
Debris? False
Object name: TRANSIT 2A
International designator: 1960-007A
Object number (NORAD): 45
Object ID (CCSDS): 45
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 100.309 minutes
Inclination: 66.6918 deg
SMA: 7151.315 km
Apoapsis: 947.483 km
Periapsis: 598.877 km
RAAN: 194.6458 deg
Eccentricy: 0.0243736
Argument of periapsis: 50.4435 deg
Mean anomaly: 311.7923 deg
Mean motion: 14.35568419 rev/day
Mean motion (dot): 0.00000268 rev/day2
B* drag term: 0.000092728 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, 9:03 a.m. UTC
TLE line 0: 0 TRANSIT 2A
TLE line 1: 1 00045U 60007A 25187.37761378 .00000268 00000-0 92728-4 0 9995
TLE line 2: 2 00045 66.6918 194.6458 0243736 50.4435 311.7923 14.35568419330402
Live tracking on map
Real-time ground track for satellite TRANSIT 2A.
In-orbit conjunctions
A list of the most updated potential collisions computed for object TRANSIT 2A.
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.
TRANSIT 2A 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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