Key statistics
Satellite TRANSIT 4B at a glance.
Uptime
23353
Days in orbit
Revolutions
≈ 13.6
Per day
Orbit
LEO
Low Earth Orbit
Inclination
32.4
Latest
Satellite identification and parameters
Extended collection of information and parameters for TRANSIT 4B.
Object identification
Identified? True
Debris? False
Object name: TRANSIT 4B
International designator: 1961-031A
Object number (NORAD): 202
Object ID (CCSDS): 202
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 105.59 minutes
Inclination: 32.4364 deg
SMA: 7400.173 km
Apoapsis: 1096.944 km
Periapsis: 947.133 km
RAAN: 116.3577 deg
Eccentricy: 0.0101221
Argument of periapsis: 204.2205 deg
Mean anomaly: 155.3634 deg
Mean motion: 13.63766192 rev/day
Mean motion (dot): 0.00000116 rev/day2
B* drag term: 0.00011056 1/REarth
Two-line elements (TLE)
Creation date: Oct. 21, 2025, 11:56 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 21, 2025, 7:03 p.m. UTC
TLE line 0: 0 TRANSIT 4B
TLE line 1: 1 202U 61031A 25294.79444174 .00000116 00000-0 11056-3 0 9991
TLE line 2: 2 202 32.4364 116.3577 0101221 204.2205 155.3634 13.63766192188435
Live tracking on map
Real-time ground track for satellite TRANSIT 4B.
Associated space launch
TRANSIT 4B was lifted into orbit during the mission ‘Thor DM-21 Ablestar | Transit 4B & TRAAC’, on board a Thor DM-21 Ablestar space rocket.
The launch took place on Nov. 15, 1961, 10:26 p.m. from Space Launch Complex 17B.
For more information about the launch, click the button.
Thor DM-21 Ablestar | Transit 4B & TRAAC
Agency: N/A
Status: Launch Successful
Launch date: Nov. 15, 1961, 10:26 p.m. UTC
Rocket: Thor DM-21 Ablestar
Launch pad: Space Launch Complex 17B
Location: Cape Canaveral SFS, FL, USA
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