Key statistics
Satellite TOPO 1 at a glance.
Uptime
20338
Days in orbit
Revolutions
≈ 13.5
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
99.9
Latest
Satellite identification and parameters
Extended collection of information and parameters for TOPO 1.
Object identification
Identified? True
Debris? False
Object name: TOPO 1
International designator: 1970-025B
Object number (NORAD): 4363
Object ID (CCSDS): 4363
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 106.929 minutes
Inclination: 99.8919 deg
SMA: 7462.6 km
Apoapsis: 1086.463 km
Periapsis: 1082.467 km
RAAN: 257.6083 deg
Eccentricy: 0.00026772
Argument of periapsis: 91.9708 deg
Mean anomaly: 29.0402 deg
Mean motion: 13.46689688 rev/day
Mean motion (dot): -0.00000009 rev/day2
B* drag term: 0.000058887212 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 10:14 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 12, 2025, 6:24 a.m. UTC
TLE line 0: 0 TOPO 1
TLE line 1: 1 04363U 70025B 25346.26730159 -.00000009 00000-0 58887-4 0 9993
TLE line 2: 2 04363 99.8919 257.6083 0002677 91.9708 29.0402 13.46689688736035
Live tracking on map
Real-time ground track for satellite TOPO 1.
In-orbit conjunctions
There are no conjunctions computed for TOPO 1, at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
Meteorological research and development satellite
TOPO 1 was lifted into orbit during the mission ‘Thorad SLV-2G Agena D | Nimbus 4’, on board a Thorad SLV-2G Agena D space rocket.
The launch took place on April 8, 1970, 8:17 a.m. from Space Launch Complex 2E.
For more information about the launch, click the button.
Thorad SLV-2G Agena D | Nimbus 4
Agency: N/A
Status: Launch Successful
Launch date: April 8, 1970, 8:17 a.m. UTC
Rocket: Thorad SLV-2G Agena D
Launch pad: Space Launch Complex 2E
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.
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