TOPO 1, 4363
Orbit data source: Space-Track
TOPO 1, 4363 is a payload satellite owned by USA ETL (US) in SSO that was launched on Wed, 08 Apr 1970 UTC via a THORAD SLV-2G AGENA D launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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4363 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
ITT
Mission
Spacecraft
Bus & Motor
SECOR, Unknown motor
Mass
18 kg wet, 18 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 14 hours ago
TLE from 14 hours ago
0 TOPO 1
1 04363U 70025B 26084.54741291 -.00000024 00000-0 33393-4 0 9995
2 04363 99.8907 359.5336 0001754 178.7973 0.7702 13.46695745749931Epoch: 2026-03-25T13:08Z
TLE epoch observation values (Epoch: 2026-03-25T13:08:16.475Z)
Latitude
0.31619°
Longitude
159.51066°
Altitude
1,085.865 km
Speed
7.31 km/s
True Right ascension
11h 58m 21s
True Declination
0° 18' 52"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
08:23:17
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,083.065 km
Perigee altitude
1,080.448 km
Semi-major axis
7,459.893 km
Eccentricity
0.00018
Inclination
99.8907°
RAAN
359.5336°
Arg. of periapsis
178.7973°
True anomaly
0.77047°
Mean anomaly
0.7702°
Eccentric anomaly
0.77034°
Mean motion
3.36856 °/min
Orbital period
106.87 mins
BSTAR
0.000033393
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Other satellites on launch #25 in the year 1970 (1970-04-08 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.TOPO 1 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 12 mins | 2026-03-26 06:40:25.152Z | 25.765° NE | 2026-03-26 06:46:25.152Z | 95.275° ESE | 38.056° | 2026-03-26 06:52:25.152Z | 174.631° S |
| 9 mins | 2026-03-26 08:27:25.152Z | 346.123° N | 2026-03-26 08:31:25.152Z | 300.855° NW | 25.161° | 2026-03-26 08:36:25.152Z | 245.725° WSW |
| 9 mins | 2026-03-26 16:56:25.152Z | 107.191° ESE | 2026-03-26 17:00:25.152Z | 59.661° ENE | 24.796° | 2026-03-26 17:05:25.152Z | 8.306° NNE |
| 11 mins | 2026-03-26 18:40:25.152Z | 187.973° SSW | 2026-03-26 18:45:25.152Z | 263.945° W | 38.53° | 2026-03-26 18:51:25.152Z | 334.549° NNW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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