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: 9 hours ago
TLE from 9 hours ago
0 TOPO 1
1 04363U 70025B 26183.27252492 -.00000017 00000-0 45639-4 0 9993
2 04363 99.8868 96.9362 0001616 343.5747 144.4540 13.46699860763222Epoch: 2026-07-02T06:32Z
TLE epoch observation values (Epoch: 2026-07-02T06:32:26.153Z)
Latitude
50.9833°
Longitude
-89.1332°
Altitude
1,093.483 km
Speed
7.31 km/s
True Right ascension
19h 17m 10s
True Declination
50° 49' 21"
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
03:14:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,082.946 km
Perigee altitude
1,080.535 km
Semi-major axis
7,459.878 km
Eccentricity
0.00016
Inclination
99.8868°
RAAN
96.9362°
Arg. of periapsis
343.5747°
True anomaly
144.46476°
Mean anomaly
144.454°
Eccentric anomaly
144.45938°
Mean motion
3.36857 °/min
Orbital period
106.87 mins
BSTAR
0.000045639
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-07-02 16:46:13.276Z | 102.778° ESE | 2026-07-02 16:50:13.276Z | 59.815° ENE | 21.548° | 2026-07-02 16:54:13.276Z | 17.069° NNE |
| 11 mins | 2026-07-02 18:30:13.276Z | 180.172° SSW | 2026-07-02 18:35:13.276Z | 266.401° W | 41.787° | 2026-07-02 18:41:13.276Z | 338° N |
| 7 mins | 2026-07-03 05:44:13.276Z | 59.327° ENE | 2026-07-03 05:47:13.276Z | 89.653° E | 17.011° | 2026-07-03 05:51:13.276Z | 129.075° SE |
| 11 mins | 2026-07-03 07:28:13.276Z | 9.598° NNE | 2026-07-03 07:33:13.276Z | 297.233° NW | 43.81° | 2026-07-03 07:39:13.276Z | 205.489° SW |
| 4 mins | 2026-07-03 09:16:13.276Z | 319.405° NNW | 2026-07-03 09:17:13.276Z | 309.926° NW | 12.655° | 2026-07-03 09:20:13.276Z | 282.273° WNW |
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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