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
BOX, 0.3 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 TOPO 1
1 04363U 70025B 26237.70886343 -.00000031 00000-0 21519-4 0 9996
2 04363 99.8809 150.6208 0001946 162.5268 226.0618 13.46701385770550Epoch: 2026-08-25T17:00Z
TLE epoch observation values (Epoch: 2026-08-25T17:00:45.800Z)
Latitude
28.15362°
Longitude
-83.86346°
Altitude
1,088.772 km
Speed
7.31 km/s
True Right ascension
09h 41m 11s
True Declination
28° 01' 02"
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
02:31:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,083.186 km
Perigee altitude
1,080.283 km
Semi-major axis
7,459.872 km
Eccentricity
0.00019
Inclination
99.8809°
RAAN
150.6208°
Arg. of periapsis
162.5268°
True anomaly
226.04575°
Mean anomaly
226.0618°
Eccentric anomaly
226.05377°
Mean motion
3.36857 °/min
Orbital period
106.87 mins
BSTAR
0.000021519
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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. |
|---|---|---|---|---|---|---|---|
| 5 mins | 2026-08-26 16:15:15.643Z | 79.209° E | 2026-08-26 16:18:15.643Z | 51.442° ENE | 13.027° | 2026-08-26 16:20:15.643Z | 32.781° NE |
| 11 mins | 2026-08-26 17:57:15.643Z | 154.617° SSE | 2026-08-26 18:02:15.643Z | 74.633° E | 44.097° | 2026-08-26 18:08:15.643Z | 348.896° N |
| 7 mins | 2026-08-26 19:45:15.643Z | 238.373° WSW | 2026-08-26 19:48:15.643Z | 268.746° W | 16.531° | 2026-08-26 19:52:15.643Z | 307.061° NW |
| 11 mins | 2026-08-27 06:55:15.643Z | 23.287° NE | 2026-08-27 07:00:15.643Z | 86.156° E | 42.059° | 2026-08-27 07:06:15.643Z | 183.142° SSW |
| 7 mins | 2026-08-27 08:42:15.643Z | 335.692° NNW | 2026-08-27 08:45:15.643Z | 301.962° NW | 21.047° | 2026-08-27 08:49:15.643Z | 258.853° W |
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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