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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Edit Public Description
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: 16 hours ago
TLE from 16 hours ago
0 TOPO 1
1 4363U 70025B 26036.74335731 -.00000006 00000-0 64318-4 0 9993
2 4363 99.8927 312.3613 0001623 339.9129 37.9845 13.46693128743507Epoch: 2026-02-05T17:50Z
TLE epoch observation values (Epoch: 2026-02-05T17:50:26.071Z)
Latitude
17.62522°
Longitude
-94.2984°
Altitude
1,085.696 km
Speed
7.311 km/s
True Right ascension
20h 36m 48s
True Declination
17° 31' 50"
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
12:08:31
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,082.977 km
Perigee altitude
1,080.555 km
Semi-major axis
7,459.903 km
Eccentricity
0.00016
Inclination
99.8927°
RAAN
312.3613°
Arg. of periapsis
339.9129°
True anomaly
37.99595°
Mean anomaly
37.9845°
Eccentric anomaly
37.99022°
Mean motion
3.36855 °/min
Orbital period
106.87 mins
BSTAR
0.000064318
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Other satellites on launch #25 in the year 1970 (1970-04-08 UTC)
Did you know?
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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-02-06 17:03:46.361Z | 122.299° SE | 2026-02-06 17:09:46.361Z | 55.109° ENE | 27.61° | 2026-02-06 17:14:46.361Z | 4.839° NNE |
| 10 mins | 2026-02-06 18:49:46.361Z | 195.587° SSW | 2026-02-06 18:54:46.361Z | 269.202° W | 34.999° | 2026-02-06 18:59:46.361Z | 328.688° NNW |
| 9 mins | 2026-02-07 06:02:46.361Z | 47.805° ENE | 2026-02-07 06:06:46.361Z | 92.367° ESE | 23.568° | 2026-02-07 06:11:46.361Z | 146.145° SSE |
| 11 mins | 2026-02-07 07:47:46.361Z | 0.804° NNE | 2026-02-07 07:52:46.361Z | 284.684° WNW | 38.542° | 2026-02-07 07:58:46.361Z | 217.379° SW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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