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: 8 hours ago
TLE from 8 hours ago
0 TOPO 1
1 4363U 70025B 25298.50713794 -.00000004 00000-0 67619-4 0 9990
2 4363 99.8878 210.4798 0001611 190.6389 342.5204 13.46686078729606Epoch: 2025-10-25T12:10Z
TLE epoch observation values (Epoch: 2025-10-25T12:10:16.718Z)
Latitude
6.67241°
Longitude
174.93588°
Altitude
1,085.487 km
Speed
7.31 km/s
True Right ascension
02h 06m 34s
True Declination
6° 38' 04"
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
15:51:10
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,082.993 km
Perigee altitude
1,080.59 km
Semi-major axis
7,459.929 km
Eccentricity
0.00016
Inclination
99.8878°
RAAN
210.4798°
Arg. of periapsis
190.6389°
True anomaly
342.51485°
Mean anomaly
342.5204°
Eccentric anomaly
342.51763°
Mean motion
3.36854 °/min
Orbital period
106.87 mins
BSTAR
0.000067619
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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 | 2025-10-26 05:46:43.743Z | 50.933° ENE | 2025-10-26 05:50:43.743Z | 90.467° ESE | 18.398° | 2025-10-26 05:54:43.743Z | 131.325° SE |
| 11 mins | 2025-10-26 07:31:43.743Z | 7.576° NNE | 2025-10-26 07:36:43.743Z | 290.449° WNW | 42.933° | 2025-10-26 07:42:43.743Z | 208.324° SW |
| 11 mins | 2025-10-26 17:44:43.743Z | 147.07° SSE | 2025-10-26 17:49:43.743Z | 83.207° E | 41.572° | 2025-10-26 17:55:43.743Z | 352.917° N |
| 7 mins | 2025-10-26 19:32:43.743Z | 232.738° WSW | 2025-10-26 19:35:43.743Z | 266.046° W | 20.041° | 2025-10-26 19:39:43.743Z | 308.23° NW |
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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