OAO 1, 2142
Orbit data source: Space-Track
OAO 1, 2142 is a payload satellite owned by GSFC (US) in LEO that was launched on Fri, 08 Apr 1966 UTC via an ATLAS SLV-3 AGENA D launch vehicle from the Air Force Eastern Test Range (AFETR). 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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2142 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
Grummann
Mission
Spacecraft
Bus & Motor
OAO, Unknown motor
Mass
1,769 kg wet, 1,769 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 5 hours ago
TLE from 5 hours ago
0 OAO 1
1 2142U 66031A 26198.17640769 -.00000000 00000-0 66500-5 0 9994
2 2142 35.0441 166.3049 0006908 176.1098 183.9644 14.34700883155398Epoch: 2026-07-17T04:14Z
TLE epoch observation values (Epoch: 2026-07-17T04:14:01.624Z)
Latitude
-0.00002°
Longitude
167.79084°
Altitude
779.944 km
Speed
7.463 km/s
True Right ascension
11h 05m 13s
True Declination
0° 00' 00"
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
21:34:41
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
784.122 km
Perigee altitude
774.233 km
Semi-major axis
7,157.314 km
Eccentricity
0.00069
Inclination
35.0441°
RAAN
166.3049°
Arg. of periapsis
176.1098°
True anomaly
183.95893°
Mean anomaly
183.9644°
Eccentric anomaly
183.96167°
Mean motion
3.58441 °/min
Orbital period
100.43 mins
BSTAR
0.00000665
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Other satellites on launch #31 in the year 1966 (1966-04-08 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.OAO 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 | 2026-07-18 00:28:22.130Z | 178.705° S | 2026-07-18 00:30:22.130Z | 155.306° SSE | 15.129° | 2026-07-18 00:33:22.130Z | 119.477° SE |
| 8 mins | 2026-07-18 02:12:22.130Z | 225.27° WSW | 2026-07-18 02:16:22.130Z | 163.244° S | 31.39° | 2026-07-18 02:20:22.130Z | 102.746° ESE |
| 9 mins | 2026-07-18 03:58:22.130Z | 250.033° W | 2026-07-18 04:02:22.130Z | 175.056° S | 37.933° | 2026-07-18 04:07:22.130Z | 106.015° ESE |
| 8 mins | 2026-07-18 05:44:22.130Z | 255.468° W | 2026-07-18 05:48:22.130Z | 190.438° SSW | 30.676° | 2026-07-18 05:52:22.130Z | 134.383° SE |
| 4 mins | 2026-07-18 07:32:22.130Z | 226.474° WSW | 2026-07-18 07:33:22.130Z | 214.2° SW | 14.386° | 2026-07-18 07:36:22.130Z | 179.468° S |
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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