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: 13 hours ago
TLE from 13 hours ago
0 OAO 1
1 2142U 66031A 26131.08634458 .00000072 00000-0 31959-4 0 9996
2 2142 35.0440 173.0689 0006915 0.7155 359.3541 14.34688561145758Epoch: 2026-05-11T02:04Z
TLE epoch observation values (Epoch: 2026-05-11T02:04:20.171Z)
Latitude
-0.00006°
Longitude
-86.89535°
Altitude
770.11 km
Speed
7.474 km/s
True Right ascension
11h 32m 16s
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
23:19:59
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
784.168 km
Perigee altitude
774.269 km
Semi-major axis
7,157.355 km
Eccentricity
0.00069
Inclination
35.044°
RAAN
173.0689°
Arg. of periapsis
0.7155°
True anomaly
359.35321°
Mean anomaly
359.3541°
Eccentric anomaly
359.35365°
Mean motion
3.58438 °/min
Orbital period
100.44 mins
BSTAR
0.000031959
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-05-12 06:43:48.977Z | 213.12° SW | 2026-05-12 06:46:48.977Z | 161.131° S | 29.481° | 2026-05-12 06:50:48.977Z | 102.923° ESE |
| 9 mins | 2026-05-12 08:28:48.977Z | 247.59° W | 2026-05-12 08:32:48.977Z | 171.241° S | 37.8° | 2026-05-12 08:37:48.977Z | 103.864° ESE |
| 8 mins | 2026-05-12 10:14:48.977Z | 255.564° W | 2026-05-12 10:18:48.977Z | 187.426° SSW | 32.379° | 2026-05-12 10:22:48.977Z | 130.247° SE |
| 5 mins | 2026-05-12 12:01:48.977Z | 238.241° WSW | 2026-05-12 12:03:48.977Z | 213.493° SW | 16.631° | 2026-05-12 12:06:48.977Z | 176.187° S |
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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