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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Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
Grummann
Mission
Civil Astronomy
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
Oct Cyl + 2 Pan, 3.3 m
Radar Cross Section
9.480 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 19 hours ago
TLE from 19 hours ago
0 OAO 1
1 02142U 66031A 25258.06193030 .00000049 00000-0 24000-4 0 9992
2 02142 35.0466 34.1862 0007585 296.2428 63.7480 14.34594538111554Epoch: 2025-09-15T01:29Z
TLE epoch observation values (Epoch: 2025-09-15T01:29:10.777Z)
Latitude
-0.00002°
Longitude
17.61929°
Altitude
772.972 km
Speed
7.471 km/s
True Right ascension
02h 16m 44s
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
12:50:40
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
784.96 km
Perigee altitude
774.101 km
Semi-major axis
7,157.667 km
Eccentricity
0.00076
Inclination
35.0466°
RAAN
34.1862°
Arg. of periapsis
296.2428°
True anomaly
63.82599°
Mean anomaly
63.748°
Eccentric anomaly
63.78699°
Mean motion
3.58415 °/min
Orbital period
100.44 mins
BSTAR
0.000024
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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 | 2025-09-16 12:48:59.107Z | 211.316° SW | 2025-09-16 12:51:59.107Z | 163.663° S | 28.131° | 2025-09-16 12:55:59.107Z | 104.434° ESE |
| 9 mins | 2025-09-16 14:33:59.107Z | 246.452° WSW | 2025-09-16 14:37:59.107Z | 176.292° S | 37.757° | 2025-09-16 14:42:59.107Z | 103.032° ESE |
| 9 mins | 2025-09-16 16:19:59.107Z | 256.714° W | 2025-09-16 16:23:59.107Z | 191.215° SSW | 33.714° | 2025-09-16 16:28:59.107Z | 123.835° SE |
| 6 mins | 2025-09-16 18:06:59.107Z | 241.165° WSW | 2025-09-16 18:09:59.107Z | 201.595° SSW | 18.291° | 2025-09-16 18:12:59.107Z | 166.332° 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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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