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: 21 hours ago
TLE from 21 hours ago
0 OAO 1
1 02142U 66031A 25260.35874557 .00000077 00000-0 33742-4 0 9991
2 02142 35.0469 21.6325 0007472 312.8467 47.1593 14.34594969111880Epoch: 2025-09-17T08:36Z
TLE epoch observation values (Epoch: 2025-09-17T08:36:35.617Z)
Latitude
0.00003°
Longitude
-104.0517°
Altitude
771.735 km
Speed
7.472 km/s
True Right ascension
01h 26m 31s
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
22:36:47
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
784.877 km
Perigee altitude
774.181 km
Semi-major axis
7,157.666 km
Eccentricity
0.00075
Inclination
35.0469°
RAAN
21.6325°
Arg. of periapsis
312.8467°
True anomaly
47.22212°
Mean anomaly
47.1593°
Eccentric anomaly
47.19071°
Mean motion
3.58415 °/min
Orbital period
100.44 mins
BSTAR
0.000033742
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-09-18 11:33:38.892Z | 206.578° SW | 2025-09-18 11:37:38.892Z | 148.287° SSE | 24.133° | 2025-09-18 11:41:38.892Z | 101.388° ESE |
| 8 mins | 2025-09-18 13:19:38.892Z | 237.242° WSW | 2025-09-18 13:22:38.892Z | 183.453° SSW | 36.504° | 2025-09-18 13:27:38.892Z | 101.54° ESE |
| 8 mins | 2025-09-18 15:05:38.892Z | 251.89° W | 2025-09-18 15:08:38.892Z | 198.099° SSW | 35.693° | 2025-09-18 15:13:38.892Z | 118.857° SE |
| 7 mins | 2025-09-18 16:51:38.892Z | 246.452° WSW | 2025-09-18 16:54:38.892Z | 204.46° SW | 22.339° | 2025-09-18 16:58:38.892Z | 154.125° SSE |
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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