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
OCT CYL + 2 PAN, 3.3 m
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 OAO 1
1 02142U 66031A 26311.26799479 .00000083 00000-0 35771-4 0 9999
2 02142 35.0456 268.0489 0006990 334.1921 25.8418 14.34716975171642Epoch: 2026-11-07T06:25Z
TLE epoch observation values (Epoch: 2026-11-07T06:25:54.749Z)
Latitude
0.00001°
Longitude
125.09511°
Altitude
770.462 km
Speed
7.473 km/s
True Right ascension
17h 52m 11s
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
11:25:20
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
784.127 km
Perigee altitude
774.121 km
Semi-major axis
7,157.261 km
Eccentricity
0.0007
Inclination
35.0456°
RAAN
268.0489°
Arg. of periapsis
334.1921°
True anomaly
25.87674°
Mean anomaly
25.8418°
Eccentric anomaly
25.85927°
Mean motion
3.58445 °/min
Orbital period
100.43 mins
BSTAR
0.000035771
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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 | 2026-11-08 01:02:27.118Z | 211.141° SW | 2026-11-08 01:05:27.118Z | 169.365° S | 29.776° | 2026-11-08 01:10:27.118Z | 100.542° ESE |
| 8 mins | 2026-11-08 02:48:27.118Z | 240.938° WSW | 2026-11-08 02:51:27.118Z | 186.968° SSW | 49.74° | 2026-11-08 02:56:27.118Z | 102.584° ESE |
| 8 mins | 2026-11-08 04:34:27.118Z | 252.561° W | 2026-11-08 04:37:27.118Z | 199.824° SSW | 44.041° | 2026-11-08 04:42:27.118Z | 122.045° SE |
| 7 mins | 2026-11-08 06:20:27.118Z | 245.421° WSW | 2026-11-08 06:23:27.118Z | 205.432° SW | 21.722° | 2026-11-08 06:27:27.118Z | 157.862° 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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