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: 19 hours ago
TLE from 19 hours ago
0 OAO 1
1 2142U 66031A 26209.10283272 .00000096 00000-0 40325-4 0 9992
2 2142 35.0454 106.5720 0007584 257.2706 102.7134 14.34702699156966Epoch: 2026-07-28T02:28Z
TLE epoch observation values (Epoch: 2026-07-28T02:28:04.747Z)
Latitude
0°
Longitude
123.77536°
Altitude
776.207 km
Speed
7.467 km/s
True Right ascension
07h 06m 17s
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
11:20:42
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
784.599 km
Perigee altitude
773.743 km
Semi-major axis
7,157.308 km
Eccentricity
0.00076
Inclination
35.0454°
RAAN
106.572°
Arg. of periapsis
257.2706°
True anomaly
102.79816°
Mean anomaly
102.7134°
Eccentric anomaly
102.75578°
Mean motion
3.58442 °/min
Orbital period
100.43 mins
BSTAR
0.000040325
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-07-28 22:49:52.372Z | 247.182° WSW | 2026-07-28 22:53:52.372Z | 191.319° SSW | 37.163° | 2026-07-28 22:58:52.372Z | 103.81° ESE |
| 8 mins | 2026-07-29 00:36:52.372Z | 252.907° W | 2026-07-29 00:39:52.372Z | 202.951° SW | 33.936° | 2026-07-29 00:44:52.372Z | 124.146° SE |
| 5 mins | 2026-07-29 02:23:52.372Z | 234.986° WSW | 2026-07-29 02:25:52.372Z | 207.162° SW | 19.211° | 2026-07-29 02:28:52.372Z | 168.572° S |
| 7 mins | 2026-07-29 20:27:52.372Z | 204.042° SW | 2026-07-29 20:30:52.372Z | 157.822° S | 25.585° | 2026-07-29 20:34:52.372Z | 104.083° ESE |
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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