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: 12 hours ago
TLE from 12 hours ago
0 OAO 1
1 02142U 66031A 26258.86323414 .00000047 00000-0 23162-4 0 9998
2 02142 35.0449 194.5406 0007428 285.2679 74.7187 14.34709066164112Epoch: 2026-09-15T20:43Z
TLE epoch observation values (Epoch: 2026-09-15T20:43:03.429Z)
Latitude
-0.00004°
Longitude
-111.04682°
Altitude
773.591 km
Speed
7.47 km/s
True Right ascension
12h 58m 09s
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
01:40:51
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
784.467 km
Perigee altitude
773.834 km
Semi-major axis
7,157.287 km
Eccentricity
0.00074
Inclination
35.0449°
RAAN
194.5406°
Arg. of periapsis
285.2679°
True anomaly
74.80083°
Mean anomaly
74.7187°
Eccentric anomaly
74.75976°
Mean motion
3.58443 °/min
Orbital period
100.43 mins
BSTAR
0.000023162
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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 | 2026-09-16 23:42:00.891Z | 211.529° SW | 2026-09-16 23:45:00.891Z | 160.519° S | 33.812° | 2026-09-16 23:49:00.891Z | 102.919° ESE |
| 9 mins | 2026-09-17 01:27:00.891Z | 246.904° WSW | 2026-09-17 01:31:00.891Z | 170.625° S | 51.48° | 2026-09-17 01:36:00.891Z | 102.897° ESE |
| 8 mins | 2026-09-17 03:13:00.891Z | 256.034° W | 2026-09-17 03:17:00.891Z | 187.134° SSW | 41.236° | 2026-09-17 03:21:00.891Z | 128.546° SE |
| 6 mins | 2026-09-17 05:00:00.891Z | 239.189° WSW | 2026-09-17 05:02:00.891Z | 213.885° SW | 18.675° | 2026-09-17 05:06:00.891Z | 166.012° 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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