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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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Iframe URL

https://www.satcat.com/sats-embedded/2142?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

2142, 1966-031A

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Grummann

Mission

Spacecraft

Bus & Motor

OAO, Unknown motor

Mass

1,769 kg wet, 1,769 kg dry

Launch date (UTC)

1966-04-08 (60 years ago)

Launch vehicle

ATLAS SLV-3 AGENA D

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 14 hours ago

TLE from 14 hours ago

0 OAO 1
1 02142U 66031A   26041.09824464  .00000179  00000-0  69375-4 0  9996
2 02142  35.0464 304.9998 0006546  13.7120 346.3745 14.34663600132821

Epoch: 2026-02-10T02:21Z

TLE epoch observation values (Epoch: 2026-02-10T02:21:28.336Z)

Latitude

-0°

Longitude

129.44814°

Altitude

770.589 km

Speed

7.473 km/s

True Right ascension

20h 19m 59s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

18:50:49

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

783.986 km

Perigee altitude

774.616 km

Semi-major axis

7,157.438 km

Eccentricity

0.00065

Inclination

35.0464°

RAAN

304.9998°

Arg. of periapsis

13.712°

True anomaly

346.35682°

Mean anomaly

346.3745°

Eccentric anomaly

346.36566°

Mean motion

3.58432 °/min

Orbital period

100.44 mins

BSTAR

0.000069375

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Other satellites on launch #31 in the year 1966 (1966-04-08 UTC)

ATLAS AGENA D R/B, 2144

ATLAS AGENA D DEB, 2145 (Decayed)

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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.

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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	2026-02-10 20:56:14.598Z	211.516° SW	2026-02-10 21:00:14.598Z	163.851° S	23.447°	2026-02-10 21:04:14.598Z	107.622° ESE
9 mins	2026-02-10 22:42:14.598Z	240.947° WSW	2026-02-10 22:46:14.598Z	177.294° S	36.344°	2026-02-10 22:51:14.598Z	100.636° ESE
9 mins	2026-02-11 00:28:14.598Z	256.606° W	2026-02-11 00:32:14.598Z	191.988° SSW	36.071°	2026-02-11 00:37:14.598Z	117.199° SE
7 mins	2026-02-11 02:15:14.598Z	245.148° WSW	2026-02-11 02:18:14.598Z	201.047° SSW	22.906°	2026-02-11 02:22:14.598Z	151.587° SSE

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out OAO 1, 2142 on other resources

View OAO 1, 2142 on NASA - NSSDCA Website

View OAO 1, 2142 on Heavens-Above

View OAO 1, 2142 on Keep Track

View OAO 1, 2142 on Celestrak

View OAO 1, 2142 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

OAO 1, 2142

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 14 hours ago

TLE from 14 hours ago

TLE epoch observation values (Epoch: 2026-02-10T02:21:28.336Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #31 in the year 1966 (1966-04-08 UTC)

OAO 1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out OAO 1, 2142 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 14 hours ago