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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 src="https://www.satcat.com/sats-embedded/2142?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

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: 8 hours ago

TLE from 8 hours ago

0 OAO 1
1 02142U 66031A   26104.84867243  .00000063  00000-0  28781-4 0  9999
2 02142  35.0467 316.5024 0006701 165.9011 194.1865 14.34683175141983

Epoch: 2026-04-14T20:22Z

TLE epoch observation values (Epoch: 2026-04-14T20:22:05.297Z)

Latitude

-0°

Longitude

167.96129°

Altitude

779.721 km

Speed

7.464 km/s

True Right ascension

21h 06m 00s

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

11:24:03

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

784.032 km

Perigee altitude

774.44 km

Semi-major axis

7,157.373 km

Eccentricity

0.00067

Inclination

35.0467°

RAAN

316.5024°

Arg. of periapsis

165.9011°

True anomaly

194.1677°

Mean anomaly

194.1865°

Eccentric anomaly

194.1771°

Mean motion

3.58437 °/min

Orbital period

100.44 mins

BSTAR

0.000028781

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

ATLAS AGENA D DEB, 2145 (Decayed)

ATLAS AGENA D R/B, 2144

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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.
5 mins	2026-04-15 16:36:03.699Z	181.924° SSW	2026-04-15 16:39:03.699Z	146.796° SSE	15.08°	2026-04-15 16:41:03.699Z	122.996° SE
8 mins	2026-04-15 18:21:03.699Z	220.466° SW	2026-04-15 18:24:03.699Z	172.069° S	31.116°	2026-04-15 18:29:03.699Z	99.268° ESE
9 mins	2026-04-15 20:06:03.699Z	251.446° W	2026-04-15 20:10:03.699Z	188.783° SSW	37.85°	2026-04-15 20:15:03.699Z	106.926° ESE
8 mins	2026-04-15 21:53:03.699Z	250.477° W	2026-04-15 21:56:03.699Z	199.097° SSW	30.841°	2026-04-15 22:01:03.699Z	130.878° SE
4 mins	2026-04-15 23:40:03.699Z	230.49° WSW	2026-04-15 23:42:03.699Z	205.86° SW	14.448°	2026-04-15 23:44:03.699Z	182.684° SSW

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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: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-04-14T20:22:05.297Z)

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: 8 hours ago