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OPS 1920, 2481

Orbit data source: Space-Track

OPS 1920, 2481 is a payload satellite owned by USAF SSD (US) in LEO that was launched on Wed, 05 Oct 1966 UTC via an ATLAS SLV-3 AGENA D launch vehicle from the Air Force Western Test Range (AFWTR). 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/2481?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/2481?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

2481, 1966-089A

Orbit

LEO

Country

Related business

United States Space Force (US)

Manufacturer

LMSC

Mission

Spacecraft

Bus & Motor

MIDAS, Unknown motor

Mass

~2,000 kg wet, ~1,000 kg dry

Launch date (UTC)

1966-10-05 (59 years ago)

Launch vehicle

ATLAS SLV-3 AGENA D

Launch site

Air Force Western Test Range (AFWTR)

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 OPS 1920
1  2481U 66089A   25344.53455046  .00000003  00000-0  55631-3 0  9990
2  2481  89.8369  32.4547 0033046 148.8862 211.3954  8.59255013856460

Epoch: 2025-12-10T12:49Z

TLE epoch observation values (Epoch: 2025-12-10T12:49:45.159Z)

Latitude

-0.00001°

Longitude

120.51304°

Altitude

3,721.502 km

Speed

6.274 km/s

True Right ascension

02h 09m 49s

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

01:14:56

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,721.968 km

Perigee altitude

3,655.434 km

Semi-major axis

10,066.838 km

Eccentricity

0.0033

Inclination

89.8369°

RAAN

32.4547°

Arg. of periapsis

148.8862°

True anomaly

211.19882°

Mean anomaly

211.3954°

Eccentric anomaly

211.29704°

Mean motion

2.14884 °/min

Orbital period

167.53 mins

BSTAR

0.00055631

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Other satellites on launch #89 in the year 1966 (1966-10-05 UTC)

SECOR 8 (EGRS 8), 2520

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OPS 1920 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.
30 mins	2025-12-11 02:55:04.873Z	150.093° SSE	2025-12-11 03:07:04.873Z	79.173° E	42.818°	2025-12-11 03:25:04.873Z	1.985° NNE
32 mins	2025-12-11 05:40:04.873Z	226.61° WSW	2025-12-11 05:55:04.873Z	284.679° WNW	30.025°	2025-12-11 06:12:04.873Z	349.756° N
13 mins	2025-12-11 12:04:04.873Z	31.724° NE	2025-12-11 12:10:04.873Z	52.038° ENE	12.806°	2025-12-11 12:17:04.873Z	75.76° E
36 mins	2025-12-11 14:46:04.873Z	4.927° NNE	2025-12-11 15:04:04.873Z	92.866° ESE	42.74°	2025-12-11 15:22:04.873Z	169.986° S
30 mins	2025-12-11 17:34:04.873Z	350.608° N	2025-12-11 17:48:04.873Z	297.655° NW	30.573°	2025-12-11 18:04:04.873Z	237.075° WSW
28 mins	2025-12-12 01:17:04.873Z	114.278° SE	2025-12-12 01:31:04.873Z	62.256° ENE	28.019°	2025-12-12 01:45:04.873Z	10.322° NNE

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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 OPS 1920, 2481 on other resources

View OPS 1920, 2481 on NASA - NSSDCA Website

View OPS 1920, 2481 on Heavens-Above

View OPS 1920, 2481 on Keep Track

View OPS 1920, 2481 on Celestrak

View OPS 1920, 2481 on Gunter's Space Page

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

OPS 1920, 2481

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: 2025-12-10T12:49:45.159Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #89 in the year 1966 (1966-10-05 UTC)

OPS 1920 Visibility forecast

Co-orbital & Co-planar RSOs

Check out OPS 1920, 2481 on other resources

Documentation

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