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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>

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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 (60 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

CONE + CYL, 1.1 m

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 22 hours ago

TLE from 22 hours ago

0 OPS 1920
1 02481U 66089A   26307.71596637 -.00000008  00000-0 -50928-2 0  9992
2 02481  89.8644  30.6282 0032989 180.4211 179.6616  8.59257226884658

Epoch: 2026-11-03T17:10Z

TLE epoch observation values (Epoch: 2026-11-03T17:10:59.494Z)

Latitude

-0.00008°

Longitude

89.90566°

Altitude

3,726.269 km

Speed

6.271 km/s

True Right ascension

02h 02m 30s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

11:12:47

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,721.893 km

Perigee altitude

3,655.474 km

Semi-major axis

10,066.82 km

Eccentricity

0.0033

Inclination

89.8644°

RAAN

30.6282°

Arg. of periapsis

180.4211°

True anomaly

179.66382°

Mean anomaly

179.6616°

Eccentric anomaly

179.66271°

Mean motion

2.14884 °/min

Orbital period

167.53 mins

BSTAR

-0.0050928

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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.
35 mins	2026-11-04 16:19:44.465Z	8.261° NNE	2026-11-04 16:36:44.465Z	77.53° E	47.528°	2026-11-04 16:54:44.465Z	151.63° SSE
33 mins	2026-11-04 19:07:44.465Z	354.39° N	2026-11-04 19:23:44.465Z	287.686° WNW	52.435°	2026-11-04 19:40:44.465Z	218.262° SW
22 mins	2026-11-05 02:56:44.465Z	89.235° E	2026-11-05 03:06:44.465Z	54.19° ENE	21.067°	2026-11-05 03:18:44.465Z	13.107° NNE
36 mins	2026-11-05 05:31:44.465Z	166.239° S	2026-11-05 05:48:44.465Z	97.121° ESE	81.189°	2026-11-05 06:07:44.465Z	0.023° NNE
29 mins	2026-11-05 08:24:44.465Z	240.39° WSW	2026-11-05 08:38:44.465Z	291.936° WNW	27.281°	2026-11-05 08:53:44.465Z	346.287° N
23 mins	2026-11-05 14:43:44.465Z	21.554° NNE	2026-11-05 14:54:44.465Z	60.124° ENE	18.834°	2026-11-05 15:06:44.465Z	101.834° ESE

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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: 22 hours ago

TLE from 22 hours ago

TLE epoch observation values (Epoch: 2026-11-03T17:10:59.494Z)

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: 22 hours ago