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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 (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

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 12 hours ago

TLE from 12 hours ago

0 OPS 1920
1 02481U 66089A   26128.08354575 -.00000004  00000-0 -29982-2 0  9998
2 02481  89.8521  31.5965 0033072   1.8824 358.2147  8.59254686869227

Epoch: 2026-05-08T02:00Z

TLE epoch observation values (Epoch: 2026-05-08T02:00:18.352Z)

Latitude

-0.00006°

Longitude

135.59961°

Altitude

3,659.782 km

Speed

6.313 km/s

True Right ascension

02h 06m 23s

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

22:35:02

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,721.996 km

Perigee altitude

3,655.41 km

Semi-major axis

10,066.84 km

Eccentricity

0.00331

Inclination

89.8521°

RAAN

31.5965°

Arg. of periapsis

1.8824°

True anomaly

358.20284°

Mean anomaly

358.2147°

Eccentric anomaly

358.20878°

Mean motion

2.14884 °/min

Orbital period

167.53 mins

BSTAR

-0.0029982

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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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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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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.
32 mins	2026-05-08 16:02:46.626Z	131.265° SE	2026-05-08 16:18:46.626Z	69.863° E	34.204°	2026-05-08 16:34:46.626Z	6.905° NNE
35 mins	2026-05-08 18:47:46.626Z	199.475° SSW	2026-05-08 19:04:46.626Z	277.054° WNW	40.386°	2026-05-08 19:22:46.626Z	354.267° N
34 mins	2026-05-09 03:56:46.626Z	10.11° NNE	2026-05-09 04:13:46.626Z	79.192° E	33.9°	2026-05-09 04:30:46.626Z	145.038° SSE
35 mins	2026-05-09 06:43:46.626Z	356.189° N	2026-05-09 07:00:46.626Z	285.494° WNW	40.569°	2026-05-09 07:18:46.626Z	211.862° SW
9 mins	2026-05-09 09:36:46.626Z	330.337° NNW	2026-05-09 09:40:46.626Z	317.019° NNW	12.058°	2026-05-09 09:45:46.626Z	300.551° NW

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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: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-05-08T02:00:18.352Z)

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: 12 hours ago