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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

CONE + CYL, 1.1 m

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 17 hours ago

TLE from 17 hours ago

0 OPS 1920
1 02481U 66089A   26258.35484929  .00000004  00000-0  11635-2 0  9993
2 02481  89.8571  30.8740 0032378 229.3975 130.4057  8.59256937880412

Epoch: 2026-09-15T08:30Z

TLE epoch observation values (Epoch: 2026-09-15T08:30:58.978Z)

Latitude

-0.00008°

Longitude

-91.19373°

Altitude

3,714.247 km

Speed

6.279 km/s

True Right ascension

02h 03m 29s

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

18:22:27

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

3,721.28 km

Perigee altitude

3,656.091 km

Semi-major axis

10,066.823 km

Eccentricity

0.00324

Inclination

89.8571°

RAAN

30.874°

Arg. of periapsis

229.3975°

True anomaly

130.68749°

Mean anomaly

130.4057°

Eccentric anomaly

130.54667°

Mean motion

2.14884 °/min

Orbital period

167.53 mins

BSTAR

0.0011635

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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.
30 mins	2026-09-16 06:58:49.064Z	118.564° SE	2026-09-16 07:13:49.064Z	63.618° ENE	34.167°	2026-09-16 07:28:49.064Z	8.688° NNE
36 mins	2026-09-16 09:40:49.064Z	187.472° SSW	2026-09-16 09:57:49.064Z	262.681° W	71.736°	2026-09-16 10:16:49.064Z	356.26° N
18 mins	2026-09-16 12:42:49.064Z	276.549° WNW	2026-09-16 12:50:49.064Z	303.598° NW	15.102°	2026-09-16 13:00:49.064Z	336.985° NNW
31 mins	2026-09-16 18:51:49.064Z	14.295° NNE	2026-09-16 19:06:49.064Z	72.203° E	32.744°	2026-09-16 19:22:49.064Z	132.04° SE
36 mins	2026-09-16 21:37:49.064Z	358.402° N	2026-09-16 21:55:49.064Z	273.332° WNW	71.619°	2026-09-16 22:13:49.064Z	200.794° SSW
18 mins	2026-09-17 00:27:49.064Z	341.098° N	2026-09-17 00:36:49.064Z	310.407° NW	17.125°	2026-09-17 00:45:49.064Z	279.861° WNW

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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: 17 hours ago

TLE from 17 hours ago

TLE epoch observation values (Epoch: 2026-09-15T08:30:58.978Z)

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: 17 hours ago