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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 URL

https://www.satcat.com/sats-embedded/2481?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

2481, 1966-089A

Orbit

LEO

Last TLE update

13 hours ago

Origin

United States Space Force (US)

Manufacturer

LMSC

Mission

Defense Early Warn

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

Cone + Cyl + 2 Pan, 1.5 m

Radar Cross Section

4.418 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 13 hours ago

0 OPS 1920
1 02481U 66089A   25198.89564233  .00000003  00000-0  77407-3 0  9990
2 02481  89.8212  33.3348 0031963 295.4011  64.3533  8.59254905843955

Epoch: 2025-07-17T21:29Z

TLE epoch observation values (Epoch: 2025-07-17T21:29:43.497Z)

Latitude

-0.00005°

Longitude

134.94867°

Altitude

3,679.22 km

Speed

6.3 km/s

True Right ascension

02h 13m 20s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-57.95872°

Longitude

-44.77017°

Altitude

3,695.6 km

Speed

6.297 km/s

Apparent Right ascension

12h 49m 45s

Apparent Declination

-52° 58' 43"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

23:16:46

Azimuth

222.717° SW

Elevation

-69.493°

Doppler factor

Orbital elements

Apogee altitude

3,720.878 km

Perigee altitude

3,656.525 km

Semi-major axis

10,066.839 km

Eccentricity

0.0032

Inclination

89.8212°

RAAN

33.3348°

Arg. of periapsis

295.4011°

True anomaly

64.68405°

Mean anomaly

64.3533°

Eccentric anomaly

64.51862°

Mean motion

2.14884 °/min

Orbital period

167.53 mins

BSTAR

0.00077407

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

SECOR 8 (EGRS 8), 2520

OPS 1920 Visibility forecast

Observer location: undefined°, undefined°

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.
33 mins	2025-07-18 11:32:17.169Z	131.962° SE	2025-07-18 11:48:17.169Z	69.967° E	34.757°	2025-07-18 12:05:17.169Z	5.489° NNE
35 mins	2025-07-18 14:17:17.169Z	200.604° SSW	2025-07-18 14:34:17.169Z	277.032° WNW	40.079°	2025-07-18 14:52:17.169Z	353.924° N
34 mins	2025-07-18 23:26:17.169Z	9.462° NNE	2025-07-18 23:43:17.169Z	77.7° E	34.479°	2025-07-19 00:00:17.169Z	145.638° SSE
35 mins	2025-07-19 02:13:17.169Z	356.113° N	2025-07-19 02:30:17.169Z	287.801° WNW	40.167°	2025-07-19 02:48:17.169Z	213.13° SW
9 mins	2025-07-19 05:06:17.169Z	330.962° NNW	2025-07-19 05:10:17.169Z	317.801° NNW	11.678°	2025-07-19 05:15:17.169Z	301.497° NW
19 mins	2025-07-19 10:05:17.169Z	80.951° E	2025-07-19 10:14:17.169Z	49.454° ENE	17.594°	2025-07-19 10:24:17.169Z	15.705° NNE

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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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.