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.
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
2481 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
LMSC
Mission
Defense Early Warn
Bus & Motor
MIDAS, Unknown motor
Mass
~2,000 kg wet, ~1,000 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cone + Cyl + 2 Pan, 1.5 m
Radar Cross Section
4.418 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 1 day ago
TLE from 1 day ago
0 OPS 1920
1 02481U 66089A 25259.31649658 -.00000003 00000-0 -24285-2 0 9997
2 02481 89.8341 32.9518 0032321 233.1806 126.6079 8.59254045849141Epoch: 2025-09-16T07:35Z
TLE epoch observation values (Epoch: 2025-09-16T07:35:45.304Z)
Latitude
0.00003°
Longitude
-76.49551°
Altitude
3,712.551 km
Speed
6.28 km/s
True Right ascension
02h 11m 48s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
02:55:22
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,721.245 km
Perigee altitude
3,656.171 km
Semi-major axis
10,066.845 km
Eccentricity
0.00323
Inclination
89.8341°
RAAN
32.9518°
Arg. of periapsis
233.1806°
True anomaly
126.90449°
Mean anomaly
126.6079°
Eccentric anomaly
126.75627°
Mean motion
2.14884 °/min
Orbital period
167.53 mins
BSTAR
-0.0024285
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #89 in the year 1966 (1966-10-05 UTC)
Did you know?
You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.OPS 1920 Visibility forecast
Loading observer location...
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. |
|---|---|---|---|---|---|---|---|
| 31 mins | 2025-09-17 11:37:26.830Z | 234.714° WSW | 2025-09-17 11:52:26.830Z | 289.365° WNW | 26.037° | 2025-09-17 12:08:26.830Z | 347.811° N |
| 21 mins | 2025-09-17 17:58:26.830Z | 23.056° NE | 2025-09-17 18:08:26.830Z | 57.54° ENE | 16.774° | 2025-09-17 18:19:26.830Z | 95.587° ESE |
| 37 mins | 2025-09-17 20:42:26.830Z | 2.934° NNE | 2025-09-17 21:00:26.830Z | 83.845° E | 44.37° | 2025-09-17 21:19:26.830Z | 178.242° S |
| 27 mins | 2025-09-17 23:31:26.830Z | 347.907° N | 2025-09-17 23:44:26.830Z | 299.722° NW | 26.873° | 2025-09-17 23:58:26.830Z | 248.128° W |
| 30 mins | 2025-09-18 07:12:26.830Z | 122.438° SE | 2025-09-18 07:27:26.830Z | 62.74° ENE | 31.846° | 2025-09-18 07:42:26.830Z | 7.678° NNE |
| 15 mins | 2025-09-18 09:54:26.830Z | 193.214° SSW | 2025-09-18 10:09:26.830Z | 243.879° WSW | 41.418° | 2025-09-18 10:09:26.830Z | 243.879° WSW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in ascending order |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in ascending order |
|---|