OPS 0856, 2403
Orbit data source: Space-Track
OPS 0856, 2403 is a payload satellite owned by USAF SSD (US) in LEO that was launched on Fri, 19 Aug 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
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
2403 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Create New Watchlist
Identifier
Orbit
Country
USRelated business
Manufacturer
LMSC
Mission
Spacecraft
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
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 9 hours ago
TLE from 9 hours ago
0 OPS 0856
1 02403U 66077A 26125.78227767 -.00000004 00000-0 -26827-2 0 9990
2 02403 90.3337 275.9127 0007837 123.9530 236.2068 8.59840938522816Epoch: 2026-05-05T18:46Z
TLE epoch observation values (Epoch: 2026-05-05T18:46:28.790Z)
Latitude
0.00003°
Longitude
130.64056°
Altitude
3,692.885 km
Speed
6.29 km/s
True Right ascension
18h 23m 39s
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
12:01:32
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
3,692.011 km
Perigee altitude
3,676.239 km
Semi-major axis
10,062.262 km
Eccentricity
0.00078
Inclination
90.3337°
RAAN
275.9127°
Arg. of periapsis
123.953°
True anomaly
236.13221°
Mean anomaly
236.2068°
Eccentric anomaly
236.1695°
Mean motion
2.1503 °/min
Orbital period
167.42 mins
BSTAR
-0.0026827
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 #77 in the year 1966 (1966-08-19 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 0856 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. |
|---|---|---|---|---|---|---|---|
| 34 mins | 2026-05-06 08:46:52.750Z | 139.766° SSE | 2026-05-06 09:03:52.750Z | 73.667° E | 37.744° | 2026-05-06 09:20:52.750Z | 4.36° NNE |
| 34 mins | 2026-05-06 11:33:52.750Z | 207.773° SW | 2026-05-06 11:49:52.750Z | 274.436° WNW | 37.238° | 2026-05-06 12:07:52.750Z | 351.498° N |
| 35 mins | 2026-05-06 20:41:52.750Z | 9.065° NNE | 2026-05-06 20:58:52.750Z | 79.587° E | 36.828° | 2026-05-06 21:16:52.750Z | 153.303° SSE |
| 34 mins | 2026-05-06 23:28:52.750Z | 355.546° N | 2026-05-06 23:45:52.750Z | 284.432° WNW | 38.093° | 2026-05-07 00:02:52.750Z | 219.061° SW |
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 descending 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 descending order |
|---|