THOR AGENA D R/B, 2255
Orbit data source: Space-Track
THOR AGENA D R/B, 2255 is space debris in LEO originally from a launch on Fri, 24 Jun 1966 UTC launched from the Air Force Western Test Range (AFWTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
2255 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
LMSC
Mission
Spacecraft
Bus & Motor
AGENA D, Unknown motor
Mass
600 kg wet, 600 kg dry
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Cyl + 1 Nozzle, 3.1 m
Radar Cross Section
8.306 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 THOR AGENA D R/B
1 02255U 66056B 25260.22134355 -.00000004 00000-0 -63096-2 0 9999
2 02255 86.9714 203.1583 0047727 324.6671 35.0978 7.94756992718634Epoch: 2025-09-17T05:18Z
TLE epoch observation values (Epoch: 2025-09-17T05:18:44.082Z)
Latitude
0.00003°
Longitude
127.07422°
Altitude
4,189.252 km
Speed
6.154 km/s
True Right ascension
13h 32m 37s
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
13:30:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
4,277.091 km
Perigee altitude
4,175.865 km
Semi-major axis
10,604.615 km
Eccentricity
0.00477
Inclination
86.9714°
RAAN
203.1583°
Arg. of periapsis
324.6671°
True anomaly
35.4138°
Mean anomaly
35.0978°
Eccentric anomaly
35.25565°
Mean motion
1.98747 °/min
Orbital period
181.13 mins
BSTAR
-0.0063096
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 #56 in the year 1966 (1966-06-24 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.THOR AGENA D R/B 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. |
|---|---|---|---|---|---|---|---|
| 24 mins | 2025-09-17 20:42:43.560Z | 153.307° SSE | 2025-09-17 20:44:43.560Z | 100.309° ESE | 44.894° | 2025-09-17 21:06:43.560Z | 3.429° NNE |
| 32 mins | 2025-09-17 23:35:43.560Z | 252.382° W | 2025-09-17 23:50:43.560Z | 301.168° NW | 23.256° | 2025-09-18 00:07:43.560Z | 354.604° N |
| 39 mins | 2025-09-18 06:18:43.560Z | 4.95° NNE | 2025-09-18 06:37:43.560Z | 72.691° E | 33.889° | 2025-09-18 06:57:43.560Z | 140.189° SSE |
| 41 mins | 2025-09-18 09:19:43.560Z | 353.348° N | 2025-09-18 09:39:43.560Z | 282.098° WNW | 40.658° | 2025-09-18 10:00:43.560Z | 209.089° SW |
| 7 mins | 2025-09-18 12:28:43.560Z | 327.206° NNW | 2025-09-18 12:31:43.560Z | 318.632° NNW | 10.862° | 2025-09-18 12:35:43.560Z | 307.214° NW |
| 28 mins | 2025-09-18 17:44:43.560Z | 100.93° ESE | 2025-09-18 17:58:43.560Z | 56.748° ENE | 22.516° | 2025-09-18 18:12:43.560Z | 14.152° NNE |
| 8 mins | 2025-09-18 20:34:43.560Z | 177.79° S | 2025-09-18 20:42:43.560Z | 179.328° S | 31.126° | 2025-09-18 20:42:43.560Z | 179.328° S |
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 |
|---|