DELTA 1 R/B(1), 10144
Orbit data source: Space-Track
DELTA 1 R/B(1), 10144 is space debris in LEO originally from a launch on Thu, 14 Jul 1977 UTC launched from the Air Force Eastern Test Range (AFETR). 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
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
10144 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Edit Sat Name
Focus sentinelFocus sentinel
Create New Watchlist
Identifier
Orbit
Country
USRelated business
Manufacturer
MDAC-HB
Mission
Spacecraft
Bus & Motor
DELTA/TR-201, Unknown motor
Mass
845 kg wet, 845 kg dry
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
CYL + SKIRT + NOZZLE, 1.1 m
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 10 hours ago
TLE from 10 hours ago
0 DELTA 1 R/B(1)
1 10144U 77065B 26263.06881395 .00000929 00000-0 24886-3 0 9995
2 10144 29.0642 252.9414 0839514 307.7772 44.9586 13.26101346375508Epoch: 2026-09-20T01:39Z
TLE epoch observation values (Epoch: 2026-09-20T01:39:05.525Z)
Latitude
-0°
Longitude
-130.79992°
Altitude
741.195 km
Speed
7.691 km/s
True Right ascension
16h 51m 45s
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
04:41:58
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,798.609 km
Perigee altitude
532.04 km
Semi-major axis
7,543.461 km
Eccentricity
0.08395
Inclination
29.0642°
RAAN
252.9414°
Arg. of periapsis
307.7772°
True anomaly
52.27932°
Mean anomaly
44.9586°
Eccentric anomaly
48.56472°
Mean motion
3.31274 °/min
Orbital period
108.67 mins
BSTAR
0.00024886
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 #65 in the year 1977 (1977-07-14 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.DELTA 1 R/B(1) 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. |
|---|---|---|---|---|---|---|---|
| 13 mins | 2026-09-21 03:09:55.431Z | 212.986° SW | 2026-09-21 03:15:55.431Z | 157.178° SSE | 29.144° | 2026-09-21 03:22:55.431Z | 105.711° ESE |
| 16 mins | 2026-09-21 05:04:55.431Z | 236.774° WSW | 2026-09-21 05:10:55.431Z | 180.656° SSW | 43.115° | 2026-09-21 05:20:55.431Z | 109.258° ESE |
| 17 mins | 2026-09-21 06:59:55.431Z | 251.017° W | 2026-09-21 07:06:55.431Z | 196.997° SSW | 39.978° | 2026-09-21 07:16:55.431Z | 128.92° SE |
| 14 mins | 2026-09-21 08:56:55.431Z | 247.782° W | 2026-09-21 09:02:55.431Z | 209.682° SW | 24.755° | 2026-09-21 09:10:55.431Z | 160.613° 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 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 |
|---|