DELTA 1 R/B, 4903
Orbit data source: Space-Track
DELTA 1 R/B, 4903 is space debris in HEO originally from a launch on Wed, 03 Feb 1971 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.
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Edit Public Description
Identifier
Orbit
Last TLE update
22 hours ago
Origin
Manufacturer
Thiokol/TE
Mission
Spacecraft
Bus & Motor
STAR 37, Unknown motor
Mass
65 kg wet, 65 kg dry
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Sphere + Cone, 0.5 m
Radar Cross Section
0.734 m², Large (>1 m²)
Expand to show TLE details & history
TLE from 22 hours ago
0 DELTA 1 R/B
1 4903U 71009B 25196.76788655 .00002526 00000-0 89944-3 0 9990
2 4903 25.6427 51.1861 5844613 208.8898 99.7727 4.23929843583045Epoch: 2025-07-15T18:25Z
TLE epoch observation values (Epoch: 2025-07-15T18:25:45.397Z)
Latitude
-0.00005°
Longitude
-159.09513°
Altitude
15,363.025 km
Speed
3.457 km/s
True Right ascension
03h 24m 48s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
-3.56779°
Longitude
-167.29361°
Altitude
13,206.056 km
Speed
3.999 km/s
Apparent Right ascension
02h 08m 18s
Apparent Declination
-18° 17' 55"
Sunlit
Visualization observer readout
Local Sidereal Time
05:24:52
Azimuth
228.32° WSW
Elevation
15.957°
Doppler factor
1
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Other satellites on launch #9 in the year 1971 (1971-02-03 UTC)
DELTA 1 R/B 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. |
|---|---|---|---|---|---|---|---|
| 242 mins | 2025-07-16 16:46:14.873Z | 228.292° WSW | 2025-07-16 20:14:14.873Z | 184.738° SSW | 42.574° | 2025-07-16 20:48:14.873Z | 108.65° ESE |
| 104 mins | 2025-07-17 15:02:14.873Z | 213.218° SW | 2025-07-17 16:46:14.873Z | 195.597° SSW | 38.158° | 2025-07-17 16:46:14.873Z | 195.597° SSW |
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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