DELTA 1 R/B, 4251
Orbit data source: Space-Track
DELTA 1 R/B, 4251 is space debris in HEO originally from a launch on Sat, 22 Nov 1969 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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4251 intel report (Beta)
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Edit Public Description
Identifier
Orbit
Country
USRelated business
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 & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 DELTA 1 R/B
1 04251U 69101B 25242.41728273 .00001538 00000-0 10899-2 0 9994
2 04251 27.8518 281.4656 5547546 335.1661 6.0997 4.63591363665668Epoch: 2025-08-30T10:00Z
TLE epoch observation values (Epoch: 2025-08-30T10:00:53.227Z)
Latitude
-0.00004°
Longitude
152.40687°
Altitude
623.042 km
Speed
9.361 km/s
True Right ascension
18h 45m 55s
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
17:44:59
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
17,248.605 km
Perigee altitude
388.01 km
Semi-major axis
15,196.445 km
Eccentricity
0.55475
Inclination
27.8518°
RAAN
281.4656°
Arg. of periapsis
335.1661°
True anomaly
25.02037°
Mean anomaly
6.0997°
Eccentric anomaly
13.54295°
Mean motion
1.15859 °/min
Orbital period
310.72 mins
BSTAR
0.0010899
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Other satellites on launch #101 in the year 1969 (1969-11-22 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. |
|---|---|---|---|---|---|---|---|
| 202 mins | 2025-09-01 08:51:28.276Z | 251.948° W | 2025-09-01 09:15:28.276Z | 173.995° S | 42.847° | 2025-09-01 12:13:28.276Z | 123.272° SE |
| 200 mins | 2025-09-01 14:37:28.276Z | 278.03° WNW | 2025-09-01 15:54:28.276Z | 247.393° WSW | 27.113° | 2025-09-01 17:57:28.276Z | 201.604° 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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Authenticating...
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