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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<iframe src="https://www.satcat.com/sats-embedded/4903?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/4903?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

4903, 1971-009B

Orbit

HEO

Last TLE update

12 hours ago

Origin

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Thiokol/TE

Mission

Spacecraft

Bus & Motor

STAR 37, Unknown motor

Mass

65 kg wet, 65 kg dry

Launch date (UTC)

1971-02-03 (54 years ago)

Launch vehicle

Unknown

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Sphere + Cone, 1 m

Radar Cross Section

0.734 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 12 hours ago

0 DELTA 1 R/B
1 04903U 71009B   25121.62616758  .00005424  00000-0  16584-2 0  9996
2 04903  25.5209 112.2419 5854030 105.2742 323.4764  4.23406038579872

Epoch: 2025-05-01T15:01Z

Definitive object data (Epoch: 2025-05-01T15:01:40.878Z)

Latitude

-0.00003°

Longitude

27.01553°

Altitude

6,153.515 km

Speed

6.238 km/s

True Right ascension

07h 28m 55s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

8.7318°

Longitude

-172.06492°

Altitude

1,477.972 km

Speed

8.763 km/s

Apparent Right ascension

19h 55m 22s

Apparent Declination

-15° 17' 03"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

10:49:02

Azimuth

69.536° E

Elevation

-44.955°

Doppler factor

Orbital elements

Apogee altitude

19,215.766 km

Perigee altitude

314.896 km

Semi-major axis

16,143.468 km

Eccentricity

0.585403

Inclination

25.5209°

RAAN

112.2419°

Arg. of periapsis

105.2742°

True anomaly

254.84052°

Mean anomaly

323.4764°

Eccentric anomaly

292.48511°

Mean motion

1.05815 °/min

BSTAR

0.0016584

Orbital period

340.22 mins

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Other satellites on launch #9 in the year 1971 (1971-02-03 UTC)

NATO 2B, 4902

DELTA 1 DEB, 5974 (Decayed)

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.
41 mins	2025-05-03 00:42:21.227Z	220.355° SW	2025-05-03 01:15:21.227Z	180.229° SSW	22.407°	2025-05-03 01:23:21.227Z	134.888° SE

Authenticating...

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Check out DELTA 1 R/B, 4903 on other resources

View DELTA 1 R/B, 4903 on Heavens-Above

View DELTA 1 R/B, 4903 on Keep Track

View DELTA 1 R/B, 4903 on Celestrak

View DELTA 1 R/B, 4903 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.