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.

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https://www.satcat.com/sats-embedded/10144?theme=dark&initialShowStats=false

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Identifier

10144, 1977-065B

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

MDAC-HB

Mission

Spacecraft

Bus & Motor

DELTA/TR-201, Unknown motor

Mass

845 kg wet, 845 kg dry

Launch date (UTC)

1977-07-14 (48 years ago)

Launch vehicle

Unknown

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 6 hours ago

TLE from 6 hours ago

0 DELTA 1 R/B(1)
1 10144U 77065B   25349.93713963  .00000634  00000-0  15603-3 0  9990
2 10144  29.0635 183.5338 0841430 257.7207  92.7978 13.25742598338561

Epoch: 2025-12-15T22:29Z

TLE epoch observation values (Epoch: 2025-12-15T22:29:28.864Z)

Latitude

0.00001°

Longitude

121.335°

Altitude

1,244.946 km

Speed

7.194 km/s

True Right ascension

12h 14m 08s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

02:53:18

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,801.528 km

Perigee altitude

531.84 km

Semi-major axis

7,544.821 km

Eccentricity

0.08414

Inclination

29.0635°

RAAN

183.5338°

Arg. of periapsis

257.7207°

True anomaly

102.33499°

Mean anomaly

92.7978°

Eccentric anomaly

97.57675°

Mean motion

3.31184 °/min

Orbital period

108.7 mins

BSTAR

0.00015603

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Other satellites on launch #65 in the year 1977 (1977-07-14 UTC)

DELTA 1 DEB, 10476 (Decayed)

DELTA 1 DEB, 10182 (Decayed)

DELTA 1 DEB, 10202 (Decayed)

DELTA 1 DEB, 19455 (Decayed)

DELTA 1 DEB, 10251

DELTA 1 DEB, 10191 (Decayed)

DELTA 1 DEB, 10208

DELTA 1 DEB, 10629

DELTA 1 DEB, 14565

DELTA 1 DEB, 10259 (Decayed)

DELTA 1 DEB, 10477 (Decayed)

DELTA 1 DEB, 10632 (Decayed)

DELTA 1 DEB, 10210 (Decayed)

DELTA 1 DEB, 10303 (Decayed)

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DELTA 1 R/B(1) Visibility forecast

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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.
10 mins	2025-12-16 14:54:31.272Z	176.008° S	2025-12-16 14:59:31.272Z	143.591° SSE	15.588°	2025-12-16 15:04:31.272Z	114.523° SE
16 mins	2025-12-16 16:47:31.272Z	214.004° SW	2025-12-16 16:54:31.272Z	161.585° S	29.933°	2025-12-16 17:03:31.272Z	103.095° ESE
18 mins	2025-12-16 18:42:31.272Z	240.634° WSW	2025-12-16 18:50:31.272Z	181.799° SSW	36.023°	2025-12-16 19:00:31.272Z	109.718° ESE
17 mins	2025-12-16 20:38:31.272Z	254.283° W	2025-12-16 20:47:31.272Z	190.257° SSW	33.245°	2025-12-16 20:55:31.272Z	131.368° SE
12 mins	2025-12-16 22:36:31.272Z	250.195° W	2025-12-16 22:42:31.272Z	212.375° SW	21.255°	2025-12-16 22:48:31.272Z	168.345° S

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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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Check out DELTA 1 R/B(1), 10144 on other resources

View DELTA 1 R/B(1), 10144 on Heavens-Above

View DELTA 1 R/B(1), 10144 on Keep Track

View DELTA 1 R/B(1), 10144 on Celestrak

View DELTA 1 R/B(1), 10144 on Gunter's Space Page

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

DELTA 1 R/B(1), 10144

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2025-12-15T22:29:28.864Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #65 in the year 1977 (1977-07-14 UTC)

DELTA 1 R/B(1) Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 1 R/B(1), 10144 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 6 hours ago