DELTA 1 R/B, 738

Orbit data source: Space-Track

DELTA 1 R/B, 738 is space debris originally from a launch on Tue, 21 Jan 1964 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 URL

https://www.satcat.com/sats-embedded/738?theme=dark&initialShowStats=false

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Identifier

738, 1964-003B

Orbit

Active

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

ABL

Mission

Spacecraft

Bus & Motor

ALTAIR, Unknown motor

Mass

24 kg wet, 24 kg dry

Launch date (UTC)

1964-01-21 (62 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

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 13 hours ago

TLE from 13 hours ago

0 DELTA 1 R/B
1 00738U 64003B   26139.99610471 -.00000016  00000-0  00000-0 0  9997
2 00738  46.4742  25.5944 2605045 342.2778  10.1404  7.39346772683398

Epoch: 2026-05-19T23:54Z

TLE epoch observation values (Epoch: 2026-05-19T23:54:23.446Z)

Latitude

-0.00003°

Longitude

149.33468°

Altitude

1,935.071 km

Speed

7.752 km/s

True Right ascension

01h 42m 22s

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

21:44:18

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

7,652.713 km

Perigee altitude

1,853.29 km

Semi-major axis

11,131.139 km

Eccentricity

0.2605

Inclination

46.4742°

RAAN

25.5944°

Arg. of periapsis

342.2778°

True anomaly

17.7844°

Mean anomaly

10.1404°

Eccentric anomaly

13.66706°

Mean motion

1.84814 °/min

Orbital period

194.79 mins

BSTAR

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Other satellites on launch #3 in the year 1964 (1964-01-21 UTC)

RELAY 2, 737

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DELTA 1 R/B 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.
14 mins	2026-05-20 16:14:00.668Z	138.618° SSE	2026-05-20 16:20:00.668Z	107.471° ESE	14.868°	2026-05-20 16:28:00.668Z	77.005° E
41 mins	2026-05-20 19:31:00.668Z	229.531° WSW	2026-05-20 19:43:00.668Z	137.938° SSE	44.661°	2026-05-20 20:12:00.668Z	63.534° ENE
67 mins	2026-05-20 22:58:00.668Z	281.915° WNW	2026-05-20 23:18:00.668Z	12.505° NNE	44.155°	2026-05-21 00:05:00.668Z	101.123° ESE
81 mins	2026-05-21 02:27:00.668Z	299.239° NW	2026-05-21 02:59:00.668Z	224.704° SW	42.94°	2026-05-21 03:48:00.668Z	152.9° SSE
52 mins	2026-05-21 06:07:00.668Z	287.62° WNW	2026-05-21 06:31:00.668Z	254.568° W	18.746°	2026-05-21 06:59:00.668Z	218.972° SW

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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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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out DELTA 1 R/B, 738 on other resources

View DELTA 1 R/B, 738 on Heavens-Above

View DELTA 1 R/B, 738 on Keep Track

View DELTA 1 R/B, 738 on Celestrak

View DELTA 1 R/B, 738 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, 738

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-05-19T23:54:23.446Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #3 in the year 1964 (1964-01-21 UTC)

DELTA 1 R/B Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 1 R/B, 738 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 13 hours ago