SCOUT X-4 R/B, 721

Orbit data source: Space-Track

SCOUT X-4 R/B, 721 is space debris in LEO originally from a launch on Thu, 19 Dec 1963 UTC launched from the Air Force Western Test Range (AFWTR). 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/721?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

721, 1963-053B

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

ABL

Mission

Spacecraft

Bus & Motor

ALTAIR, Unknown motor

Mass

68 kg wet, 33 kg dry

Launch date (UTC)

1963-12-19 (63 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

CYL, 1.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 10 hours ago

TLE from 10 hours ago

0 SCOUT X-4 R/B
1 00721U 63053B   26315.79016847  .00000073  00000-0  34749-4 0  9997
2 00721  78.6002 325.1939 1088211 109.5891 262.5817 12.55172194868573

Epoch: 2026-11-11T18:57Z

TLE epoch observation values (Epoch: 2026-11-11T18:57:50.555Z)

Latitude

-0.00001°

Longitude

-10.19971°

Altitude

1,644.051 km

Speed

6.96 km/s

True Right ascension

21h 40m 46s

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

01:45:58

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,291.233 km

Perigee altitude

589.587 km

Semi-major axis

7,818.547 km

Eccentricity

0.10882

Inclination

78.6002°

RAAN

325.1939°

Arg. of periapsis

109.5891°

True anomaly

250.51915°

Mean anomaly

262.5817°

Eccentric anomaly

256.51851°

Mean motion

3.13945 °/min

Orbital period

114.67 mins

BSTAR

0.000034749

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Other satellites on launch #53 in the year 1963 (1963-12-19 UTC)

SCOUT X-4 DEB, 723 (Decayed)

EXPLORER 19 (ADI-1), 714 (Decayed)

SCOUT X-4 DEB, 3750

SCOUT X-4 DEB, 725 (Decayed)

SCOUT X-4 DEB, 732

SCOUT X-4 DEB, 724 (Decayed)

SCOUT X-4 DEB, 726 (Decayed)

SCOUT X-4 DEB, 722 (Decayed)

SCOUT X-4 DEB, 17665 (Decayed)

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SCOUT X-4 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.
8 mins	2026-11-12 12:46:00.665Z	337.361° NNW	2026-11-12 12:50:00.665Z	232.325° WSW	58.102°	2026-11-12 12:54:00.665Z	181.608° SSW
12 mins	2026-11-13 01:40:00.665Z	191.261° SSW	2026-11-13 01:47:00.665Z	344.576° N	87.406°	2026-11-13 01:52:00.665Z	12.434° NNE

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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 SCOUT X-4 R/B, 721 on other resources

View SCOUT X-4 R/B, 721 on Heavens-Above

View SCOUT X-4 R/B, 721 on Keep Track

View SCOUT X-4 R/B, 721 on Celestrak

View SCOUT X-4 R/B, 721 on Gunter's Space Page

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

SCOUT X-4 R/B, 721

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 10 hours ago

TLE from 10 hours ago

TLE epoch observation values (Epoch: 2026-11-11T18:57:50.555Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #53 in the year 1963 (1963-12-19 UTC)

SCOUT X-4 R/B Visibility forecast

Co-orbital & Co-planar RSOs

Check out SCOUT X-4 R/B, 721 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 10 hours ago