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 (62 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

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: 1 day ago

TLE from 1 day ago

0 SCOUT X-4 R/B
1 00721U 63053B   26135.09260356  .00000124  00000-0  64934-4 0  9992
2 00721  78.5979 143.5073 1088373 112.9439 259.0128 12.55102137845909

Epoch: 2026-05-15T02:13Z

TLE epoch observation values (Epoch: 2026-05-15T02:13:20.947Z)

Latitude

-0.00001°

Longitude

-122.65886°

Altitude

1,694.141 km

Speed

6.916 km/s

True Right ascension

09h 34m 01s

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

14:22:55

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,291.683 km

Perigee altitude

589.72 km

Semi-major axis

7,818.839 km

Eccentricity

0.10884

Inclination

78.5979°

RAAN

143.5073°

Arg. of periapsis

112.9439°

True anomaly

247.16401°

Mean anomaly

259.0128°

Eccentric anomaly

253.04784°

Mean motion

3.13928 °/min

Orbital period

114.68 mins

BSTAR

0.000064934

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

SCOUT X-4 DEB, 726 (Decayed)

SCOUT X-4 DEB, 722 (Decayed)

SCOUT X-4 DEB, 725 (Decayed)

SCOUT X-4 DEB, 17665 (Decayed)

SCOUT X-4 DEB, 3750

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

SCOUT X-4 DEB, 723 (Decayed)

SCOUT X-4 DEB, 724 (Decayed)

SCOUT X-4 DEB, 732

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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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.
7 mins	2026-05-16 11:19:33.306Z	15.999° NNE	2026-05-16 11:22:33.306Z	66.273° ENE	24.253°	2026-05-16 11:26:33.306Z	128.095° SE
4 mins	2026-05-16 13:17:33.306Z	285.756° WNW	2026-05-16 13:18:33.306Z	268.676° W	18.047°	2026-05-16 13:21:33.306Z	226.094° WSW
9 mins	2026-05-17 00:15:33.306Z	144.251° SSE	2026-05-17 00:20:33.306Z	90.646° ESE	25.76°	2026-05-17 00:24:33.306Z	42.6° NE
10 mins	2026-05-17 02:10:33.306Z	223.298° SW	2026-05-17 02:16:33.306Z	291.751° WNW	31.663°	2026-05-17 02:20:33.306Z	349.021° N

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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 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: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-05-15T02:13:20.947Z)

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: 1 day ago