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: 11 hours ago

TLE from 11 hours ago

0 SCOUT X-4 R/B
1 00721U 63053B   26107.90933286  .00000296  00000-0  16925-3 0  9996
2 00721  78.6015 170.3213 1088587 167.5962 195.4410 12.55092652842497

Epoch: 2026-04-17T21:49Z

TLE epoch observation values (Epoch: 2026-04-17T21:49:26.359Z)

Latitude

-0.00002°

Longitude

-3.07429°

Altitude

2,272.411 km

Speed

6.421 km/s

True Right ascension

11h 21m 17s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

15:25:04

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,291.894 km

Perigee altitude

589.588 km

Semi-major axis

7,818.878 km

Eccentricity

0.10886

Inclination

78.6015°

RAAN

170.3213°

Arg. of periapsis

167.5962°

True anomaly

192.50759°

Mean anomaly

195.441°

Eccentric anomaly

193.93859°

Mean motion

3.13925 °/min

Orbital period

114.68 mins

BSTAR

0.00016925

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

SCOUT X-4 DEB, 726 (Decayed)

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

SCOUT X-4 DEB, 3750

SCOUT X-4 DEB, 723 (Decayed)

SCOUT X-4 DEB, 725 (Decayed)

SCOUT X-4 DEB, 17665 (Decayed)

SCOUT X-4 DEB, 724 (Decayed)

SCOUT X-4 DEB, 722 (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.
8 mins	2026-04-18 15:42:37.185Z	349.239° N	2026-04-18 15:47:37.185Z	100.936° ESE	44.413°	2026-04-18 15:50:37.185Z	162.669° S
8 mins	2026-04-19 02:41:37.185Z	106.909° ESE	2026-04-19 02:45:37.185Z	85.155° E	14.506°	2026-04-19 02:49:37.185Z	60.78° ENE
19 mins	2026-04-19 04:30:37.185Z	176.869° S	2026-04-19 04:41:37.185Z	83.803° E	43.075°	2026-04-19 04:49:37.185Z	18.983° NNE
16 mins	2026-04-19 06:29:37.185Z	238.926° WSW	2026-04-19 06:37:37.185Z	289.881° WNW	28.013°	2026-04-19 06:45:37.185Z	352.537° 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: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2026-04-17T21:49:26.359Z)

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: 11 hours ago