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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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: 23 hours ago

TLE from 23 hours ago

0 SCOUT X-4 R/B
1 00721U 63053B   26309.33375662  .00000132  00000-0  69847-4 0  9996
2 00721  78.6008 331.5647 1088307 122.5719 248.5212 12.55170756867761

Epoch: 2026-11-05T08:00Z

TLE epoch observation values (Epoch: 2026-11-05T08:00:36.571Z)

Latitude

-0.00007°

Longitude

166.84309°

Altitude

1,832.547 km

Speed

6.794 km/s

True Right ascension

22h 06m 15s

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

02:58:51

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,291.315 km

Perigee altitude

589.518 km

Semi-major axis

7,818.553 km

Eccentricity

0.10883

Inclination

78.6008°

RAAN

331.5647°

Arg. of periapsis

122.5719°

True anomaly

237.53503°

Mean anomaly

248.5212°

Eccentric anomaly

242.96693°

Mean motion

3.13945 °/min

Orbital period

114.67 mins

BSTAR

0.000069847

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

SCOUT X-4 DEB, 723 (Decayed)

SCOUT X-4 DEB, 3750

SCOUT X-4 DEB, 17665 (Decayed)

SCOUT X-4 DEB, 732

SCOUT X-4 DEB, 725 (Decayed)

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

SCOUT X-4 DEB, 726 (Decayed)

SCOUT X-4 DEB, 724 (Decayed)

SCOUT X-4 DEB, 722 (Decayed)

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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	2026-11-06 13:18:17.515Z	346.216° N	2026-11-06 13:22:17.515Z	180.777° SSW	74.108°	2026-11-06 13:26:17.515Z	169.901° S
13 mins	2026-11-07 02:11:17.515Z	182.111° SSW	2026-11-07 02:19:17.515Z	70.033° E	70.787°	2026-11-07 02:24:17.515Z	18.346° NNE
7 mins	2026-11-07 04:11:17.515Z	258.738° W	2026-11-07 04:15:17.515Z	293.666° NW	17.56°	2026-11-07 04:18:17.515Z	325.126° NNW

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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: 23 hours ago

TLE from 23 hours ago

TLE epoch observation values (Epoch: 2026-11-05T08:00:36.571Z)

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: 23 hours ago