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: 5 hours ago

TLE from 5 hours ago

0 SCOUT X-4 R/B
1 00721U 63053B   26262.30280703  .00000355  00000-0  20886-3 0  9998
2 00721  78.6051  17.9666 1088176 217.1181 134.9665 12.55153908861868

Epoch: 2026-09-19T07:16Z

TLE epoch observation values (Epoch: 2026-09-19T07:16:02.527Z)

Latitude

-0.00003°

Longitude

-89.25722°

Altitude

2,088.527 km

Speed

6.575 km/s

True Right ascension

01h 11m 51s

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

05:03:13

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,291.29 km

Perigee altitude

589.682 km

Semi-major axis

7,818.623 km

Eccentricity

0.10882

Inclination

78.6051°

RAAN

17.9666°

Arg. of periapsis

217.1181°

True anomaly

142.98703°

Mean anomaly

134.9665°

Eccentric anomaly

139.05257°

Mean motion

3.13941 °/min

Orbital period

114.67 mins

BSTAR

0.00020886

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

SCOUT X-4 DEB, 17665 (Decayed)

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

SCOUT X-4 DEB, 726 (Decayed)

SCOUT X-4 DEB, 725 (Decayed)

SCOUT X-4 DEB, 722 (Decayed)

SCOUT X-4 DEB, 723 (Decayed)

SCOUT X-4 DEB, 732

SCOUT X-4 DEB, 724 (Decayed)

SCOUT X-4 DEB, 3750

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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.
9 mins	2026-09-19 17:32:02.861Z	13.54° NNE	2026-09-19 17:37:02.861Z	48.892° ENE	16.897°	2026-09-19 17:41:02.861Z	83.805° E
13 mins	2026-09-19 19:28:02.861Z	347.486° N	2026-09-19 19:35:02.861Z	1.062° NNE	82.589°	2026-09-19 19:41:02.861Z	168.032° S
4 mins	2026-09-19 21:28:02.861Z	297.234° NW	2026-09-19 21:29:02.861Z	289.144° WNW	12.817°	2026-09-19 21:32:02.861Z	262.69° W
14 mins	2026-09-20 06:23:02.861Z	109.873° ESE	2026-09-20 06:29:02.861Z	80.08° E	19.03°	2026-09-20 06:37:02.861Z	40.78° NE
24 mins	2026-09-20 08:12:02.861Z	176.494° S	2026-09-20 08:24:02.861Z	90.337° ESE	71.82°	2026-09-20 08:36:02.861Z	16.89° NNE
21 mins	2026-09-20 10:11:02.861Z	236.226° WSW	2026-09-20 10:21:02.861Z	295.543° NW	38.535°	2026-09-20 10:32:02.861Z	0.445° 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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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: 5 hours ago

TLE from 5 hours ago

TLE epoch observation values (Epoch: 2026-09-19T07:16:02.527Z)

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: 5 hours ago