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: 17 hours ago

TLE from 17 hours ago

0 SCOUT X-4 R/B
1   721U 63053B   26045.57113257  .00000228  00000-0  13795-3 0  9995
2   721  78.5988 231.8272 1087830 292.9652  56.0319 12.55046798834673

Epoch: 2026-02-14T13:42Z

TLE epoch observation values (Epoch: 2026-02-14T13:42:25.854Z)

Latitude

-0.00004°

Longitude

-118.37281°

Altitude

1,040.193 km

Speed

7.52 km/s

True Right ascension

15h 27m 18s

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

09:02:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,291.513 km

Perigee altitude

590.35 km

Semi-major axis

7,819.069 km

Eccentricity

0.10878

Inclination

78.5988°

RAAN

231.8272°

Arg. of periapsis

292.9652°

True anomaly

67.14647°

Mean anomaly

56.0319°

Eccentric anomaly

61.50991°

Mean motion

3.13914 °/min

Orbital period

114.68 mins

BSTAR

0.00013795

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

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

SCOUT X-4 DEB, 725 (Decayed)

SCOUT X-4 DEB, 723 (Decayed)

SCOUT X-4 DEB, 726 (Decayed)

SCOUT X-4 DEB, 722 (Decayed)

SCOUT X-4 DEB, 724 (Decayed)

SCOUT X-4 DEB, 3750

SCOUT X-4 DEB, 732

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.
5 mins	2026-02-15 10:56:19.322Z	87.687° E	2026-02-15 10:59:19.322Z	68.746° E	11.646°	2026-02-15 11:01:19.322Z	57.102° ENE
17 mins	2026-02-15 12:46:19.322Z	170.365° S	2026-02-15 12:52:19.322Z	96.241° ESE	42.234°	2026-02-15 13:03:19.322Z	17.517° NNE
16 mins	2026-02-15 14:43:19.322Z	246.813° WSW	2026-02-15 14:50:19.322Z	307.164° NW	28.471°	2026-02-15 14:59:19.322Z	0.283° NNE
12 mins	2026-02-15 20:56:19.322Z	14.37° NNE	2026-02-15 21:02:19.322Z	43.38° NE	15.352°	2026-02-15 21:08:19.322Z	73.067° E
22 mins	2026-02-15 22:51:19.322Z	356.021° N	2026-02-15 23:02:19.322Z	65.389° ENE	38.67°	2026-02-15 23:13:19.322Z	142.46° SSE
20 mins	2026-02-16 00:48:19.322Z	336.049° NNW	2026-02-16 00:59:19.322Z	264.755° W	37.314°	2026-02-16 01:08:19.322Z	202.728° SW

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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: 17 hours ago

TLE from 17 hours ago

TLE epoch observation values (Epoch: 2026-02-14T13:42:25.854Z)

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: 17 hours ago