SCOUT X-4 R/B, 871

Orbit data source: Space-Track

SCOUT X-4 R/B, 871 is space debris in LEO originally from a launch on Tue, 25 Aug 1964 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/871?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

871, 1964-051B

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

ABL

Mission

Spacecraft

Bus & Motor

ALTAIR, Unknown motor

Mass

33 kg wet, 33 kg dry

Launch date (UTC)

1964-08-25 (61 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: 16 hours ago

TLE from 16 hours ago

0 SCOUT X-4 R/B
1   871U 64051B   25311.45021723  .00000375  00000-0  23914-3 0  9995
2   871  79.8921 312.8073 0086715  17.8955 342.5226 14.00557994113823

Epoch: 2025-11-07T10:48Z

TLE epoch observation values (Epoch: 2025-11-07T10:48:18.768Z)

Latitude

0.00001°

Longitude

103.83509°

Altitude

834.611 km

Speed

7.466 km/s

True Right ascension

20h 51m 13s

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

23:01:56

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

952.137 km

Perigee altitude

826.101 km

Semi-major axis

7,267.256 km

Eccentricity

0.00867

Inclination

79.8921°

RAAN

312.8073°

Arg. of periapsis

17.8955°

True anomaly

342.22105°

Mean anomaly

342.5226°

Eccentric anomaly

342.37214°

Mean motion

3.50338 °/min

Orbital period

102.76 mins

BSTAR

0.00023914

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Other satellites on launch #51 in the year 1964 (1964-08-25 UTC)

EXPLORER 20, 870

SCOUT X-4 DEB, 874 (Decayed)

SCOUT X-4 DEB, 875 (Decayed)

SCOUT X-4 DEB, 873 (Decayed)

SCOUT X-4 DEB, 40592 (Decayed)

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SCOUT X-4 R/B Visibility forecast

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Set Observer location

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.
11 mins	2025-11-08 11:22:11.987Z	1.574° NNE	2025-11-08 11:27:11.987Z	63.732° ENE	36.408°	2025-11-08 11:33:11.987Z	147.942° SSE
7 mins	2025-11-08 13:08:11.987Z	308.459° NW	2025-11-08 13:11:11.987Z	270.162° WNW	21.621°	2025-11-08 13:15:11.987Z	224.529° SW
8 mins	2025-11-09 00:39:11.987Z	167.236° S	2025-11-09 00:42:11.987Z	117.612° SE	39.298°	2025-11-09 00:47:11.987Z	21.791° NNE
5 mins	2025-11-09 02:25:11.987Z	270.366° WNW	2025-11-09 02:27:11.987Z	296.476° NW	17.105°	2025-11-09 02:30:11.987Z	331.919° NNW

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

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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, 871 on other resources

View SCOUT X-4 R/B, 871 on Heavens-Above

View SCOUT X-4 R/B, 871 on Keep Track

View SCOUT X-4 R/B, 871 on Celestrak

View SCOUT X-4 R/B, 871 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, 871

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 16 hours ago

TLE from 16 hours ago

TLE epoch observation values (Epoch: 2025-11-07T10:48:18.768Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #51 in the year 1964 (1964-08-25 UTC)

SCOUT X-4 R/B Visibility forecast

Co-orbital & Co-planar RSOs

Check out SCOUT X-4 R/B, 871 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 16 hours ago