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 (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: 8 hours ago

TLE from 8 hours ago

0 SCOUT X-4 R/B
1   871U 64051B   26099.10638809  .00000171  00000-0  10710-3 0  9994
2   871  79.8928 144.1538 0085248 330.5696  29.0678 14.00662956135196

Epoch: 2026-04-09T02:33Z

TLE epoch observation values (Epoch: 2026-04-09T02:33:11.930Z)

Latitude

-0.00007°

Longitude

-91.50508°

Altitude

840.29 km

Speed

7.46 km/s

True Right ascension

09h 36m 36s

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

16:24:56

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

950.705 km

Perigee altitude

826.807 km

Semi-major axis

7,266.893 km

Eccentricity

0.00852

Inclination

79.8928°

RAAN

144.1538°

Arg. of periapsis

330.5696°

True anomaly

29.54686°

Mean anomaly

29.0678°

Eccentric anomaly

29.30688°

Mean motion

3.50364 °/min

Orbital period

102.75 mins

BSTAR

0.0001071

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

SCOUT X-4 DEB, 874 (Decayed)

EXPLORER 20, 870

SCOUT X-4 DEB, 875 (Decayed)

SCOUT X-4 DEB, 40592 (Decayed)

SCOUT X-4 DEB, 873 (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.
8 mins	2026-04-09 13:24:42.749Z	20.262° NNE	2026-04-09 13:28:42.749Z	63.385° ENE	19.94°	2026-04-09 13:32:42.749Z	108.835° ESE
10 mins	2026-04-09 15:08:42.749Z	337.159° NNW	2026-04-09 15:13:42.749Z	246.558° WSW	39.851°	2026-04-09 15:18:42.749Z	187.998° SSW
7 mins	2026-04-10 02:41:42.749Z	125.343° SE	2026-04-10 02:44:42.749Z	84.852° E	20.938°	2026-04-10 02:48:42.749Z	40.057° NE
9 mins	2026-04-10 04:23:42.749Z	218.162° SW	2026-04-10 04:27:42.749Z	276.105° WNW	35.175°	2026-04-10 04:32:42.749Z	355.439° 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, 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: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-04-09T02:33:11.930Z)

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: 8 hours ago