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EXPLORER 25 (INJUN-4), 932

Orbit data source: Space-Track

EXPLORER 25 (INJUN-4), 932 is a payload satellite owned by NASA LaRC (US) in LEO that was launched on Sat, 21 Nov 1964 UTC via an SCOUT X-4 launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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Iframe URL

https://www.satcat.com/sats-embedded/932?theme=dark&initialShowStats=false

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Identifier

932, 1964-076B

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

BENDX/UIA

Mission

Spacecraft

Bus & Motor

BENDIX UTILITY, Unknown motor

Mass

41 kg wet, 41 kg dry

Launch date (UTC)

1964-11-21 (61 years ago)

Launch vehicle

SCOUT X-4

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 EXPLORER 25 (INJUN-4)
1 00932U 64076B   26083.97290415  .00000498  00000-0  16637-3 0  9990
2 00932  81.3349  83.3029 1119742  99.3453 273.5771 12.67119040808466

Epoch: 2026-03-24T23:20Z

TLE epoch observation values (Epoch: 2026-03-24T23:20:58.918Z)

Latitude

0.00004°

Longitude

-89.38547°

Altitude

1,439.447 km

Speed

7.122 km/s

True Right ascension

05h 33m 12s

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

12:30:38

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,260.957 km

Perigee altitude

521.068 km

Semi-major axis

7,769.149 km

Eccentricity

0.11197

Inclination

81.3349°

RAAN

83.3029°

Arg. of periapsis

99.3453°

True anomaly

260.7657°

Mean anomaly

273.5771°

Eccentric anomaly

267.16928°

Mean motion

3.16944 °/min

Orbital period

113.58 mins

BSTAR

0.00016637

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Other satellites on launch #76 in the year 1964 (1964-11-21 UTC)

SCOUT X-4 DEB, 936 (Decayed)

EXPLORER 24 (ADI-2), 931 (Decayed)

SCOUT X-4 R/B, 933

SCOUT X-4 DEB, 937 (Decayed)

SCOUT X-4 DEB, 935 (Decayed)

SCOUT X-4 DEB, 939 (Decayed)

SCOUT X-4 DEB, 934 (Decayed)

SCOUT X-4 DEB, 940 (Decayed)

SCOUT X-4 DEB, 941 (Decayed)

SCOUT X-4 DEB, 960 (Decayed)

SCOUT X-4 DEB, 1411 (Decayed)

SCOUT X-4 DEB, 4079 (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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EXPLORER 25 (INJUN-4) 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	2026-03-25 11:17:01.739Z	9.877° NNE	2026-03-25 11:20:01.739Z	64.227° ENE	33.654°	2026-03-25 11:25:01.739Z	149.272° SSE
9 mins	2026-03-26 00:06:01.739Z	161.05° S	2026-03-26 00:11:01.739Z	86.591° E	34.564°	2026-03-26 00:15:01.739Z	26.126° NE
5 mins	2026-03-26 02:03:01.739Z	256.955° W	2026-03-26 02:05:01.739Z	280.844° WNW	16.878°	2026-03-26 02:08:01.739Z	321.692° 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 EXPLORER 25 (INJUN-4), 932 on other resources

View EXPLORER 25 (INJUN-4), 932 on NASA - NSSDCA Website

View EXPLORER 25 (INJUN-4), 932 on Heavens-Above

View EXPLORER 25 (INJUN-4), 932 on Keep Track

View EXPLORER 25 (INJUN-4), 932 on Celestrak

View EXPLORER 25 (INJUN-4), 932 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

EXPLORER 25 (INJUN-4), 932

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: 2026-03-24T23:20:58.918Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #76 in the year 1964 (1964-11-21 UTC)

EXPLORER 25 (INJUN-4) Visibility forecast

Co-orbital & Co-planar RSOs

Check out EXPLORER 25 (INJUN-4), 932 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago