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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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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   26046.22716868  .00000912  00000-0  31826-3 0  9990
2 00932  81.3386 112.3558 1119381 184.9133 174.0190 12.67080301803688

Epoch: 2026-02-15T05:27Z

TLE epoch observation values (Epoch: 2026-02-15T05:27:07.373Z)

Latitude

-0.00012°

Longitude

-114.66384°

Altitude

2,262.894 km

Speed

6.403 km/s

True Right ascension

07h 29m 25s

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

15:54:36

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,260.852 km

Perigee altitude

521.489 km

Semi-major axis

7,769.308 km

Eccentricity

0.11194

Inclination

81.3386°

RAAN

112.3558°

Arg. of periapsis

184.9133°

True anomaly

175.19157°

Mean anomaly

174.019°

Eccentric anomaly

174.62031°

Mean motion

3.16935 °/min

Orbital period

113.59 mins

BSTAR

0.00031826

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

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

SCOUT X-4 DEB, 934 (Decayed)

SCOUT X-4 DEB, 939 (Decayed)

SCOUT X-4 DEB, 936 (Decayed)

SCOUT X-4 DEB, 960 (Decayed)

SCOUT X-4 DEB, 1411 (Decayed)

SCOUT X-4 DEB, 937 (Decayed)

SCOUT X-4 DEB, 941 (Decayed)

SCOUT X-4 R/B, 933

SCOUT X-4 DEB, 4079 (Decayed)

SCOUT X-4 DEB, 940 (Decayed)

SCOUT X-4 DEB, 935 (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.
9 mins	2026-02-15 15:36:51.348Z	2.167° NNE	2026-02-15 15:41:51.348Z	59.087° ENE	33.045°	2026-02-15 15:45:51.348Z	140.848° SSE
5 mins	2026-02-16 02:31:51.348Z	86.037° E	2026-02-16 02:33:51.348Z	75.779° E	11.861°	2026-02-16 02:36:51.348Z	59.789° ENE
21 mins	2026-02-16 04:15:51.348Z	163.868° S	2026-02-16 04:26:51.348Z	95.149° ESE	40.205°	2026-02-16 04:36:51.348Z	18.151° NNE
19 mins	2026-02-16 06:11:51.348Z	222.037° SW	2026-02-16 06:21:51.348Z	284.863° WNW	34.458°	2026-02-16 06:30:51.348Z	353.75° 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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Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

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: 2026-02-15T05:27:07.373Z)

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