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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: 13 hours ago

TLE from 13 hours ago

0 EXPLORER 25 (INJUN-4)
1   932U 64076B   26038.25114995  .00001283  00000-0  45192-3 0  9990
2   932  81.3403 118.4939 1119283 202.9956 151.7079 12.67065644802672

Epoch: 2026-02-07T06:01Z

TLE epoch observation values (Epoch: 2026-02-07T06:01:39.355Z)

Latitude

-0.00005°

Longitude

-109.29744°

Altitude

2,181.744 km

Speed

6.471 km/s

True Right ascension

07h 53m 58s

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

20:44:25

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,260.843 km

Perigee altitude

521.619 km

Semi-major axis

7,769.368 km

Eccentricity

0.11193

Inclination

81.3403°

RAAN

118.4939°

Arg. of periapsis

202.9956°

True anomaly

157.10995°

Mean anomaly

151.7079°

Eccentric anomaly

154.47164°

Mean motion

3.16931 °/min

Orbital period

113.59 mins

BSTAR

0.00045192

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

SCOUT X-4 DEB, 941 (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 R/B, 933

SCOUT X-4 DEB, 937 (Decayed)

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

SCOUT X-4 DEB, 940 (Decayed)

SCOUT X-4 DEB, 1411 (Decayed)

SCOUT X-4 DEB, 4079 (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.
22 mins	2026-02-08 04:50:20.206Z	154.057° SSE	2026-02-08 05:01:20.206Z	93.079° ESE	36.156°	2026-02-08 05:12:20.206Z	21.001° NNE
22 mins	2026-02-08 06:45:20.206Z	210.484° SW	2026-02-08 06:56:20.206Z	282.917° WNW	39.869°	2026-02-08 07:07:20.206Z	1.127° NNE
9 mins	2026-02-08 08:49:20.206Z	282.739° WNW	2026-02-08 08:53:20.206Z	302.898° NW	14.187°	2026-02-08 08:58:20.206Z	329.796° NNW
10 mins	2026-02-08 16:51:20.206Z	353.427° N	2026-02-08 16:57:20.206Z	73.941° E	44.335°	2026-02-08 17:01:20.206Z	164.986° S

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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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Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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: 13 hours ago

TLE from 13 hours ago

TLE epoch observation values (Epoch: 2026-02-07T06:01:39.355Z)

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: 13 hours ago