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EXPLORER 40 (INJUN-5), 3338

Orbit data source: Space-Track

EXPLORER 40 (INJUN-5), 3338 is a payload satellite owned by NASA LaRC (US) in LEO that was launched on Thu, 08 Aug 1968 UTC via an SCOUT B 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/3338?theme=dark&initialShowStats=false

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Identifier

3338, 1968-066B

Orbit

LEO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Iowa

Mission

Spacecraft

Bus & Motor

INJUN E, Unknown motor

Mass

70 kg wet, 70 kg dry

Launch date (UTC)

1968-08-08 (58 years ago)

Launch vehicle

SCOUT B

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

HEX CYL + 5 ANT, 1.1 m

Radar Cross Section

Large (>1 m²)

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

TLE from 8 hours ago

0 EXPLORER 40 (INJUN-5)
1 03338U 68066B   26260.26415551  .00000038  00000-0  22543-4 0  9999
2 03338  80.6666  16.4724 1129475 111.8784 260.6136 12.23589404589570

Epoch: 2026-09-17T06:20Z

TLE epoch observation values (Epoch: 2026-09-17T06:20:23.036Z)

Latitude

0.00001°

Longitude

-74.82747°

Altitude

1,821.598 km

Speed

6.867 km/s

True Right ascension

01h 05m 53s

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

07:07:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

2,472.566 km

Perigee altitude

676.138 km

Semi-major axis

7,952.489 km

Eccentricity

0.11295

Inclination

80.6666°

RAAN

16.4724°

Arg. of periapsis

111.8784°

True anomaly

248.22855°

Mean anomaly

260.6136°

Eccentric anomaly

254.38115°

Mean motion

3.06047 °/min

Orbital period

117.63 mins

BSTAR

0.000022543

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Other satellites on launch #66 in the year 1968 (1968-08-08 UTC)

SCOUT B DEB, 3391 (Decayed)

SCOUT B DEB, 29278

SCOUT B R/B, 3341

SCOUT B DEB, 3393 (Decayed)

SCOUT B DEB, 29277 (Decayed)

SCOUT B DEB, 3392

SCOUT B DEB, 29279

EXPLORER 39 (ADI-3), 3337 (Decayed)

SCOUT B DEB, 23307 (Decayed)

SCOUT B DEB, 3342 (Decayed)

SCOUT B DEB, 3390 (Decayed)

SCOUT B DEB, 3343 (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 40 (INJUN-5) 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	2026-09-17 18:42:17.339Z	20.196° NNE	2026-09-17 18:46:17.339Z	81.482° E	24.107°	2026-09-17 18:50:17.339Z	128.518° SE
6 mins	2026-09-17 20:42:17.339Z	306.436° NW	2026-09-17 20:44:17.339Z	273.375° WNW	24.806°	2026-09-17 20:48:17.339Z	218.123° SW
12 mins	2026-09-18 07:57:17.339Z	161.398° S	2026-09-18 08:03:17.339Z	103.844° ESE	46.753°	2026-09-18 08:09:17.339Z	25.069° NE
10 mins	2026-09-18 09:57:17.339Z	237.838° WSW	2026-09-18 10:02:17.339Z	283.313° WNW	26.181°	2026-09-18 10:07:17.339Z	340.458° 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 EXPLORER 40 (INJUN-5), 3338 on other resources

View EXPLORER 40 (INJUN-5), 3338 on NASA - NSSDCA Website

View EXPLORER 40 (INJUN-5), 3338 on Heavens-Above

View EXPLORER 40 (INJUN-5), 3338 on Keep Track

View EXPLORER 40 (INJUN-5), 3338 on Celestrak

View EXPLORER 40 (INJUN-5), 3338 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 40 (INJUN-5), 3338

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: 2026-09-17T06:20:23.036Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #66 in the year 1968 (1968-08-08 UTC)

EXPLORER 40 (INJUN-5) Visibility forecast

Co-orbital & Co-planar RSOs

Check out EXPLORER 40 (INJUN-5), 3338 on other resources

Documentation

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