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EXPLORER 38 (RAE-A), 3307

Orbit data source: Space-Track

EXPLORER 38 (RAE-A), 3307 is a payload satellite owned by GSFC (US) that was launched on Thu, 04 Jul 1968 UTC via a THOR DELTA J 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/3307?theme=dark&initialShowStats=false

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Identifier

3307, 1968-055A

Orbit

Active

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

GSFC/FAIRH

Mission

Spacecraft

Bus & Motor

RAE, Unknown motor

Mass

189 kg wet, 189 kg dry

Launch date (UTC)

1968-07-04 (58 years ago)

Launch vehicle

THOR DELTA J

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 1 day ago

TLE from 1 day ago

0 EXPLORER 38 (RAE-A)
1  3307U 68055A   26055.52703237 -.00000010  00000-0  00000+0 0  9995
2  3307 120.8370 104.0596 0017394 283.5451  76.3213  6.42461871352194

Epoch: 2026-02-24T12:38Z

TLE epoch observation values (Epoch: 2026-02-24T12:38:55.596Z)

Latitude

-0.00007°

Longitude

119.92271°

Altitude

5,840.513 km

Speed

5.713 km/s

True Right ascension

06h 56m 14s

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

21:50:45

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

5,865.536 km

Perigee altitude

5,823.017 km

Semi-major axis

12,222.414 km

Eccentricity

0.00174

Inclination

120.837°

RAAN

104.0596°

Arg. of periapsis

283.5451°

True anomaly

76.51507°

Mean anomaly

76.3213°

Eccentric anomaly

76.41817°

Mean motion

1.60623 °/min

Orbital period

224.13 mins

BSTAR

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Other satellites on launch #55 in the year 1968 (1968-07-04 UTC)

DELTA 1 DEB, 27480

EXPLORER 38 DEB, 3848

EXPLORER 38 DEB, 28608

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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 38 (RAE-A) 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.
52 mins	2026-02-25 19:15:42.313Z	48.336° ENE	2026-02-25 19:41:42.313Z	336.489° NNW	41.146°	2026-02-25 20:07:42.313Z	265.414° W
50 mins	2026-02-25 22:37:42.313Z	85.465° E	2026-02-25 23:01:42.313Z	18.141° NNE	39.953°	2026-02-25 23:27:42.313Z	307.953° NW
54 mins	2026-02-26 01:59:42.313Z	144.961° SSE	2026-02-26 02:25:42.313Z	224.788° SW	43.922°	2026-02-26 02:53:42.313Z	318.464° NNW
22 mins	2026-02-26 05:46:42.313Z	229.767° WSW	2026-02-26 05:56:42.313Z	253.557° W	13.625°	2026-02-26 06:08:42.313Z	281.98° WNW
48 mins	2026-02-26 14:22:42.313Z	50.522° ENE	2026-02-26 14:46:42.313Z	114.694° SE	31.407°	2026-02-26 15:10:42.313Z	178.424° S
40 mins	2026-02-26 17:48:42.313Z	42.297° NE	2026-02-26 18:14:42.313Z	329.261° NNW	44.425°	2026-02-26 18:28:42.313Z	247.068° WSW

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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 38 (RAE-A), 3307 on other resources

View EXPLORER 38 (RAE-A), 3307 on NASA - NSSDCA Website

View EXPLORER 38 (RAE-A), 3307 on Heavens-Above

View EXPLORER 38 (RAE-A), 3307 on Keep Track

View EXPLORER 38 (RAE-A), 3307 on Celestrak

View EXPLORER 38 (RAE-A), 3307 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 38 (RAE-A), 3307

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 day ago

TLE from 1 day ago

TLE epoch observation values (Epoch: 2026-02-24T12:38:55.596Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #55 in the year 1968 (1968-07-04 UTC)

EXPLORER 38 (RAE-A) Visibility forecast

Co-orbital & Co-planar RSOs

Check out EXPLORER 38 (RAE-A), 3307 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 day ago