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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: 6 hours ago

TLE from 6 hours ago

0 EXPLORER 38 (RAE-A)
1 03307U 68055A   26076.53817920 -.00000010  00000-0  00000-0 0  9995
2 03307 120.8232 115.0851 0019039 282.9436  76.9041  6.42477060353543

Epoch: 2026-03-17T12:54Z

TLE epoch observation values (Epoch: 2026-03-17T12:54:58.682Z)

Latitude

0.00004°

Longitude

106.2257°

Altitude

5,840.083 km

Speed

5.714 km/s

True Right ascension

07h 40m 20s

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

23:58:03

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

5,867.353 km

Perigee altitude

5,820.813 km

Semi-major axis

12,222.22 km

Eccentricity

0.0019

Inclination

120.8232°

RAAN

115.0851°

Arg. of periapsis

282.9436°

True anomaly

77.11671°

Mean anomaly

76.9041°

Eccentric anomaly

77.01039°

Mean motion

1.60627 °/min

Orbital period

224.12 mins

BSTAR

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

EXPLORER 38 DEB, 28608

EXPLORER 38 DEB, 3848

DELTA 1 DEB, 26672

DELTA 1 R/B, 3315

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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.
50 mins	2026-03-17 20:52:01.607Z	70.124° E	2026-03-17 21:17:01.607Z	4.341° NNE	38.316°	2026-03-17 21:42:01.607Z	297.342° NW
54 mins	2026-03-18 00:13:01.607Z	124.104° SE	2026-03-18 00:39:01.607Z	47.565° ENE	44.84°	2026-03-18 01:07:01.607Z	318.35° NNW
44 mins	2026-03-18 03:47:01.607Z	191.396° SSW	2026-03-18 04:08:01.607Z	246.738° WSW	27.881°	2026-03-18 04:31:01.607Z	306.554° NW
32 mins	2026-03-18 12:42:01.607Z	68.575° E	2026-03-18 12:58:01.607Z	107.557° ESE	17.945°	2026-03-18 13:14:01.607Z	146.436° SSE
55 mins	2026-03-18 16:01:01.607Z	41.347° NE	2026-03-18 16:28:01.607Z	123.556° SE	44.63°	2026-03-18 16:56:01.607Z	221.398° SW

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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: 6 hours ago

TLE from 6 hours ago

TLE epoch observation values (Epoch: 2026-03-17T12:54:58.682Z)

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: 6 hours ago