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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

CYL + 4 ANT, 1.1 m

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 15 hours ago

TLE from 15 hours ago

0 EXPLORER 38 (RAE-A)
1 03307U 68055A   26256.28211613 -.00000010  00000-0  00000-0 0  9994
2 03307 120.8214 209.3744 0013767 287.3247  72.5850  6.42588908365099

Epoch: 2026-09-13T06:46Z

TLE epoch observation values (Epoch: 2026-09-13T06:46:14.833Z)

Latitude

0.00003°

Longitude

115.53357°

Altitude

5,838.881 km

Speed

5.714 km/s

True Right ascension

13h 57m 29s

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

14:00:33

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

5,859.489 km

Perigee altitude

5,825.84 km

Semi-major axis

12,220.801 km

Eccentricity

0.00138

Inclination

120.8214°

RAAN

209.3744°

Arg. of periapsis

287.3247°

True anomaly

72.7356°

Mean anomaly

72.585°

Eccentric anomaly

72.66029°

Mean motion

1.60655 °/min

Orbital period

224.08 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

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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.
51 mins	2026-09-13 21:36:29.416Z	176.226° S	2026-09-13 22:01:29.416Z	243.938° WSW	41.889°	2026-09-13 22:27:29.416Z	313.359° NW
9 mins	2026-09-14 06:46:29.416Z	94.013° ESE	2026-09-14 06:50:29.416Z	103.293° ESE	10.72°	2026-09-14 06:55:29.416Z	114.898° SE
54 mins	2026-09-14 09:55:29.416Z	42.558° NE	2026-09-14 10:22:29.416Z	131.708° SE	69.726°	2026-09-14 10:49:29.416Z	211.315° SW
51 mins	2026-09-14 13:21:29.416Z	49.748° ENE	2026-09-14 13:46:29.416Z	342.074° N	58.572°	2026-09-14 14:12:29.416Z	269.775° W
50 mins	2026-09-14 16:42:29.416Z	89.672° E	2026-09-14 17:07:29.416Z	16.905° NNE	58.687°	2026-09-14 17:32:29.416Z	310.268° NW
54 mins	2026-09-14 20:05:29.416Z	149.7° SSE	2026-09-14 20:31:29.416Z	229.846° WSW	69.36°	2026-09-14 20:59:29.416Z	318.301° NNW

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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: 15 hours ago

TLE from 15 hours ago

TLE epoch observation values (Epoch: 2026-09-13T06:46:14.833Z)

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: 15 hours ago