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EXPLORER 30, 1738

Orbit data source: Space-Track

EXPLORER 30, 1738 is a payload satellite owned by NRL (US) in LEO that was launched on Fri, 19 Nov 1965 UTC via an SCOUT X-4 launch vehicle from the Wallops Island (WLPIS). 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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<iframe src="https://www.satcat.com/sats-embedded/1738?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/1738?theme=dark&initialShowStats=false

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Identifier

1738, 1965-093A

Orbit

LEO

Country

Related business

United States Navy (US)

Manufacturer

NRL

Mission

Spacecraft

Bus & Motor

NRL 24", Unknown motor

Mass

57 kg wet, 57 kg dry

Launch date (UTC)

1965-11-19 (61 years ago)

Launch vehicle

SCOUT X-4

Launch site

Wallops Island (WLPIS)

Object type

Payload

Rocket body

Debris

Shape & HBR

SPHERE, 1.1 m

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 EXPLORER 30
1 01738U 65093A   26307.93182880  .00000004  00000-0  44785-4 0  9995
2 01738  59.7053 129.4247 0132185 159.8948 200.7367 14.41883092176541

Epoch: 2026-11-03T22:21Z

TLE epoch observation values (Epoch: 2026-11-03T22:21:50.008Z)

Latitude

-0.00004°

Longitude

110.7789°

Altitude

842.103 km

Speed

7.386 km/s

True Right ascension

08h 37m 41s

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

03:21:16

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

845.801 km

Perigee altitude

657.313 km

Semi-major axis

7,129.694 km

Eccentricity

0.01322

Inclination

59.7053°

RAAN

129.4247°

Arg. of periapsis

159.8948°

True anomaly

200.20855°

Mean anomaly

200.7367°

Eccentric anomaly

200.47181°

Mean motion

3.60526 °/min

Orbital period

99.85 mins

BSTAR

0.000044785

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Other satellites on launch #93 in the year 1965 (1965-11-19 UTC)

SCOUT X-4 DEB, 2013 (Decayed)

SCOUT X-4 DEB, 2088

SCOUT X-4 R/B, 1739

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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 30 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.
9 mins	2026-11-04 13:27:29.926Z	180.602° SSW	2026-11-04 13:32:29.926Z	113.527° SE	32.086°	2026-11-04 13:36:29.926Z	60.735° ENE
9 mins	2026-11-04 15:11:29.926Z	249.964° W	2026-11-04 15:15:29.926Z	315.924° NNW	43.409°	2026-11-04 15:20:29.926Z	28.074° NE
8 mins	2026-11-04 22:12:29.926Z	328.358° NNW	2026-11-04 22:15:29.926Z	15.163° NNE	63.835°	2026-11-04 22:20:29.926Z	131.835° SE

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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 30, 1738 on other resources

View EXPLORER 30, 1738 on NASA - NSSDCA Website

View EXPLORER 30, 1738 on Heavens-Above

View EXPLORER 30, 1738 on Keep Track

View EXPLORER 30, 1738 on Celestrak

View EXPLORER 30, 1738 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 30, 1738

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-11-03T22:21:50.008Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #93 in the year 1965 (1965-11-19 UTC)

EXPLORER 30 Visibility forecast

Co-orbital & Co-planar RSOs

Check out EXPLORER 30, 1738 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago