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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1738 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Spacecraft
Bus & Motor
NRL 24", Unknown motor
Mass
57 kg wet, 57 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 11 hours ago
TLE from 11 hours ago
0 EXPLORER 30
1 1738U 65093A 26138.31903404 -.00000022 00000-0 37549-4 0 9993
2 1738 59.7084 346.5190 0131124 11.9766 348.4338 14.41823439152082Epoch: 2026-05-18T07:39Z
TLE epoch observation values (Epoch: 2026-05-18T07:39:24.541Z)
Latitude
-0.00002°
Longitude
-4.34227°
Altitude
662.438 km
Speed
7.575 km/s
True Right ascension
23h 06m 04s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
03:01:41
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
845.243 km
Perigee altitude
658.263 km
Semi-major axis
7,129.89 km
Eccentricity
0.01311
Inclination
59.7084°
RAAN
346.519°
Arg. of periapsis
11.9766°
True anomaly
348.12762°
Mean anomaly
348.4338°
Eccentric anomaly
348.28121°
Mean motion
3.60511 °/min
Orbital period
99.86 mins
BSTAR
0.000037549
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Other satellites on launch #93 in the year 1965 (1965-11-19 UTC)
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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.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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-05-18 23:08:23.292Z | 343.548° N | 2026-05-18 23:12:23.292Z | 51.697° ENE | 29.226° | 2026-05-18 23:16:23.292Z | 103.296° ESE |
| 8 mins | 2026-05-19 00:52:23.292Z | 296.56° NW | 2026-05-19 00:55:23.292Z | 239.35° WSW | 34.492° | 2026-05-19 01:00:23.292Z | 168.79° S |
| 8 mins | 2026-05-19 15:25:23.292Z | 195.681° SSW | 2026-05-19 15:28:23.292Z | 143.58° SSE | 37.831° | 2026-05-19 15:33:23.292Z | 48.624° ENE |
| 6 mins | 2026-05-19 17:10:23.292Z | 286.849° WNW | 2026-05-19 17:12:23.292Z | 322.526° NNW | 23.058° | 2026-05-19 17:16:23.292Z | 18.563° NNE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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