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
SPHERE, 0.3 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 14 hours ago
TLE from 14 hours ago
0 EXPLORER 30
1 01738U 65093A 26253.49857675 -.00000020 00000-0 38087-4 0 9994
2 01738 59.7080 314.6369 0137433 112.2401 249.3280 14.41868030168697Epoch: 2026-09-10T11:57Z
TLE epoch observation values (Epoch: 2026-09-10T11:57:57.031Z)
Latitude
0.00001°
Longitude
145.61386°
Altitude
789.614 km
Speed
7.441 km/s
True Right ascension
20h 58m 32s
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
18:04:58
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
849.593 km
Perigee altitude
653.62 km
Semi-major axis
7,129.743 km
Eccentricity
0.01374
Inclination
59.708°
RAAN
314.6369°
Arg. of periapsis
112.2401°
True anomaly
247.86357°
Mean anomaly
249.328°
Eccentric anomaly
248.59488°
Mean motion
3.60522 °/min
Orbital period
99.86 mins
BSTAR
0.000038087
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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. |
|---|---|---|---|---|---|---|---|
| 4 mins | 2026-09-11 04:45:01.997Z | 138.334° SSE | 2026-09-11 04:47:01.997Z | 113.86° SE | 13.675° | 2026-09-11 04:49:01.997Z | 89.279° E |
| 8 mins | 2026-09-11 06:26:01.997Z | 222.843° SW | 2026-09-11 06:30:01.997Z | 356.633° N | 77.371° | 2026-09-11 06:34:01.997Z | 37.158° NE |
| 4 mins | 2026-09-11 08:12:01.997Z | 303.461° NW | 2026-09-11 08:14:01.997Z | 332.045° NNW | 16.746° | 2026-09-11 08:16:01.997Z | 359.654° N |
| 7 mins | 2026-09-11 13:27:01.997Z | 347.883° N | 2026-09-11 13:30:01.997Z | 47.542° ENE | 32.975° | 2026-09-11 13:34:01.997Z | 106.183° ESE |
| 7 mins | 2026-09-11 15:10:01.997Z | 295.128° NW | 2026-09-11 15:13:01.997Z | 241.206° WSW | 33.72° | 2026-09-11 15:17:01.997Z | 176.786° S |
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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