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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Edit Public Description
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: 21 hours ago
TLE from 21 hours ago
0 EXPLORER 30
1 01738U 65093A 25352.83700102 .00000136 00000-0 81607-4 0 9996
2 01738 59.7069 138.4166 0123182 227.6145 131.4417 14.41724183130381Epoch: 2025-12-18T20:05Z
TLE epoch observation values (Epoch: 2025-12-18T20:05:16.888Z)
Latitude
0.00008°
Longitude
109.4095°
Altitude
813.062 km
Speed
7.417 km/s
True Right ascension
09h 13m 39s
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
16:17:48
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
839.912 km
Perigee altitude
664.249 km
Semi-major axis
7,130.218 km
Eccentricity
0.01232
Inclination
59.7069°
RAAN
138.4166°
Arg. of periapsis
227.6145°
True anomaly
132.48911°
Mean anomaly
131.4417°
Eccentric anomaly
131.96647°
Mean motion
3.60486 °/min
Orbital period
99.87 mins
BSTAR
0.000081607
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2025-12-19 18:13:02.083Z | 351.581° N | 2025-12-19 18:16:02.083Z | 28.955° NE | 17.934° | 2025-12-19 18:19:02.083Z | 67.077° ENE |
| 9 mins | 2025-12-19 19:56:02.083Z | 323.838° NNW | 2025-12-19 20:00:02.083Z | 9.881° NNE | 43.994° | 2025-12-19 20:05:02.083Z | 136.251° SSE |
| 7 mins | 2025-12-20 10:30:02.083Z | 159.586° S | 2025-12-20 10:33:02.083Z | 122.022° SE | 21.668° | 2025-12-20 10:37:02.083Z | 70.936° E |
| 10 mins | 2025-12-20 12:12:02.083Z | 235.476° WSW | 2025-12-20 12:16:02.083Z | 290.811° WNW | 40.691° | 2025-12-20 12:22:02.083Z | 33.622° NE |
| 5 mins | 2025-12-20 13:59:02.083Z | 309.243° NW | 2025-12-20 14:01:02.083Z | 333.714° NNW | 16.413° | 2025-12-20 14:04:02.083Z | 8.372° NNE |
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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