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: 12 hours ago
TLE from 12 hours ago
0 EXPLORER 30
1 1738U 65093A 25296.10870984 .00000224 00000-0 10541-3 0 9995
2 1738 59.7085 331.3703 0130541 174.4998 185.7511 14.41681354122203Epoch: 2025-10-23T02:36Z
TLE epoch observation values (Epoch: 2025-10-23T02:36:32.530Z)
Latitude
0.00004°
Longitude
-99.53791°
Altitude
847.101 km
Speed
7.382 km/s
True Right ascension
22h 05m 28s
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
09:25:22
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
845.302 km
Perigee altitude
659.141 km
Semi-major axis
7,130.359 km
Eccentricity
0.01305
Inclination
59.7085°
RAAN
331.3703°
Arg. of periapsis
174.4998°
True anomaly
185.6036°
Mean anomaly
185.7511°
Eccentric anomaly
185.67711°
Mean motion
3.60476 °/min
Orbital period
99.87 mins
BSTAR
0.00010541
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2025-10-24 03:41:50.449Z | 184.985° SSW | 2025-10-24 03:46:50.449Z | 113.073° SE | 31.267° | 2025-10-24 03:50:50.449Z | 58.297° ENE |
| 9 mins | 2025-10-24 05:25:50.449Z | 254.166° W | 2025-10-24 05:29:50.449Z | 314.542° NW | 32.324° | 2025-10-24 05:34:50.449Z | 26.214° NE |
| 4 mins | 2025-10-24 10:44:50.449Z | 8.481° NNE | 2025-10-24 10:45:50.449Z | 22.559° NE | 16.191° | 2025-10-24 10:48:50.449Z | 63.831° ENE |
| 8 mins | 2025-10-24 12:26:50.449Z | 323.816° NNW | 2025-10-24 12:30:50.449Z | 102.969° ESE | 43.801° | 2025-10-24 12:34:50.449Z | 137.235° SSE |
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 ascending order |
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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