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: 1 day ago
TLE from 1 day ago
0 EXPLORER 30
1 01738U 65093A 25322.11514950 .00000147 00000-0 84398-4 0 9990
2 01738 59.7077 242.9121 0126852 198.4414 161.2005 14.41701283125950Epoch: 2025-11-18T02:45Z
TLE epoch observation values (Epoch: 2025-11-18T02:45:48.916Z)
Latitude
-0.00002°
Longitude
144.0524°
Altitude
840.15 km
Speed
7.389 km/s
True Right ascension
16h 11m 38s
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
01:31:08
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
842.605 km
Perigee altitude
661.707 km
Semi-major axis
7,130.293 km
Eccentricity
0.01269
Inclination
59.7077°
RAAN
242.9121°
Arg. of periapsis
198.4414°
True anomaly
161.662°
Mean anomaly
161.2005°
Eccentric anomaly
161.43194°
Mean motion
3.60481 °/min
Orbital period
99.87 mins
BSTAR
0.000084398
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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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2025-11-19 05:58:44.069Z | 296.453° NW | 2025-11-19 06:02:44.069Z | 232.833° WSW | 26.555° | 2025-11-19 06:05:44.069Z | 186.555° SSW |
| 9 mins | 2025-11-19 20:31:44.069Z | 207.728° SW | 2025-11-19 20:35:44.069Z | 111.896° ESE | 43.757° | 2025-11-19 20:40:44.069Z | 43.425° NE |
| 7 mins | 2025-11-19 22:16:44.069Z | 284.955° WNW | 2025-11-19 22:19:44.069Z | 328.251° NNW | 22.881° | 2025-11-19 22:23:44.069Z | 17.671° NNE |
| 7 mins | 2025-11-20 03:32:44.069Z | 345.55° N | 2025-11-20 03:35:44.069Z | 28.445° NE | 25.011° | 2025-11-20 03:39:44.069Z | 91.336° ESE |
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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