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: 6 hours ago
TLE from 6 hours ago
0 EXPLORER 30
1 1738U 65093A 25342.85072066 .00000393 00000-0 15291-3 0 9998
2 1738 59.7062 172.3842 0124240 218.0175 141.2047 14.41716083128942Epoch: 2025-12-08T20:25Z
TLE epoch observation values (Epoch: 2025-12-08T20:25:02.265Z)
Latitude
0.00003°
Longitude
148.28095°
Altitude
823.826 km
Speed
7.406 km/s
True Right ascension
11h 29m 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
01:01:38
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
840.694 km
Perigee altitude
663.521 km
Semi-major axis
7,130.245 km
Eccentricity
0.01242
Inclination
59.7062°
RAAN
172.3842°
Arg. of periapsis
218.0175°
True anomaly
142.08599°
Mean anomaly
141.2047°
Eccentric anomaly
141.64641°
Mean motion
3.60484 °/min
Orbital period
99.87 mins
BSTAR
0.00015291
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Other satellites on launch #93 in the year 1965 (1965-11-19 UTC)
Did you know?
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 | 2025-12-09 13:12:41.553Z | 129.376° SE | 2025-12-09 13:14:41.553Z | 107.295° ESE | 12.733° | 2025-12-09 13:16:41.553Z | 86.449° E |
| 9 mins | 2025-12-09 14:52:41.553Z | 214.437° SW | 2025-12-09 14:56:41.553Z | 179.39° S | 44.585° | 2025-12-09 15:01:41.553Z | 41.103° NE |
| 7 mins | 2025-12-09 16:37:41.553Z | 283.553° WNW | 2025-12-09 16:40:41.553Z | 321.216° NNW | 21.395° | 2025-12-09 16:44:41.553Z | 13.012° NNE |
| 7 mins | 2025-12-09 21:54:41.553Z | 347.842° N | 2025-12-09 21:57:41.553Z | 37.822° NE | 28.2° | 2025-12-09 22:01:41.553Z | 98.499° ESE |
| 8 mins | 2025-12-09 23:37:41.553Z | 302.196° NW | 2025-12-09 23:41:41.553Z | 224.613° SW | 34.125° | 2025-12-09 23:45:41.553Z | 168.721° S |
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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