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, 1.1 m
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 18 hours ago
TLE from 18 hours ago
0 EXPLORER 30
1 01738U 65093A 26258.14449926 -.00000024 00000-0 36979-4 0 9999
2 01738 59.7070 298.8288 0137163 116.2530 245.2679 14.41869283169369Epoch: 2026-09-15T03:28Z
TLE epoch observation values (Epoch: 2026-09-15T03:28:04.736Z)
Latitude
-0°
Longitude
-107.30559°
Altitude
795.861 km
Speed
7.434 km/s
True Right ascension
19h 55m 18s
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
14:30:23
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
849.396 km
Perigee altitude
653.809 km
Semi-major axis
7,129.739 km
Eccentricity
0.01372
Inclination
59.707°
RAAN
298.8288°
Arg. of periapsis
116.253°
True anomaly
243.85062°
Mean anomaly
245.2679°
Eccentric anomaly
244.55823°
Mean motion
3.60523 °/min
Orbital period
99.85 mins
BSTAR
0.000036979
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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 | 2026-09-16 04:34:22.808Z | 204.433° SW | 2026-09-16 04:38:22.808Z | 136.452° SSE | 63.941° | 2026-09-16 04:43:22.808Z | 45.35° ENE |
| 6 mins | 2026-09-16 06:19:22.808Z | 280.532° WNW | 2026-09-16 06:22:22.808Z | 325.983° NNW | 23.053° | 2026-09-16 06:25:22.808Z | 10.038° NNE |
| 5 mins | 2026-09-16 11:36:22.808Z | 1.976° NNE | 2026-09-16 11:38:22.808Z | 36.958° NE | 23.159° | 2026-09-16 11:41:22.808Z | 83.451° E |
| 7 mins | 2026-09-16 13:19:22.808Z | 304.252° NW | 2026-09-16 13:22:22.808Z | 214.039° SW | 54.213° | 2026-09-16 13:26:22.808Z | 158.197° 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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