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
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 15 hours ago
TLE from 15 hours ago
0 EXPLORER 30
1 01738U 65093A 26048.16953695 .00000111 00000-0 74461-4 0 9995
2 01738 59.7085 293.1971 0121151 286.7526 72.0247 14.41778463139082Epoch: 2026-02-17T04:04Z
TLE epoch observation values (Epoch: 2026-02-17T04:04:07.992Z)
Latitude
-0.00005°
Longitude
85.01038°
Altitude
728.433 km
Speed
7.505 km/s
True Right ascension
19h 32m 47s
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
21:34:39
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
838.283 km
Perigee altitude
665.521 km
Semi-major axis
7,130.039 km
Eccentricity
0.01212
Inclination
59.7085°
RAAN
293.1971°
Arg. of periapsis
286.7526°
True anomaly
73.35131°
Mean anomaly
72.0247°
Eccentric anomaly
72.6874°
Mean motion
3.605 °/min
Orbital period
99.86 mins
BSTAR
0.000074461
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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. |
|---|---|---|---|---|---|---|---|
| 10 mins | 2026-02-17 19:13:06.246Z | 246.954° WSW | 2026-02-17 19:18:06.246Z | 322.296° NNW | 34.313° | 2026-02-17 19:23:06.246Z | 28.399° NE |
| 4 mins | 2026-02-17 21:01:06.246Z | 319.58° NNW | 2026-02-17 21:03:06.246Z | 342.494° N | 13.428° | 2026-02-17 21:05:06.246Z | 4.426° NNE |
| 6 mins | 2026-02-18 00:32:06.246Z | 357.318° N | 2026-02-18 00:35:06.246Z | 35.859° NE | 18.261° | 2026-02-18 00:38:06.246Z | 70.111° E |
| 9 mins | 2026-02-18 02:15:06.246Z | 326.221° NNW | 2026-02-18 02:19:06.246Z | 61.787° ENE | 43.912° | 2026-02-18 02:24:06.246Z | 134.297° SE |
| 5 mins | 2026-02-18 04:00:06.246Z | 268.362° W | 2026-02-18 04:02:06.246Z | 242.414° WSW | 17.321° | 2026-02-18 04:05:06.246Z | 207.725° SW |
| 5 mins | 2026-02-18 16:50:06.246Z | 142.69° SSE | 2026-02-18 16:52:06.246Z | 113.985° SE | 19.251° | 2026-02-18 16:55:06.246Z | 75.876° E |
| 9 mins | 2026-02-18 18:31:06.246Z | 234.491° WSW | 2026-02-18 18:35:06.246Z | 321.433° NNW | 41.897° | 2026-02-18 18:40:06.246Z | 33.704° NE |
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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