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: 13 hours ago
TLE from 13 hours ago
0 EXPLORER 30
1 1738U 65093A 25312.61417160 .00000197 00000-0 98196-4 0 9995
2 1738 59.7075 275.2282 0128167 189.6214 170.2368 14.41692623124583Epoch: 2025-11-08T14:44Z
TLE epoch observation values (Epoch: 2025-11-08T14:44:24.426Z)
Latitude
0.00001°
Longitude
6.08517°
Altitude
844.535 km
Speed
7.384 km/s
True Right ascension
18h 20m 54s
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
00:21:06
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
843.572 km
Perigee altitude
660.798 km
Semi-major axis
7,130.322 km
Eccentricity
0.01282
Inclination
59.7075°
RAAN
275.2282°
Arg. of periapsis
189.6214°
True anomaly
170.48198°
Mean anomaly
170.2368°
Eccentric anomaly
170.35977°
Mean motion
3.60479 °/min
Orbital period
99.87 mins
BSTAR
0.000098196
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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. |
|---|---|---|---|---|---|---|---|
| 6 mins | 2025-11-09 06:13:13.177Z | 353.617° N | 2025-11-09 06:16:13.177Z | 34.663° NE | 18.046° | 2025-11-09 06:19:13.177Z | 73.665° E |
| 8 mins | 2025-11-09 07:56:13.177Z | 320.535° NNW | 2025-11-09 08:00:13.177Z | 144.583° SSE | 44.886° | 2025-11-09 08:04:13.177Z | 142.048° SSE |
| 7 mins | 2025-11-09 22:30:13.177Z | 162.975° S | 2025-11-09 22:33:13.177Z | 120.653° SE | 24.805° | 2025-11-09 22:37:13.177Z | 66.976° ENE |
| 9 mins | 2025-11-10 00:12:13.177Z | 241.76° WSW | 2025-11-10 00:16:13.177Z | 300.809° NW | 38.131° | 2025-11-10 00:21:13.177Z | 28.955° NE |
| 4 mins | 2025-11-10 01:59:13.177Z | 311.904° NW | 2025-11-10 02:01:13.177Z | 335.555° NNW | 14.398° | 2025-11-10 02:03:13.177Z | 359.363° N |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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