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
Civil Astronomy
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, 0.3 m
Radar Cross Section
0.292 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 17 hours ago
TLE from 17 hours ago
0 EXPLORER 30
1 01738U 65093A 25260.25371644 .00000157 00000-0 86890-4 0 9997
2 01738 59.7059 93.3214 0135253 142.4604 218.5973 14.41632303117032Epoch: 2025-09-17T06:05Z
TLE epoch observation values (Epoch: 2025-09-17T06:05:21.1Z)
Latitude
0.00002°
Longitude
5.55118°
Altitude
830.511 km
Speed
7.399 km/s
True Right ascension
06h 13m 17s
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
15:37:29
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
848.826 km
Perigee altitude
655.942 km
Semi-major axis
7,130.521 km
Eccentricity
0.01353
Inclination
59.7059°
RAAN
93.3214°
Arg. of periapsis
142.4604°
True anomaly
217.64308°
Mean anomaly
218.5973°
Eccentric anomaly
218.11893°
Mean motion
3.60463 °/min
Orbital period
99.87 mins
BSTAR
0.00008689
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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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2025-09-17 23:16:29.242Z | 319.821° NNW | 2025-09-17 23:20:29.242Z | 255.804° W | 44.958° | 2025-09-17 23:24:29.242Z | 143.204° SSE |
| 7 mins | 2025-09-18 13:51:29.242Z | 161.757° S | 2025-09-18 13:54:29.242Z | 115.264° SE | 24.231° | 2025-09-18 13:58:29.242Z | 63.764° ENE |
| 8 mins | 2025-09-18 15:33:29.242Z | 244.324° WSW | 2025-09-18 15:37:29.242Z | 314.406° NW | 36.899° | 2025-09-18 15:41:29.242Z | 25.907° NE |
| 7 mins | 2025-09-18 22:34:29.242Z | 332.074° NNW | 2025-09-18 22:37:29.242Z | 27.14° NE | 39.646° | 2025-09-18 22:41:29.242Z | 123.686° SE |
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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