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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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Identifier
1738, 1965-093A
Orbit
LEO
Last TLE update
21 hours ago
Origin
Manufacturer
NRL
Mission
Civil Astronomy
Bus & Motor
NRL 24", Unknown motor
Mass
57 kg wet, 57 kg dry
Launch date (UTC)
1965-11-19 (60 years ago)
Launch vehicle
SCOUT X-4
Launch site
Wallops Island (WLPIS)
Object type
Payload
Rocket body
Debris
Shape & HBR
Sphere, 0.61 m
Radar Cross Section
0.292 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 21 hours ago
0 EXPLORER 30
1 01738U 65093A   25166.69399419  .00000152  00000-0  85193-4 0  9990
2 01738  59.7081  51.5254 0137893  61.6266 299.8595 14.41582084103548
Epoch: 2025-06-15T16:39Z
TLE epoch observation values (Epoch: 2025-06-15T16:39:21.098Z)
Latitude
-0.00003°
Longitude
-102.52794°
Altitude
706.857 km
Speed
7.528 km/s
True Right ascension
03h 26m 06s
True Declination
0° 00' 00"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
26.42218°
Longitude
57.76564°
Altitude
747.973 km
Speed
7.488 km/s
Apparent Right ascension
13h 11m 25s
Apparent Declination
-4° 49' 56"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
23:58:06
Azimuth
329.979° NNW
Elevation
-51.218°
Doppler factor
1
Orbital elements
Apogee altitude
850.876 km
Perigee altitude
654.222 km
Semi-major axis
7,130.686 km
Eccentricity
0.01379
Inclination
59.7081°
RAAN
51.5254°
Arg. of periapsis
61.6266°
True anomaly
Unknown
Mean anomaly
299.8595°
Eccentric anomaly
Unknown
Mean motion
3.60451 °/min
Orbital period
99.87 mins
BSTAR
0.000085193
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Other satellites on launch #93 in the year 1965 (1965-11-19 UTC)

EXPLORER 30 Visibility forecast

Observer location: undefined°, undefined°

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 mins2025-06-16 17:45:19.547Z189.993° SSW2025-06-16 17:49:19.547Z120.801° SE33.224°2025-06-16 17:53:19.547Z54.663° ENE
6 mins2025-06-16 19:30:19.547Z275.21° WNW2025-06-16 19:32:19.547Z311.04° NW25.176°2025-06-16 19:36:19.547Z17.534° NNE
5 mins2025-06-17 00:47:19.547Z9.816° NNE2025-06-17 00:49:19.547Z41.449° NE17.973°2025-06-17 00:52:19.547Z78.81° E
8 mins2025-06-17 02:29:19.547Z318.378° NNW2025-06-17 02:32:19.547Z298.795° NW43.828°2025-06-17 02:37:19.547Z145.041° SSE
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