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.
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
1738 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
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 25308.66119376 .00000079 00000-0 65504-4 0 9999
2 1738 59.7075 288.6739 0128719 185.9711 173.9800 14.41689493124012Epoch: 2025-11-04T15:52Z
TLE epoch observation values (Epoch: 2025-11-04T15:52:07.140Z)
Latitude
-0.00004°
Longitude
6.49911°
Altitude
845.737 km
Speed
7.383 km/s
True Right ascension
19h 14m 41s
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
01:05:00
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
843.976 km
Perigee altitude
660.414 km
Semi-major axis
7,130.332 km
Eccentricity
0.01287
Inclination
59.7075°
RAAN
288.6739°
Arg. of periapsis
185.9711°
True anomaly
174.13225°
Mean anomaly
173.98°
Eccentric anomaly
174.05637°
Mean motion
3.60478 °/min
Orbital period
99.87 mins
BSTAR
0.000065504
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #93 in the year 1965 (1965-11-19 UTC)
Did you know?
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
Loading observer location...
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 | 2025-11-05 07:20:43.956Z | 352.701° N | 2025-11-05 07:23:43.956Z | 32.928° NE | 17.628° | 2025-11-05 07:26:43.956Z | 72.159° E |
| 8 mins | 2025-11-05 09:03:43.956Z | 321.24° NNW | 2025-11-05 09:07:43.956Z | 82.469° E | 44.969° | 2025-11-05 09:11:43.956Z | 140.754° SSE |
| 7 mins | 2025-11-05 23:37:43.956Z | 163.429° S | 2025-11-05 23:40:43.956Z | 123.111° SE | 24.079° | 2025-11-05 23:44:43.956Z | 68.599° E |
| 9 mins | 2025-11-06 01:19:43.956Z | 240.146° WSW | 2025-11-06 01:23:43.956Z | 294.73° NW | 38.297° | 2025-11-06 01:28:43.956Z | 28.915° NE |
| 5 mins | 2025-11-06 03:06:43.956Z | 310.24° NW | 2025-11-06 03:08:43.956Z | 333.887° NNW | 14.517° | 2025-11-06 03:11:43.956Z | 8.288° NNE |
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 |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in ascending order |
|---|