Showing default

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.

Loading next visibility...

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/1738?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/1738?theme=dark&initialShowStats=false

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

ISO8601 Format

Identifier

1738, 1965-093A

Orbit

LEO

Country

Related business

United States Navy (US)

Manufacturer

NRL

Mission

Spacecraft

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

Unknown

Radar Cross Section

Medium (>0.1 m² and <1 m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 EXPLORER 30
1 01738U 65093A   26127.84796555  .00000069  00000-0  62676-4 0  9995
2 01738  59.7092  22.1421 0129723   2.4674 357.6976 14.41820198150571

Epoch: 2026-05-07T20:21Z

TLE epoch observation values (Epoch: 2026-05-07T20:21:04.223Z)

Latitude

0.00002°

Longitude

-148.81371°

Altitude

661.576 km

Speed

7.576 km/s

True Right ascension

01h 28m 34s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

13:18:16

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

844.255 km

Perigee altitude

659.273 km

Semi-major axis

7,129.901 km

Eccentricity

0.01297

Inclination

59.7092°

RAAN

22.1421°

Arg. of periapsis

2.4674°

True anomaly

357.6369°

Mean anomaly

357.6976°

Eccentric anomaly

357.66735°

Mean motion

3.60511 °/min

Orbital period

99.86 mins

BSTAR

0.000062676

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

Other satellites on launch #93 in the year 1965 (1965-11-19 UTC)

SCOUT X-4 R/B, 1739

SCOUT X-4 DEB, 2013 (Decayed)

SCOUT X-4 DEB, 2088

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.

Click here to try in Sandbox

EXPLORER 30 Visibility forecast

Loading observer location...
Set 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.
7 mins	2026-05-08 18:07:31.793Z	170.739° S	2026-05-08 18:10:31.793Z	119.425° SE	26.062°	2026-05-08 18:14:31.793Z	61.053° ENE
7 mins	2026-05-08 19:50:31.793Z	255.987° W	2026-05-08 19:53:31.793Z	310.557° NW	32.046°	2026-05-08 19:57:31.793Z	22.224° NNE
6 mins	2026-05-09 01:07:31.793Z	357.611° N	2026-05-09 01:10:31.793Z	36.915° NE	17.043°	2026-05-09 01:13:31.793Z	70.995° E
9 mins	2026-05-09 02:50:31.793Z	326.507° NNW	2026-05-09 02:54:31.793Z	73.38° E	43.645°	2026-05-09 02:59:31.793Z	134.305° SE
5 mins	2026-05-09 04:35:31.793Z	266.852° W	2026-05-09 04:37:31.793Z	240.519° WSW	17.302°	2026-05-09 04:40:31.793Z	206.493° SW

Items per page:

1–5 of 5 items

of 1 page

Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

Please sign-in to view Co-orbital & Co-planar RSOs.

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

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 descending order

Check out EXPLORER 30, 1738 on other resources

View EXPLORER 30, 1738 on NASA - NSSDCA Website

View EXPLORER 30, 1738 on Heavens-Above

View EXPLORER 30, 1738 on Keep Track

View EXPLORER 30, 1738 on Celestrak

View EXPLORER 30, 1738 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

EXPLORER 30, 1738

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-05-07T20:21:04.223Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #93 in the year 1965 (1965-11-19 UTC)

EXPLORER 30 Visibility forecast

Co-orbital & Co-planar RSOs

Check out EXPLORER 30, 1738 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago