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EXPLORER 27, 1328

Orbit data source: Space-Track

EXPLORER 27, 1328 is a payload satellite owned by GSFC (US) in LEO that was launched on Thu, 29 Apr 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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<iframe src="https://www.satcat.com/sats-embedded/1328?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/1328?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

1328, 1965-032A

Orbit

LEO

Last TLE update

7 hours ago

Origin

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

APL

Mission

Civil Science

Bus & Motor

TRANSIT 5, Unknown motor

Mass

55 kg wet, 55 kg dry

Launch date (UTC)

1965-04-29 (60 years ago)

Launch vehicle

SCOUT X-4

Launch site

Wallops Island (WLPIS)

Object type

Payload

Rocket body

Debris

Shape & HBR

Oct Cyl + 4 Pan + 4 Rod, 4.6 m

Radar Cross Section

2.996 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 7 hours ago

0 EXPLORER 27
1 01328U 65032A   25195.59595528 -.00000073  00000-0  17089-4 0  9990
2 01328  41.1856  21.7438 0244453 350.1872   9.4162 13.38892103943088

Epoch: 2025-07-14T14:18Z

TLE epoch observation values (Epoch: 2025-07-14T14:18:10.536Z)

Latitude

0.00003°

Longitude

-125.50262°

Altitude

932.503 km

Speed

7.475 km/s

True Right ascension

01h 26m 58s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-41.31997°

Longitude

144.94516°

Altitude

1,091.097 km

Speed

7.324 km/s

Apparent Right ascension

20h 26m 54s

Apparent Declination

-41° 33' 44"

Sunlit

Object is in full shadow

Visualization observer readout

Local Sidereal Time

09:33:48

Azimuth

102.83° ESE

Elevation

-77.241°

Doppler factor

Orbital elements

Apogee altitude

1,298.654 km

Perigee altitude

932.287 km

Semi-major axis

7,493.608 km

Eccentricity

0.02445

Inclination

41.1856°

RAAN

21.7438°

Arg. of periapsis

350.1872°

True anomaly

Unknown

Mean anomaly

9.4162°

Eccentric anomaly

Unknown

Mean motion

3.34585 °/min

Orbital period

107.6 mins

BSTAR

0.000017089

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Other satellites on launch #32 in the year 1965 (1965-04-29 UTC)

SCOUT X-4 R/B, 1358

SCOUT X-4 DEB, 1995 (Decayed)

SCOUT X-4 DEB, 2011

EXPLORER 27 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.
14 mins	2025-07-14 21:58:22.204Z	278.719° WNW	2025-07-14 22:05:22.204Z	201.332° SSW	35.224°	2025-07-14 22:12:22.204Z	142.209° SSE
6 mins	2025-07-14 23:55:22.204Z	244.575° WSW	2025-07-14 23:57:22.204Z	228.823° WSW	13.751°	2025-07-15 00:01:22.204Z	198.509° SSW
11 mins	2025-07-15 15:34:22.204Z	216.583° SW	2025-07-15 15:39:22.204Z	138.729° SSE	36.38°	2025-07-15 15:45:22.204Z	79.232° E
12 mins	2025-07-15 17:27:22.204Z	259.88° W	2025-07-15 17:32:22.204Z	322.174° NNW	44.97°	2025-07-15 17:39:22.204Z	79.886° E
13 mins	2025-07-15 19:20:22.204Z	279.993° WNW	2025-07-15 19:26:22.204Z	338.027° N	44.938°	2025-07-15 19:33:22.204Z	99.505° ESE

Authenticating...

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Check out EXPLORER 27, 1328 on other resources

View EXPLORER 27, 1328 on NASA - NSSDCA Website

View EXPLORER 27, 1328 on Heavens-Above

View EXPLORER 27, 1328 on Keep Track

View EXPLORER 27, 1328 on Celestrak

View EXPLORER 27, 1328 on Gunter's Space Page

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