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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 embed code

<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

Country

Related business

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, 2.3 m

Radar Cross Section

2.996 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 14 hours ago

TLE from 14 hours ago

0 EXPLORER 27
1 01328U 65032A   25242.89702229  .00000063  00000-0  22111-3 0  9993
2 01328  41.1836 179.3565 0244600 236.4998 121.2163 13.38896148949427

Epoch: 2025-08-30T21:31Z

TLE epoch observation values (Epoch: 2025-08-30T21:31:42.725Z)

Latitude

-0.00001°

Longitude

-122.89627°

Altitude

1,211.173 km

Speed

7.203 km/s

True Right ascension

11h 57m 25s

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

03:01:04

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,298.749 km

Perigee altitude

932.163 km

Semi-major axis

7,493.593 km

Eccentricity

0.02446

Inclination

41.1836°

RAAN

179.3565°

Arg. of periapsis

236.4998°

True anomaly

123.57532°

Mean anomaly

121.2163°

Eccentric anomaly

122.39959°

Mean motion

3.34586 °/min

Orbital period

107.6 mins

BSTAR

0.00022111

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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°
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.
8 mins	2025-08-31 20:55:58.118Z	167.716° S	2025-08-31 20:59:58.118Z	136.993° SSE	15.729°	2025-08-31 21:03:58.118Z	105.245° ESE
14 mins	2025-08-31 22:46:58.118Z	217.384° SW	2025-08-31 22:52:58.118Z	154.256° SSE	37.496°	2025-08-31 23:00:58.118Z	77.679° E
15 mins	2025-09-01 00:39:58.118Z	256.783° W	2025-09-01 00:46:58.118Z	258.59° W	44.994°	2025-09-01 00:54:58.118Z	79.265° E
14 mins	2025-09-01 02:34:58.118Z	279.102° WNW	2025-09-01 02:40:58.118Z	309.735° NW	44.686°	2025-09-01 02:48:58.118Z	97.606° ESE
13 mins	2025-09-01 04:28:58.118Z	280.447° WNW	2025-09-01 04:34:58.118Z	216.462° SW	40.097°	2025-09-01 04:41:58.118Z	132.263° SE
8 mins	2025-09-01 06:23:58.118Z	260.313° W	2025-09-01 06:27:58.118Z	225.35° WSW	18.413°	2025-09-01 06:31:58.118Z	188.237° SSW