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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

19 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 19 hours ago

0 EXPLORER 27
1 01328U 65032A   25128.89634293 -.00000016  00000-0  10766-3 0  9993
2 01328  41.1846 307.1277 0244936   3.3141 356.9175 13.38885806934144

Epoch: 2025-05-08T21:30Z

Definitive object data (Epoch: 2025-05-08T21:30:44.029Z)

Latitude

0.00003°

Longitude

117.48402°

Altitude

929.85 km

Speed

7.478 km/s

True Right ascension

20h 28m 30s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

-6.3864°

Longitude

-58.56403°

Altitude

1,297.424 km

Speed

7.12 km/s

Apparent Right ascension

10h 11m 15s

Apparent Declination

-23° 55' 38"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

00:32:06

Azimuth

72.308° E

Elevation

-56.411°

Doppler factor

Orbital elements

Apogee altitude

1,299.041 km

Perigee altitude

931.949 km

Semi-major axis

7,493.632 km

Eccentricity

0.0244936

Inclination

41.1846°

RAAN

307.1277°

Arg. of periapsis

3.3141°

True anomaly

356.76182°

Mean anomaly

356.9175°

Eccentric anomaly

356.84014°

Mean motion

3.34584 °/min

BSTAR

0.00010766

Orbital period

107.6 mins

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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.
13 mins	2025-05-09 17:30:38.486Z	267.366° W	2025-05-09 17:36:38.486Z	310.93° NW	44.465°	2025-05-09 17:43:38.486Z	83.559° E
13 mins	2025-05-09 19:25:38.486Z	281.71° WNW	2025-05-09 19:30:38.486Z	246.449° WSW	44.666°	2025-05-09 19:38:38.486Z	108.419° ESE
12 mins	2025-05-09 21:19:38.486Z	271.107° WNW	2025-05-09 21:24:38.486Z	209.926° SW	33.364°	2025-05-09 21:31:38.486Z	146.118° SSE
4 mins	2025-05-10 13:04:38.486Z	153.368° SSE	2025-05-10 13:06:38.486Z	132.4° SE	14.065°	2025-05-10 13:08:38.486Z	112.566° SE
10 mins	2025-05-10 14:54:38.486Z	219.144° SW	2025-05-10 14:58:38.486Z	158.325° S	37.818°	2025-05-10 15:04:38.486Z	80.113° E

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.