Johns Hopkins University Applied Physics Laboratory
Launch mass
60.8 kg (134 lb)
Dimensions
30 × 45 cm (12 × 18 in)
Power
4 deployable solar arrays and batteries
Start of mission
Launch date
29 April 1965, 14:17:00 GMT
Rocket
Scout X-4 (S-136R)
Launch site
Wallops Flight Facility,
Contractor
Vought
Entered service
29 April 1965
End of mission
Last contact
20 July 1973
Orbital parameters
Reference system
Geocentric orbit[1]
Regime
Low Earth orbit
Perigee altitude
927 km (576 mi)
Apogee altitude
1,320 km (820 mi)
Inclination
41.10°
Period
107.70 minutes
Instruments
Langmuir probes Laser Tracking Reflectors Radio Beacon Radio Doppler System
Explorer program
← Explorer 26
Explorer 28 →
Explorer 27 (or BE-C or Beacon Explorer-C, Beacon-C or S-66C) was a small NASA satellite, launched in 1965, designed to conduct scientific research in the ionosphere.[2] It was powered by 4 solar panels. One goal of the mission was to study in detail the shape of the Earth by way of investigating variations in its
gravitational field.[3] It was the third and last of the Beacons in the Explorers program. The satellite was shut off in July 1973 so that its transmission band could be used by higher-priority spacecraft.[2]
^"Trajectory: Explorer 27 (BE-C) 1965-032A". NASA. 28 October 2021. Retrieved 8 November 2021. This article incorporates text from this source, which is in the public domain.
^ ab"Display: Explorer 27 (BE-C) 1965-032A". NASA. 28 October 2021. Retrieved 8 November 2021. This article incorporates text from this source, which is in the public domain.
^"Explorer Series of Spacecraft". NASA. Retrieved 12 April 2018.
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Global Information
This article incorporates text from this source, which is in the public domain.
