2 years (achieved) 58 years and 7 months (in orbit)
Spacecraft properties
Spacecraft
Exlorer XXIX
Manufacturer
Johns Hopkins University Applied Physics Laboratory[1]
Launch mass
387 kg (853 lb)
Start of mission
Launch date
6 November 1965, 18:38:43 GMT[2]
Rocket
Thor-Delta E (Thor 457 / Delta 034)
Launch site
Cape Canaveral, LC-17B
Contractor
Douglas Aircraft Company
Entered service
6 November 1965
End of mission
Last contact
15 January 1968
Orbital parameters
Reference system
Geocentric orbit[3]
Regime
Low Earth orbit
Perigee altitude
1,113 km (692 mi)
Apogee altitude
2,275 km (1,414 mi)
Inclination
59.40°
Period
120.30 minutes
Instruments
Laser Tracking Reflectors NASA Minitrack System Optical Beacon System Radio Doppler System Radio Range/Rate System SECOR Range Transponder
Explorer program
← Explorer 28
Explorer 30 →
Explorer 29, also called GEOS 1 or GEOS A, acronym to Geodetic Earth Orbiting Satellite, was a NASA satellite launched as part of the Explorer program, being the first of the two satellites GEOS. Explorer 29 was launched on 6 November 1965 from Cape Canaveral, Florida, with a Thor-Delta E launch vehicle.[4]
Explorer 29 was a gravity-gradient-stabilized, solar cell powered unit designed exclusively for geodetic studies. It was the first successful active spacecraft of the National Geodetic Satellite Program.[4]
^"GEOS". Encyclopedia Astronautica. Archived from the original on 27 September 2016. Retrieved 9 November 2021.
^McDowell, Jonathan (21 July 2021). "Launch Log". Jonathan's Space Report. Retrieved 9 November 2021.
^"Trajectory: Explorer 29 (GEOS 1) 1965-089A". NASA. 28 October 2021. Retrieved 9 November 2021. This article incorporates text from this source, which is in the public domain.
^ abCite error: The named reference Display was invoked but never defined (see the help page).
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Global Information
This article incorporates text from this source, which is in the public domain.
