MESSENGER

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MESSENGER
MESSENGER - spacecraft at mercury - atmercury lg.jpg
Airtist's renderin o MESSENGER orbitin Mercur.
Mission teepMercur probe
OperatorNASA / APL
COSPAR ID2004-030A
SATCAT no.28391
Wabsteixmessenger.jhuapl.edu
Mission durationTot:
10 years, 8 months an 28 days
At Mercury:
4 years, 1 month an 14 days
En route: 7 years
Primar mission: 1 year
First extension: 1 year[1][2]
Seicont extension: 2 years[3][4]
Spacecraft properties
ManufacturerApplied Physics Laboratory
Launch mass1,107.9 kg (2,443 lb)
Pouer450 watts
Stairt o mission
Launch dateAugust 3, 2004, 06:15:56 (2004-08-03UTC06:15:56Z) UTC
RocketDelta II 7925H-9.5
Launch steidCape Canaveral SLC-17B
Entered serviceAprile 4, 2011
End of mission
DisposalDeorbited
DestroyedAprile 30, 2015
Orbital parameters
Reference seestemHermiocentric
Perihermion118.4
Inclination80
Period12 oors
EpochJan 1, 2000[5]
Fleebi o Earth (gravity assist)
Closest approachAugust 2, 2005
Fleebi o Venus (gravity assist)
Closest approachOctober 24, 2006
Fleebi o Venus (gravity assist)
Closest approachJuin 5, 2007
Fleebi o Mercur
Closest approachJanuar 14, 2008
Fleebi o Mercur
Closest approachOctober 6, 2008
Fleebi o Mercur
Closest approachSeptember 29, 2009
Mercur orbiter
Orbital insertionMairch 18, 2011, 01:00 UTC[6]
MESSENGER mission emblem.png  

MESSENGER (a backronym o MErcury Surface, Space ENvironment, GEochemistry, and Ranging, an a reference tae the Roman meethological messenger, Mercury) wis a NASA robotic spacecraft that orbited the planet Mercur atween 2011 an 2015.[7][8]

References[eedit | eedit soorce]

  1. "NASA extends spacecraft's Mercury mission". UPI. November 15, 2011. Retrieved December 20, 2012.
  2. "MESSENGER Completes Its First Extended Mission at Mercury". JHU – APL. March 18, 2013. Retrieved July 8, 2013.
  3. Wu, Brian (April 3, 2015). "NASA Set to Extend Mercury Mission for Another Month". Johns Hopkins University APL. The Science Times. Retrieved April 4, 2015.
  4. "MESSENGER's Operations at Mercury Extended". Johns Hopkins University APL. SpaceRef.com. April 3, 2015. Retrieved April 4, 2015.
  5. Domingue, D.L.; Russell, C.T.; Domingue, editors ; foreword by D.L.; Russell, C.T. (2007). Messenger mission to Mercury (1st ed.). New York: Springer. pp. 225–245. ISBN 9780387772141.CS1 maint: extra text: authors leet (link)
  6. Lee, Jimmy; Galuska, Mike (March 18, 2011). "NASA Chats - MESSENGER Prepares to Orbit Mercury". NASA. Archived frae the oreeginal on June 7, 2011. Retrieved March 18, 2011.
  7. "NASA Spacecraft Circling Mercury". New York Times. March 17, 2011. Retrieved July 9, 2013.
  8. Wendel, J. (April 2015). "Mercury's secrets revealed by soon-to-crash spacecraft". Eos. 96. doi:10.1029/2015EO029165.