MESSENGER

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MESSENGER
MESSENGER - spacecraft at mercury - atmercury lg.jpg
Airtist's renderin o MESSENGER orbitin Mercur.
Mission type Mercur probe
Operator NASA / APL
COSPAR ID 2004-030A
SATCAT № 28391
Wabsteid messenger.jhuapl.edu
Mission duration Tot:
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
Manufacturer Applied Physics Laboratory
Launch mass 1,107.9 kg (2,443 lb)
Pouer 450 watts
Start o mission
Launch date August 3, 2004, 06:15:56 (2004-08-03UTC06:15:56Z) UTC
Rocket Delta II 7925H-9.5
Launch steid Cape Canaveral SLC-17B
Enterit service Aprile 4, 2011
End o mission
Disposal Deorbited
Destroyed Aprile 30, 2015
Orbital parameters
Reference seestem Hermiocentric
Perihermion 118.4
Inclination 80
Period 12 oors
Epoch Jan 1, 2000[5]
Fleebi o Earth (gravity assist)
Closest approach August 2, 2005
Fleebi o Venus (gravity assist)
Closest approach October 24, 2006
Fleebi o Venus (gravity assist)
Closest approach Juin 5, 2007
Fleebi o Mercur
Closest approach Januar 14, 2008
Fleebi o Mercur
Closest approach October 6, 2008
Fleebi o Mercur
Closest approach September 29, 2009
Mercur orbiter
Orbital insertion Mairch 18, 2011, 01:00 UTC[6]

MESSENGER mission emblem.png


Discovery program
← CONTOUR Deep Impact

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. Mairch 18, 2013. Retrieved Julie 8, 2013. 
  3. Wu, Brian (Aprile 3, 2015). "NASA Set to Extend Mercury Mission for Another Month". Johns Hopkins University APL. The Science Times. Retrieved Aprile 4, 2015. 
  4. "MESSENGER's Operations at Mercury Extended". Johns Hopkins University APL. SpaceRef.com. Aprile 3, 2015. Retrieved Aprile 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. 
  6. Lee, Jimmy; Galuska, Mike (Mairch 18, 2011). "NASA Chats - MESSENGER Prepares to Orbit Mercury". NASA. Archived frae the original on Juin 7, 2011. Retrieved Mairch 18, 2011. 
  7. "NASA Spacecraft Circling Mercury". New York Times. Mairch 17, 2011. Retrieved Julie 9, 2013. 
  8. Wendel, J. (Aprile 2015). "Mercury's secrets revealed by soon-to-crash spacecraft". Eos. 96. doi:10.1029/2015EO029165.