Nasa probe set to wake up for Pluto encounter

WASHINGTON (TIP): Nasa’s Pluto-bound probe New Horizons spacecraft comes out of hibernation for the last time next month in preparation for a six-month encounter, including a first-ever close flyby of the mysterious dwarf planet on July 14, 2015. Next month’s wake-up call was preprogrammed into New Horizons’ on-board computer in August, commanding it come out of hibernation Dec 6. Work on the Earth is well under way to prepare the spacecraft for a six-month encounter with Pluto that begins January next year, Nasa said in statement.

“New Horizons is healthy and cruising quietly through deep space – nearly three billion miles from home – but its rest is nearly over,” says Alice Bowman, New Horizons mission operations manager at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. “It is time for New Horizons to wake up, get to work, and start making history,” Bowman added. Since its launch in January 2006, New Horizons has spent 1,873 days in hibernation – about two-thirds of its flight time “spread over 18 separate hibernation periods from mid-2007 to late 2014 that ranged from 36 days to 202 days long”. In hibernation mode much of the spacecraft is unpowered; the onboard flight computer monitors system health and broadcasts a weekly beacon-status tone back to Earth. “The final hibernation wake up Dec 6 signifies the end of an historic cruise across the entirety of our planetary system,” added New Horizons principal investigator Alan Stern from Southwest Research Institute.

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