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NASA spacecraft sees world beyond Pluto as it readies for historic flyby – CNET

by The Editor
December 27, 2018
in Science
0
NASA spacecraft sees world beyond Pluto as it readies for historic flyby     – CNET

An artist's impression of NASA's New Horizons spacecraft encountering Ultima Thule (2014 MU69), a Kuiper Belt object that orbits one billion miles beyond Pluto, on Jan. 1, 2019.

NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Steve Gribben

NASA's New Horizons spacecraft is set to explore farther worlds than ever before when it flies past 2014 MU69 in the early hours of New Year's Day.

The spacecraft has gradually made its approach over the last two weeks as NASA scientists performed a series of checks and trajectory corrections to ensure that New Horizons is on the right track to gather as much information about the mysterious object — nicknamed Ultima Thule — without crashing into any debris that may be lurking in the outer reaches of our solar system.

On Dec. 15, the 12 researchers who make up New Horizons hazard watch team confirmed that the approach path was safe using New Horizons' telescopic Long Range Reconnaissance Imager (LORRI). If they had discovered moons or rings near Ultima, NASA would have opted for a secondary flight path, with New Horizons course-correcting and flying past the object from a much greater distance.

"The team was in complete consensus that the spacecraft should remain on the closer trajectory, and mission leadership adopted our recommendation," said Mark Showalter, hazards team lead.

As New Horizons approaches, Ultima Thule becomes brighter and brighter. Soon, the spacecraft will fly past the mysterious object at a distance of 2,200 miles from its surface.

NASA/Johns Hopkins Applied Physics Laboratory/Southwest Research Laboratory/Henry Throop

As it stands, New Horizons will flyby Ultima Thule from a distance of 3,500 kilometers (~2,200 miles) — its optimal path. To put that in perspective, remember those epic photos of Pluto? New Horizons cameras snapped those as it flew 12,500 kilometers (~7,800 miles) from the surface of the far-off dwarf planet. Thus, New Horizons will come three times closer to Ultima Thule than it did Pluto and provide NASA researchers with valuable images and science data of a world we know practically nothing about.

On Dec. 26, New Horizons enters Encounter Mode, a type of "safe mode" that ensures the science objectives of the mission will be carried out even if the spacecraft malfunctions. Under normal circumstances, a malfunction sees New Horizons phone home asking for help, but because this now takes 12 hours to perform, its risky to do so when the spacecraft is on its close approach.

Practically, entering Encounter Mode means that the spacecraft is on its own now. With thousands of instructions loaded into its onboard computers, it has begun its delicate dance, 1 billion miles past Pluto.

Two days before we left New Horizons to its own devices, it snapped the highest resolution image of the distant "worldlet" yet: The dark, pixelated blur below shows Ultima Thule at its center, 10 million kilometers (~6.3 million miles) away.

ut-first-1x1-detectionut-first-1x1-detection

New Horizons spots Ultima Thule (circled) in the high resolution image taken by LORRI on Dec. 24.

NASA/Johns Hopkins Applied Physics Laboratory/Southwest Research Institute

Within a week, that tiny pixel of light in the distance will become a known world. We'll see what it looks like, what its made of, how cold it is, its mass and whether or not it has any moons of its own.

New Horizons will be literally ringing in the New Year by flying past the most distant world we've ever explored, with the closest approach set to occur at 12:33 a.m. ET on Jan. 1. Although the US is currently in the midst of federal government shutdown, you will still be able to catch the reactions and live simulations of the flyby on the New Horizons mission website. Data and images from the flyby are expected later on New Years Day, sometime after 11:30 a.m. ET.

After a year of great space news, New Horizons will hopefully put 2019 on the right flyby track, too, so I suggest you whack on the Interstellar soundtrack on New Years Eve, settle in and marvel at the new world we're about to uncover.

CNET's Holiday Gift Guide: The place to find the best tech gifts for 2018.

NASA turns 60: The space agency has taken humanity farther than anyone else, and it has plans to go further.

cnet

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An artist's impression of NASA's New Horizons spacecraft encountering Ultima Thule (2014 MU69), a Kuiper Belt object that orbits one billion miles beyond Pluto, on Jan. 1, 2019.

NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Steve Gribben

NASA's New Horizons spacecraft is set to explore farther worlds than ever before when it flies past 2014 MU69 in the early hours of New Year's Day.

The spacecraft has gradually made its approach over the last two weeks as NASA scientists performed a series of checks and trajectory corrections to ensure that New Horizons is on the right track to gather as much information about the mysterious object — nicknamed Ultima Thule — without crashing into any debris that may be lurking in the outer reaches of our solar system.

On Dec. 15, the 12 researchers who make up New Horizons hazard watch team confirmed that the approach path was safe using New Horizons' telescopic Long Range Reconnaissance Imager (LORRI). If they had discovered moons or rings near Ultima, NASA would have opted for a secondary flight path, with New Horizons course-correcting and flying past the object from a much greater distance.

"The team was in complete consensus that the spacecraft should remain on the closer trajectory, and mission leadership adopted our recommendation," said Mark Showalter, hazards team lead.

As New Horizons approaches, Ultima Thule becomes brighter and brighter. Soon, the spacecraft will fly past the mysterious object at a distance of 2,200 miles from its surface.

NASA/Johns Hopkins Applied Physics Laboratory/Southwest Research Laboratory/Henry Throop

As it stands, New Horizons will flyby Ultima Thule from a distance of 3,500 kilometers (~2,200 miles) — its optimal path. To put that in perspective, remember those epic photos of Pluto? New Horizons cameras snapped those as it flew 12,500 kilometers (~7,800 miles) from the surface of the far-off dwarf planet. Thus, New Horizons will come three times closer to Ultima Thule than it did Pluto and provide NASA researchers with valuable images and science data of a world we know practically nothing about.

On Dec. 26, New Horizons enters Encounter Mode, a type of "safe mode" that ensures the science objectives of the mission will be carried out even if the spacecraft malfunctions. Under normal circumstances, a malfunction sees New Horizons phone home asking for help, but because this now takes 12 hours to perform, its risky to do so when the spacecraft is on its close approach.

Practically, entering Encounter Mode means that the spacecraft is on its own now. With thousands of instructions loaded into its onboard computers, it has begun its delicate dance, 1 billion miles past Pluto.

Two days before we left New Horizons to its own devices, it snapped the highest resolution image of the distant "worldlet" yet: The dark, pixelated blur below shows Ultima Thule at its center, 10 million kilometers (~6.3 million miles) away.

ut-first-1x1-detectionut-first-1x1-detection

New Horizons spots Ultima Thule (circled) in the high resolution image taken by LORRI on Dec. 24.

NASA/Johns Hopkins Applied Physics Laboratory/Southwest Research Institute

Within a week, that tiny pixel of light in the distance will become a known world. We'll see what it looks like, what its made of, how cold it is, its mass and whether or not it has any moons of its own.

New Horizons will be literally ringing in the New Year by flying past the most distant world we've ever explored, with the closest approach set to occur at 12:33 a.m. ET on Jan. 1. Although the US is currently in the midst of federal government shutdown, you will still be able to catch the reactions and live simulations of the flyby on the New Horizons mission website. Data and images from the flyby are expected later on New Years Day, sometime after 11:30 a.m. ET.

After a year of great space news, New Horizons will hopefully put 2019 on the right flyby track, too, so I suggest you whack on the Interstellar soundtrack on New Years Eve, settle in and marvel at the new world we're about to uncover.

CNET's Holiday Gift Guide: The place to find the best tech gifts for 2018.

NASA turns 60: The space agency has taken humanity farther than anyone else, and it has plans to go further.

cnet

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