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New Horizons Returns Its Sharpest Views Of Ultima Thule

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Probably the most detailed photos of Ultima Thule — obtained simply minutes earlier than the spacecraft’s closest strategy at 12:33 a.m. EST on Jan. 1 — have a decision of about 110 toes (33 meters) per pixel. Their mixture of upper spatial decision and a good viewing geometry provide an unprecedented alternative to research the floor of Ultima Thule, believed to be essentially the most primitive object ever encountered by a spacecraft. This processed, composite image combines 9 particular person photos taken with the Lengthy Vary Reconnaissance Imager (LORRI), every with an publicity time of zero.025 seconds, simply 6 ½ minutes earlier than the spacecraft’s closest strategy to Ultima Thule (formally named 2014 MU69). The picture was taken at 5:26 UT (12:26 a.m. EST) on Jan. 1, 2019, when the spacecraft was four,109 miles (6,628 kilometers) from Ultima Thule and four.1 billion miles (6.6 billion kilometers) from Earth. The angle between the spacecraft, Ultima Thule and the Solar – referred to as the “section angle” – was 33 levels. Picture Credit score: NASA/Johns Hopkins Utilized Physics Laboratory/Southwest Analysis Institute, Nationwide Optical Astronomy Observatory

February 26, 2019 – The mission crew referred to as it a “stretch aim” – simply earlier than closest strategy, exactly pointing the cameras on NASA’s New Horizons spacecraft to snap the sharpest potential footage of the Kuiper Belt object nicknamed Ultima Thule, its New Yr’s flyby goal and the farthest object ever explored.

Now that New Horizons has despatched these saved flyby photos again to Earth, the crew can enthusiastically affirm that its formidable aim was met.

These new photos of Ultima Thule – obtained by the telephoto Lengthy-Vary Reconnaissance Imager (LORRI) simply six-and-a-half minutes earlier than New Horizons’ closest strategy to the article (formally named 2014 MU69) at 12:33 a.m. EST on January 1, 2019 – provide a decision of about 110 toes (33 meters) per pixel. Their mixture of excessive spatial decision and a good viewing angle offers the crew an unprecedented alternative to research the floor, in addition to the origin and evolution, of Ultima Thule, which is considered essentially the most primitive object ever encountered by a spacecraft.

“Bullseye!” mentioned New Horizons Principal Investigator Alan Stern, of the Southwest Analysis Institute (SwRI). “Getting these photos required us to know exactly the place each tiny Ultima and New Horizons have been — second by second – as they handed each other at over 32,000 miles per hour within the dim mild of the Kuiper Belt, a billion miles past Pluto. This was a a lot harder statement than something we had tried in our 2015 Pluto flyby.

“These ‘stretch aim’ observations have been dangerous, as a result of there was an actual probability we’d solely get half and even none of Ultima within the digital camera’s slim area of view,” Stern continued. “However the science, operations and navigation groups nailed it, and the result’s a area day for our science crew! Among the particulars we now see on Ultima Thule’s floor are in contrast to any object ever explored earlier than.”

The upper decision brings out a many floor options that weren’t readily obvious in earlier photos. Amongst them are a number of shiny, enigmatic, roughly round patches of terrain. As well as, many small, darkish pits close to the terminator (the boundary between the sunlit and darkish sides of the physique) are higher resolved. “Whether or not these options are craters produced by impactors, sublimation pits, collapse pits, or one thing completely totally different, is being debated in our science crew,” mentioned John Spencer, deputy undertaking scientist from SwRI.

Mission Scientist Hal Weaver, of the Johns Hopkins Utilized Physics Laboratory, famous that the newest photos have the very best spatial decision of any New Horizons has taken – or might ever take – throughout its total mission. Swooping inside simply 2,200 miles (three,500 kilometers), New Horizons flew roughly thrice nearer to Ultima than it zipped previous its main mission goal, Pluto, in July 2015.

Ultima is a smaller object than Pluto, however the Ultima flyby was performed with the very best navigation precision ever achieved by any spacecraft earlier than. This unprecedented precision was achieved because of the ground-based occultation campaigns from 2017 and 2018 performed in Argentina, Senegal, South Africa and Colombia, in addition to the European Area Company’s Gaia mission, which offered the areas of the celebrities that have been used in the course of the occultation campaigns.

Search for these and different LORRI photos on the New Horizons LORRI web site this week. Uncooked photos from the digital camera are posted to the positioning every Friday.

Mission operations supervisor Alice Bowman, of APL, studies that the spacecraft continues to function flawlessly. New Horizons is sort of four.13 billion miles (6.64 billion kilometers) from Earth; at that distance, radio indicators, touring at mild velocity, attain the massive antennas of NASA’s Deep Area Community six hours and 9 minutes after New Horizons sends them.

This processed, composite image combines seven particular person photos taken with the New Horizons Lengthy Vary Reconnaissance Imager (LORRI), every with an publicity time of zero.025 seconds, simply 19 minutes earlier than the spacecraft’s closest strategy to Ultima Thule (formally named 2014 MU69). The picture was taken at 5:14 UT (12:14 a.m. EST) on Jan. 1, 2019, when the spacecraft was 10,350 miles (16,694 kilometers) from Ultima Thule and four.1 billion miles (6.6 billion kilometers) from Earth. The angle between the spacecraft, Ultima Thule and the Solar – referred to as the “section angle” – was 16 levels. Picture Credit score: NASA/Johns Hopkins Utilized Physics Laboratory/Southwest Analysis Institute, Nationwide Optical Astronomy Observatory


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