New Horizons returns greatest view but of Ultima Thule – Astronomy Now
Simply six-and-a-half minutes earlier than the New Horizons spacecraft made its closest strategy to Ultima Thule, a primitive Kuiper Belt physique a billion miles previous Pluto, the probe’s Lengthy-Vary Reconnaissance Imager digicam captured this beautiful view of the unusually easy, bi-lobed object
Engineers thought-about the pictures a “stretch goal” for the New Yr’s Day flyby due to the spacecraft’s excessive velocity and the dim surroundings of the outer photo voltaic system. At closest strategy, New Horizons was simply 3,500 kilometres (2,200 miles) from Ultima Thule, thrice nearer to its goal than when the spacecraft raced previous Pluto in July 2015.
“Getting these images required us to know precisely where both tiny Ultima and New Horizons were — moment by moment – as they passed one another at over 32,000 miles per hour in the dim light of the Kuiper Belt, a billion miles beyond Pluto,” mentioned Alan Stern, the New Horizons principal investigator. “This was a a lot harder commentary than something we had tried in our 2015 Pluto flyby.
“These stretch goal observations were risky, because there was a real chance we’d only get part or even none of Ultima in the camera’s narrow field of view. But the science, operations and navigation teams nailed it, and the result is a field day for our science team! Some of the details we now see on Ultima Thule’s surface are unlike any object ever explored before.”
With a decision of 33 metres (110 ft) per pixel, the brand new picture reveals many particulars that weren’t obvious in earlier images, together with a number of vibrant, roughly round patches and quite a few small, darkish pits close to the terminator.
“Whether these features are craters produced by impactors, sublimation pits, collapse pits, or something entirely different, is being debated in our science team,” mentioned deputy challenge scientist John Spencer.