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Nearly ten years after its launch, the New Horizons spacecraft will reach its closest encounter with Pluto on July 14, 2015. NASA and the world science community will celebrate the landmark at the Applied Physics Laboratory (APL) at Johns Hopkins University, as well as at “PlutoPalooza” events around the world.
Three months ago, I posted an article explaining what to expect during the flyby. This is a revised version of the same post, with some errors corrected, the expected sizes of Nix and Hydra updated, and times of press briefings added.
Last week, the pile of New Horizons LORRI camera raw image releases included nine frames from a high-resolution mosaic on Charon. Together with the color MVIC view, they make a 3D global photo of Pluto's moon. Other recently released goodies include a global backlit color image of Pluto and the first image that resolves the tiny moon Styx.
Now that New Horizons is regularly sending back data, the mission is settling into a routine of releasing a set of captioned images on Thursdays, followed by raw LORRI images on Friday. The Thursday releases give us the opportunity to see lovely color data from the spacecraft's Ralph MVIC instrument. This week, the newly available color data set covered Charon.
New Horizons—what will be NASA’s greatest success of 2015—was cancelled multiple times in its early life, and many times before that in its previous incarnations. A mission to Pluto was not inevitable, despite the overwhelming scientific and public excitement.
Casey is the public face of The Planetary Society's efforts to advance planetary exploration, planetary defense, and the search for life. He is a trusted expert in space policy and works to demystify the political and policy processes behind space exploration.
As New Horizons approached 2014 MU69 between 31 December 2018 at 20:00 UT and 1 January 2019 at 05:01 (UT), it captured a set of images to observe the little world's rotation. This movie includes 15 such images (as many as had been downlinked by 15 January) and covers about half a rotation as New Horizons closed from a distance of 500,000 to only 28,000 kilometers. Over that range, the image scale decreased from 2.5 kilometers per pixel to 140 meters per pixel.
Four images taken on 31 December 2018 document the rotation and increasing apparent size of 2014 MU69 (informally nicknamed "Ultima Thule") to New Horizons. The top row shows the images as returned from the spacecraft. In the bottom row, the images have been "deconvolved," processed to correct for the known properties of the camera optics to reveal more detail. In all the images, the little world's binary shape, bright neck region, and mottled surface are clearly visible.
The New Horizons team is sharing its data from the MU69 encounter relatively quickly after acquisition on the APL website. This is a montage of representative raw images, and is up-to-date as of 3 January 2019. Over time, as New Horizons returns more data, the sequence will be filled in.