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Probe sends first glimpse of distant icy world

Ultima Thule views
The left image shows a raw, pixel-by-pixel view of an icy object known as Ultima Thule, as captured by NASA’s New Horizons probe at 11:56 a.m. ET Dec. 30 from a distance of 1.2 million miles. (JHUAPL / SwRI / NASA via YouTube)

LAUREL, Md. — The science team for NASA’s New Horizon spacecraft released its first multi-pixel view of an icy world more than 4 billion miles from Earth, and the analysis suggests it’s an elongated space cigar.

“We know it’s not round, we can say that with confidence,” John Spencer of the Southwest Research Institute, one of the mission’s project scientists, said today during a news briefing scheduled just hours before the probe was due to fly just 2,200 miles past the mysterious object.

Based on observations made on Earth during stellar occultations, Spencer and other astronomers suspected that the object — known by its formal designation, 2014 MU69, or by its nickname, Ultima Thule — might be made of smooshed-together chunks of ice and rock.

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Ring in the New Year with history’s farthest flyby

Alan Stern
New Horizons principal investigator Alan Stern, a planetary scientist at the Southwest Research Institute, stands alongside a scale model of the New Horizons spacecraft after a briefing on the Ultima Thule flyby. (GeekWire Photo / Alan Boyle)

LAUREL, Md. — The sleeping bags are rolled out and the videos are cued up for a New Year’s celebration of cosmic proportions here at Johns Hopkins University’s Applied Physics Laboratory, but the star of the show is still a mystery.

That’ll change once NASA’s New Horizons spacecraft flies past an icy object more than 4 billion miles from Earth, known as 2014 MU69 or Ultima Thule.

The piano-sized probe is due to make its closest approach at 12:33 a.m. ET on New Year’s Day (9:33 p.m. PT Dec. 31), nearly 13 years after New Horizons’ launch and three and a half years after it flew past Pluto.

Mission managers say it’s all systems go for history’s farthest-out close encounter with a celestial body.

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New Horizons probe zeroes in on Ultima Thule

Ultima Thule and New Horizons
An artist’s conception shows Ultima Thule with the New Horizons probe silhouetted by the sun. (NASA / JHUAPL / SwRI Illustration)

Act Two of the 12-year-old New Horizons mission to Pluto and the solar system’s icy Kuiper Belt is heating up, with less than a month to go before NASA’s piano-sized spacecraft makes history’s farthest-out close encounter with a celestial object.

The New Year’s flyby of a mysterious Kuiper Belt object (or objects) known as Ultima Thule (UL-ti-ma THOO-lee) follows up on the mission’s first act, which hit a climax three years ago with a history-making flyby of Pluto.

Launched in 2006, New Horizons was never meant to be a one-shot deal. Even before the Pluto flyby, mission managers used the Hubble Space Telescope to identify its next quarry, a billion miles farther out in the Kuiper Belt. Now it’s crunch time for New Horizons principal investigator Alan Stern and his team.

Again.

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New Horizons and OSIRIS-REx spot their targets

Ultima Thule
The picture on the left was created by adding 48 different exposures from the LORRI camera on NASA’s New Horizons probe. The picture on the right has been processed to subtract the light from background stars, leaving an icy object known as Ultima Thule shining dimly in the crosshairs. (NASA / JHUAPL / SwRI Photo)

The next few months are due to bring two amazing interplanetary encounters: a rendezvous with an asteroid and a flyby past a mysterious icy object beyond Pluto on the solar system’s edge. Over the past few days, we’ve gotten our first fleeting peeks at both targets, and the view will only get better from now on.

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Pluto probe’s next target nicknamed Ultima Thule

Ultima Thule and New Horizons
An artist’s conception shows Ultima Thule with the New Horizons probe silhouetted by the sun. (NASA / JHUAPL / SwRI Illustration)

Nearly three years after flying past Pluto, NASA’s New Horizons spacecraft is heading for a target more than 4 billion miles from Earth. It’s officially known as 2014 MU69, but now the New Horizons team has decided to call it Ultima Thule (“UL-ti-ma THOO-lee”), or Ultima for short.

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