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OUTER PLANETS
New Horizons' catches a wandering Kuiper Belt Object not far off
by Staff Writers
Laurel MD (SPX) Dec 07, 2015


New Horizons image of 1994 JR1, taken Nov. 2, is the closest-ever picture of a Kuiper Belt object. (Credit: NASA/JHUAPL/SwRI)

NASA's New Horizons spacecraft recently took the closest images ever of a distant Kuiper Belt object - demonstrating its ability to observe numerous such bodies over the next several years if NASA approves an extended mission into the Kuiper Belt.

In a short animation, consisting of four frames taken by the spacecraft's Long Range Reconnaissance Imager (LORRI) on Nov. 2, 2015, and spaced an hour apart, one can see this 90-mile (150-kilometer)-wide ancient body, officially called 1994 JR1, moving against a background of stars.

When these images were made, 1994 JR1 was 3.3 billion miles (5.3 billion miles) from the sun, but only 170 million miles (280 million kilometers) away from New Horizons - setting a record, by a factor of at least 15, for the closest-ever picture of a small body in the Kuiper Belt, the solar system's "third zone" beyond the inner, rocky planets and outer, icy gas giants.

Mission scientists plan to use images like these to study many more ancient Kuiper Belt objects from New Horizons if an extended mission is approved.

earlier report
NASA's New Horizons Completes Record-Setting Kuiper Belt Targeting Maneuvers
November 5 - NASA's New Horizons spacecraft has successfully performed the last in a series of four targeting maneuvers that set it on course for a January 2019 encounter with 2014 MU69. This ancient body in the Kuiper Belt is more than a billion miles beyond Pluto; New Horizons will explore it if NASA approves an extended mission.

The four propulsive maneuvers were the most distant trajectory corrections ever performed by any spacecraft. The fourth maneuver, programmed into the spacecraft's computers and executed with New Horizons' hydrazine-fueled thrusters, started at approximately 1:15 p.m. EST on Wednesday, Nov. 4, and lasted just under 20 minutes.

Spacecraft operators at the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland, began receiving data through NASA's Deep Space Network just before 7 p.m. EST on Wednesday indicating the final targeting maneuver went as planned.

The maneuvers didn't speed or slow the spacecraft as much as they "pushed" New Horizons sideways, giving it a 57 meter per second (128 mile per hour) nudge toward the KBO. That's enough to make New Horizons intercept MU69 in just over three years.

"This is another milestone in the life of an already successful mission that's returning exciting new data every day," said Curt Niebur, New Horizons program scientist at NASA Headquarters in Washington. "These course adjustments preserve the option of studying an even more distant object in the future, as New Horizons continues its remarkable journey."

The New Horizons team will submit a formal proposal to NASA for the extended mission to 2014 MU69 in early 2016. The science team hopes to explore even closer to MU69 than New Horizons came to Pluto on July 14, which was approximately 7,750 miles (12,500 kilometers).

"New Horizons is healthy and now on course to make the first exploration of a building block of small planets like Pluto, and we're excited to propose its exploration to NASA," said New Horizons Principal Investigator Alan Stern, of the Southwest Research Institute in Boulder, Colo.

The KBO targeting maneuvers were the mission's largest and longest, and carried out in a succession faster than any sequence of previous New Horizons engine burns. They were also incredibly accurate, performing almost exactly as they were designed and setting New Horizons on the course mission designers predicted. "The performance of each maneuver was spot on," said APL's Gabe Rogers, New Horizons spacecraft systems engineer and guidance and control lead.

The first three maneuvers were carried out on Oct. 22, 25 and 28. At the time of yesterday's maneuver, New Horizons, speeding toward deeper space at more than 32,000 miles per hour, was approximately 84 million miles (135 million kilometers) beyond Pluto and nearly 3.2 billion miles (about 5.1 billion kilometers) from Earth.

The spacecraft is currently 895 million miles (1.44 billion kilometers) from MU69. All systems remain healthy and the spacecraft continues to transmit data stored on its digital recorders from its flight through the Pluto system in July.

New Horizons flew through the Pluto system on July 14, 2015, making the first close-up observations of Pluto and its family of five moons.


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Previous Report
OUTER PLANETS
Pluto surface details revealed in best images yet
Laurel MD (SPX) Dec 05, 2015
NASA's New Horizons spacecraft has sent back the first few of a series of the sharpest views of Pluto it obtained during its July flyby - and this image sequence forms the best close-ups of Pluto that humans may see for decades. Every week the piano-sized New Horizons spacecraft transmits data stored on its digital recorders from its flight through the Pluto system on July 14. These ... read more


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