Record Setting Course-Correction Puts New Horizons on Track to Kuiper Belt Flyby

With just 29 days to go before making space exploration history, NASA's New Horizons spacecraft performed a short but record-setting course-correction maneuver on Dec. 2 that refined its path toward Ultima Thule, the Kuiper Belt object it will fly by on Jan. 1.

Just as the exploration of Ultima Thule will be the farthest-ever flyby of a planetary body, Sunday's maneuver was the most distant trajectory correction ever made. At 8:55 a.m. EST, New Horizons fired its small thrusters for 105 seconds, adjusting its velocity by just over 1 meter per second, or about 2.2 miles per hour.

Data from the spacecraft confirming the successful maneuver reached the New Horizons Mission Operations Center at the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, through NASA's Deep Space Network, at 5:15 p.m. EST.

The maneuver was designed to keep New Horizons on track toward its ideal arrival time and closest distance to Ultima, just 2,200 miles (3,500 kilometers) at 12:33 a.m. EST on Jan. 1.

At the time of the burn New Horizons was 4.03 billon miles (6.48 billion kilometers) from Earth and just 40 million miles (64 million kilometers) from Ultima - less than half the distance between Earth and the Sun. From that far away, the radio signals carrying data from the spacecraft needed six hours, at light speed, to reach home.

The team is analyzing whether to conduct up to three other course-correction maneuvers to home in on Ultima Thule. Follow New Horizons to Ultima at http://pluto.jhuapl.edu/Mission/Where-is-New-Horizons.php.

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New Horizons
The million outer planets of a star called Sol

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