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NEAR Begins Descent To Eros

NEAR Shoemaker is expected to touch down in an area just outside Himeros, the asteroid's distinctive saddle-shaped depression, after providing the highest-resolution images ever taken of Eros' boulder-strewn, cratered terrain. The final leg of the controlled descent begins with the spacecraft about 5 kilometers (3 miles) above the surface; it will then execute an unprecedented series of four engine burns designed to slow its descent from about 32 kph to about 9 kph.

Monday, February 12: Descent to Eros Events

  • 7:00 - 8:00 a.m. -- Live shots from the NEAR Mission Operations Center (MOC) - APL via satellite.
  • 11:00 a.m. -- Breaking news to report results of scheduled 10:31 a.m. engine firing, via satellite.
  • Noon -- NEAR Video File - APL, via satellite.
  • 1:30 - 3:30 p.m. -- Descent Activities from NEAR MOC. Broadcast live via satellite with simultaneous Web cast.
  • 4:00-8:00 p.m. -- Live shots from the NEAR MOC via satellite.
  • Space TV:   Mirror 1   -   Mirror 2

  •  Washington (AFP) Feb. 12, 2001
    The US spacecraft NEAR Shoemaker on Monday began an historic unmanned descent to touch down on the surface of asteroid 433 Eros, Johns Hopkins University scientists said.

    The spacecraft is due to touchdown at 15:04 local time (2004 GMT).

    NEAR Shoemaker fired its thrusters for 20 seconds to ease the spacecraft down toward an altitude of 25 kilometers (15.5 miles).

    "The de-orbit burn ... has worked quite well," said Robert Farquhar, NEAR mission director at the University's Applied Physics Laboratory (APL) in Laurel, Maryland, outside Washington.

    "We are within one percent of our targeted accuracy. We're quite happy about that," he said.

    With the first of five thrusters firing, the spacecraft was to slow to a speed of eight kilometers (five miles) per hour from 32 kilometers (20 miles) per hour.

    Touchdown procedures, expected to last four and a half hours, began at 10:31 local time (1531 GMT). The spacecraft had been orbiting Eros at 35 kilometers (22 miles) altitude.

    Asteroid 433 Eros, named after the Greek god of love, is 33 kilometers (21 miles) long and 13 kilometers (8 miles) in diameter, and lies 316 million kilometers (196 million miles) from earth.

    It takes just more than 17 minutes for a command from Earth to reach the NEAR spacecraft.


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