Author/Authors :
Dunham، نويسنده , , David W. and Farquhar، نويسنده , , Robert W. and McAdams، نويسنده , , James V. and Holdridge، نويسنده , , Mark and Nelson، نويسنده , , Robert and Whittenburg، نويسنده , , Karl and Antreasian، نويسنده , , Peter and Chesley، نويسنده , , Steven and Helfrich، نويسنده , , Clifford and Owen، نويسنده , , William M. and Williams، نويسنده , , Bobby and Veverka، نويسنده , , Joseph and Harch، نويسنده , , Ann، نويسنده ,
Abstract :
Spacecraft have successfully landed on the Moon, Venus, and Mars, and have penetrated the atmosphere of Jupiter. On 2001 February 12, the Near-Earth Asteroid Rendezvous (NEAR) Shoemaker spacecraft landed on the surface of the asteroid (433) Eros after a year of observations in orbit about the asteroid. NEAR Shoemaker was not designed to land on an asteroid, complicating the design of operations needed to accomplish this feat. However, the NEAR Shoemaker team wanted to attempt a landing after the year of orbital operations that consumed most of the remaining spacecraft fuel, operations funding, and planned Deep Space Network tracking. This would be a fitting end to the mission, and it would be possible to obtain images at much greater resolution during the descent than could be obtained from orbit. The operations were more successful than the NEAR Shoemaker team had hoped, obtaining 70 high-resolution images during the descent and two weeks of gamma-ray spectrometer data from the surface after the successful soft landing.
