Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/BennertagR2314tp.pdf Дата изменения: Fri Feb 9 22:20:43 2007 Дата индексирования: Sat Dec 22 22:55:10 2007 Кодировка: Поисковые слова: информация

Proposal Identification No.:

R2314

Date Received:

2007-Feb-06 18:24:21

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT:
We propose delay-Doppler radar imaging, physical modeling, satellite searches, and orbital refinement of near-Earth asteroids (NEAs) 3200 Phaethon, 4954 Eric, 11500 1989 UR, and 2005 WJ56 during October 2007-January 2008. Phaethon and Eric are among the largest ob jects in the NEA population. Phaethon is the parent body of the Geminids meteors but unlike other meteor parent bodies, it is classified as an asteroid and not as a comet. Searches for cometary activity have been negative, so its origin remains enigmatic. The proposed observations will resolve a controversy concerning its diameter and optical albedo. 1989 UR has a very slow rotation period suggestive of non-principal axis rotation, the origins of which are poorly understood. 2005 WJ56 will be an extremely strong target; radar imaging could places thousands of pixels on its surface and reveal considerable detail.

Regular Planetary Radar Radar Solar System 62:45 Hours 3 days per ob ject

Radar Imaging of Near-Earth Asteroids (3200) Phaethon, (4954) Eric, (11500) 1989 UR, and 2005 WJ56

Name Lance A. M. Benner

Institution Jet Propulsion Laboratory

E-mail lance.benner@jpl.nasa.gov

Phone 818-354-7412

Student no

Remote Observing Request

X

Observer will travel to AO Remote Observing In Absentia (instructions to operator)

Instrument Setup
S-Band radar Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none 1


RFI Considerations Frequency Ranges Planned

2