Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/TaylortagR2081tp.pdf Дата изменения: Sat Jun 18 09:06:42 2005 Дата индексирования: Sat Dec 22 22:46:48 2007 Кодировка: Поисковые слова: asteroid

Proposal Identification No.:

R2081

Date Received:

2005-Feb-01 19:48:10

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Prop osal Title: Regular Planetary Radar Solar System 11 Hours

Dynamical and Physical Characterization of Sun-Earth Horseshoe Orbit Asteroid

54509 (2000 PH5)
ABSTRACT:
We request 11 hours of Arecib o Planetary Radar time to study asteroid 54509 (2000 PH5), the only ob ject on a Sun-Earth horsesho e orbit suitable for detailed physical characterization using radar. These observations of the o ddly-shap ed 120 to 180-m diameter ob ject will build up on those made in July 2001 using the Goldstone radar and July 2004 using the Arecib o radar. The target will b e at a different asp ect angle in July 2005 than it was in July 2004 meaning bandwidth measurements will further constrain the lo cation of the target's spin p ole. Having an accurate spin vector orientation will aid in the mo deling of 2000 PH5's shap e and examining 2000 PH5's Yarkovsky evolution. Precise ranging measurements will b e used to measure the Yarkovsky drift of 2000 PH5's orbit and provide constraints on its mass and thermal prop erties.

Name Patrick A Taylor

Institution Cornell University

E-mail ptaylor@astro.cornell.edu

Phone 607-255-6307

Student G

Service Observing Request

Remot e Observing Request

X

None All of the observing run. Part of the observing run. Queue Observing

X

No Maybe Yes

Instrument Setup
S-Band radar S-band receiver

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned

2