Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/HowelltagR2191tp.pdf Дата изменения: Mon Mar 6 21:34:52 2006 Дата индексирования: Sat Dec 22 22:48:50 2007 Кодировка: Поисковые слова: asteroid

Proposal Identification No.:

R2191

Date Received:

2006-Dec-16 16:06:25

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Prop osal Title: ABSTRACT:
Asteroid 105 Artemis was found to have two hemispheres with different compositions: one side with hydrated silicates on the surface, one without. Our on-going observations (R1885) suggest that hydrated silicates are correlated with high radar albedo, which is a very valuable remote sensing tool. Companion observations of 105 Artemis to confirm the hydrated silicates with 3-micron spectroscopy at the NASA IRTF has been awarded time March 6-8 2006. We propose here for complementary radar observations to determine if the radar albedo is indeed higher on the hydrated side of this asteroid, which has a 16.8 hour rotation period. Another observing opportunity of this asteroid does not arise until 2010.

Urgent Planetary Radar Solar System 13 Hours

Rotationally resolved Radar Observations of 105 Artemis: Correlation with 3micron Spectroscopy

Name Ellen Howell

Institution Arecibo Observatory

E-mail ehowell@naic.edu

Phone 787 878-2612 x282

Student no

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