Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/HowelltagR1896tp.ps Дата изменения: Thu Jun 10 20:10:45 2004 Дата индексирования: Sat Dec 22 21:51:07 2007 Кодировка: Поисковые слова: чоеыойе рмбоефщ

Proposal Identification No.: R1896 Date Received: 2004­Oct­08 11:58:05
Technical Page
Proposal Type: Urgent
General Category: Planetary Radar
Observation Category: Solar System
Total Time Requested: 12 Hours
Proposal Title: Radar Imaging of Near­Earth Asteroid 2003 TH2
ABSTRACT:
We propose to obtain high­resolution (15m) imaging of near­Earth asteroid 2003 TH2 in October of 2003. Recent
experience has shown that there is an enormous variety in the shapes, radar reflectivities, and rotation states of
near­Earth asteroids. Good imaging opportunities for relatively small objects such as 2003 TH2 (90m diameter)
occur only a few times per year. Radar imaging can help determine the internal structure by giving us information
about the size, spin rate and even density in the case of binary systems. Recently a satellite was discovered around
2003 SS84, which is similar in size (100m). This is the smallest satellite system known to date, so we particularly
want to increase the number of 100m objects we observe to see what the occurence rate of binaries is at this scale.
We have the opportunity to also obtain spectroscopy of this asteroid which will enhance the science return from the
radar images by linking the composition to the shape and spin.
Name Institution E­mail Phone Student
Ellen S. Howell Arecibo Observatory ehowell@naic.edu 878­2612 x282 no
Service Observing Request Remot e Observing Request
X None X No
All of the observing run. Maybe
Part of the observing run. Yes
Queue Observing
Instrument Setup
S­Band radar S­band receiver
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
2380
2