Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/BennertagR2517tp.ps Дата изменения: Mon Jul 6 19:12:48 2009 Дата индексирования: Tue Aug 18 10:54:33 2009 Кодировка: Поисковые слова: asteroid

Proposal Identication No.: R2517 Date Received: 2009-Jul-02 20:55:18
Technical Page
Proposal Type: Urgent
General Category: Planetary Radar
Observation Category: Solar System
Total Time Requested: 17:00 Hours
Minimum Useful Time:
Proposal Title: Urgent Proposal for Arecibo Radar Imaging of Near-Earth Asteroid 2009 KC3
ABSTRACT:
We propose radar observations of potentially hazardous asteroid 2009 KC3, which will be a strong imaging target
during its approach within 19 lunar distances in August, 2009. This object has an absolute magnitude of 17.9,
suggesting a diameter within a factor of two of 800 meters. Nothing is known about its physical properties, but its
orbital parameters yield a Tisserand parameter of 2.73 that is within the range for Jupiter family comets and
outside the normal range for asteroids. Is 2009 KC3 an inactive comet nucleus?That is one of the questions we seek
to answer. We propose ve days of radar imaging to increase the probability of obtaining thorough rotation
coverage, which is critical for estimation of the 3D shape of this object.
Name Institution E-mail Phone Student
Lance A. M. Benner Jet Propulsion Labo-
ratory
lance.benner@jpl.nasa.gov 818-354-7412 no
Remote Observing Request
X Observer will travel to AO
Remote Observing
In Absentia (instructions to oper-
ator)
Instrument Setup
S-Band radar
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
2