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Proposal Identification No.: R2420 Date Received: 2008­Jun­02 14:02:17
Technical Page
Proposal Type: Regular
General Category: Planetary Radar
Observation Category: Solar System
Total Time Requested: 10 Hours
Minimum Useful Time: 6
Proposal Title: Radar­VLBI Observations of Near­Earth Asteroids 4179 Toutatis and 2008 EV5
ABSTRACT:
Radar observations of near­Earth objects provide uniquely valuable information about their shapes, spin states,
and trajectories. Conventional radar observations use a single receive station, and resolve the target in Doppler
velocity and in time delay. By observing radar targets with very­long baseline interferometry, we can
unambiguously determine shapes and spin states with relatively few observations and look for variations in the
radar scattering properties of the surface. We propose radar­VLBI observations of the near­Earth asteroids 4179
Toutatis and 2008 EV5 during November and December 2008, using Arecibo as the transmitter and the VLBA and
Green Bank Telescope as receive stations.
Name Institution E­mail Phone Student
Michael W Busch California Institute
of Technology
busch@caltech.edu 1­612­269­9998 G
Remote Observing Request
X Observer will travel to AO
Remote Observing
In Absentia (instructions to oper­
ator)
Instrument Setup
S­Band radar S­band receiver
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
2330 ­ 2430
2