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Proposal Identification No.: R2421 Date Received: 2008­Jun­02 18:25:10
Technical Page
Proposal Type: Regular
General Category: Planetary Radar
Observation Category: Solar System
Total Time Requested: 98.5 Hours
Minimum Useful Time: 4 hours
Proposal Title: Radar Observations of Six Near­Earth Asteroids
ABSTRACT:
Between December 2008 and May 2009 six near­Earth asteroids (NEAs) can be observ ed using radar at Arecibo.
Detailed shape models are expected to result from five of these. Analysis of asteroid shape models has led to a
revolution in our understanding of surface processes, binary formation, spin and obliquity evolution of small
asteroids. Radar observations of the shape and spin characteristics tell us about the internal structure of these
objects, whether strong solid rocks, or strengthless rubble piles. The prevalence of binary asteroids has changed our
understanding of the dynamic processes a#ecting NEAs. The recent discovery of a triple system shows that new
types of objects are still being found. Only through groundbased observations can we hope to understand the
diverse population of NEAs. Radar observations continue to be one of the most powerful tools for probing the
diverse population of near­Earth asteroids.
Name Institution E­mail Phone Student
Ellen Howell Arecibo Observatory ehowell@naic.edu no
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
2