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Proposal Identification No.: R2002 Date Received: 2004­Sep­28 18:09:48
Technical Page
Proposal Type: Urgent
General Category: Planetary Radar
Sub­Category: Radar
Observation Category: Solar System
Total Time Requested: 6 Hours
Proposal Title: Radar Observations of Comet C/2004 S1 (VAN NESS)
ABSTRACT:
A recently discovered (2004 September 26) comet C/2004 S1 (VAN NESS) will be observable at Arecibo 2004
October 10­20. While the ephemeris is still uncertain, we expect it to be visible during the beginning of, and
somewhat before, the R1982, R1980, and R1885 observations in that window. We request time in the currently
empty slots before those observations. Opportunities for radar observation of comets are quite rare, of order once a
year. Radar provides measures of the nucleus and the size distribution of the grain coma that are very di#cult to
obtain any other way.
Name Institution E­mail Phone Student
Michael C Nolan Arecibo Observatory nolan@naic.edu 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
Frequency Ranges Planned
1