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Proposal Identication No.: R1815 Date Received: 2003-May-30 11:17:31
Technical Page
Proposal Type: Regular
General Category: Planetary Radar
Observation Category: Solar System
Total Time Requested: 54 Hours
Proposal Title: Radar Observations of Comet Encke in 2003
ABSTRACT:
We propose to make S-band radar observations of Comet 2P/Encke during the comet's November 2003 passage.
The approach distance of 0.26 AU is the closest for the next 40 years and aords the best opportunity we will ever
have to observe Encke with the Arecibo radar. The closer approach distance and improved system sensitivity of the
upgraded system should give 25-times stronger echoes than for the rst detection of Encke in 1980. Using a
combination of CW and delay-Doppler observations, we will attempt to determine the size, shape, rotation period,
and radar albedo of the nucleus. We will also search for a broadband echo component from large ejected grains, a
result which would be of considerable interest from the standpoint of meteoroid production and infrared-trail
modeling.
Name Institution E-mail Phone Student
John K Harmon Arecibo Observatory
(NAIC)
harmon@naic.edu 787-878-2612
x284
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
S-Band radar S-band receiver
Atmospheric Observation Instruments:
Special Equipment or setup: none
RFI Considerations
1

Frequency Ranges Planned
2