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Proposal Identification No.:

R2922

Date Received:

2014-Apr-28 15:02:57

Technical Page
This proposal has not been submitted before. Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Urgent Planetary Radar Solar System 56.5 Hours 1 hour

Arecibo Observations of Three Comets May-August 2014

Opportunities to observe comets are extremely rare, and these targets were either not known, or not known to be observable before the regular proposal deadline, so an Urgent proposal is being submitted. Recent observations of C/2012 K1 (PanSTARRS) have shown that it is brighter than expected, and will be observable at Arecibo using L-band spectroscopy. Comet Jacques was discovered 14 March 2014, and is also brighter than originally predicted. 209P/LINEAR is observable using radar May 23-27. The OH gas coma is not expected to be observable in this comet. Recent optical observations suggest that the nucleus may be as large as 2km, and the rotation period is about 8 hours, which give SNR>1500, and will result in excellent high-resolution images.

Name Ellen S Howell

Institution Arecibo Observatory

E-mail ehowell@naic.edu

Phone Student 17878782612282 no

Remote Observing Request

X

Observer will travel to AO Remote Observing In Absentia (instructions to operator)

Instrument Setup
S-Band radar L-wide S-band receiver

Atmospheric Observation Instruments:

Sp ecial Equipment or setup: The S-band radar is May 23-27 LST 21-24 (see proposal for specific times). The OH spectroscopy time distribution is given in the proposal, starting as soon as May 8, until August.

RFI Considerations
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Frequency Ranges Planned
2380 Mhz 1665-1667 MHz

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