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Proposal Identification No.:

R2868 Arecibo Observatory

Date Received: 2013-Sep-02 14:24:48 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 1 2013. This proposal has not been submitted before. Proposal Type: General Category: Observation Category: Time Requested this semester: Hours Next Semester: Hours already used for this pro ject: Additional Hours required to complete pro ject: Minimum Useful Time: Expected Data Storage: Prop osal Title: Regular Planetary Radar Solar System 114.5 94.0 0 2 less than 100 GB

Arecibo Radar Observations of 13 High-Priority Near-Earth Asteroids During

CY2014
ABSTRACT: We request 60 sessions over calendar year 2014 totaling 208.5 hours of telescope time (observing + transmitter setup time) to observe our 13 highest-priority near-Earth asteroids. Nine ob jects provide an important discovery space as they are currently poorly characterized. Four ob jects have been observed with radar before: two are binaries whose properties we will refine and two are sub jects of long-term monitoring for perturbations due to sunlight, solar oblateness, and general relativity. Our goals include detailed physical characterization, determination of binarity or multiplicity, orbital refinement, and shape modeling when possible. Outreach Abstract: We will use the Arecibo radar to learn about the sizes, shapes, spins, and surfaces of near-Earth asteroids. In addition, we will study their orbits to ensure that they are not a threat to Earth.

Name Patrick A Taylor Michael C Nolan

Institution Arecibo Observatory Arecibo Observatory

E-mail ptaylor@naic.edu nolan@naic.edu

Phone 787-878-2612 x358 787-878-2612 x334

Student no no

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Additional Authors
Alessondra Springmann (sondy@naic.edu) Ellen Howell (ehowell@naic.edu) Jon Giorgini (jdg@tycho.jpl.nasa.gov) Lance Benner (lance@reason.jpl.nasa.gov) Marina Brozovic (marina.brozovic@jpl.nasa.gov) Jean-Luc Margot (jlm@ess.ucla.edu) Shantanu Naidu (spn@ucla.edu) Graduate Student Sean Marshall (seanm@astro.cornell.edu) Graduate Student Michael Busch (michael.william.busch@gmail.com) Mike Shepard (mshepard@bloomu.edu) Chris Magri (magri@maine.edu)

This work is part of a PhD thesis.

Remote Observing Request

X

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

Section I I - Time Request
The following times are in UT. For these observations night-time is not needed.

Begin ­ End Interval­Interval ­ ­ ­ ­

Days Needed at This Interval

Time Constraints (Must Be Justified in the Prop osal Text) Please see proposal text for source lists and ephemerides.

Next Semester Time Request

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Begin ­ End Interval­Interval ­ ­ ­ ­

Days Needed at This Interval

Time Constraints (Must Be Justified in the Prop osal Text) Please see proposal text for source lists and ephemerides.

Section I I I - Instruments Needed
S-Band radar S-band receiver

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

Section IV - RFI Considerations Frequency Ranges Planned

Section V - Observing List Target List
Please see proposal text for source lists and ephemerides.

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