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Proposal Identification No.: R2737 Date Received: 2012­Mar­21 16:01:27
Technical Page
Proposal Type: Urgent
General Category: Planetary Radar
Observation Category: Solar System
Total Time Requested: 3 hours Hours
Minimum Useful Time: 1 hour
Proposal Title: Observations of two NEAs by extending scheduled radar time on March 23 and
24.
ABSTRACT:
We propose to extend existing scheduled planetary radar time to observe two NEAs: 2010 SV3 and 2012 BT23 on
March 23, 24, 2012. These objects will be bright enough for astrometry to improve the orbit determination, and
possibly get a rough shape determination. The positions of these objects are known well enough that pointing will
not be a problem. 2010 SV3 is expected to be 200­400m in diameter, and should be detectable at SNR 3­5 per run,
assuming rapid rotation. If it rotates more slowly, the SNR will be higher. 2012 BT23, discovered in early February,
is expected to be 400­1000 m in diameter, and should be detectable at SNR at least 8 per run. The availability of
these objects in a time already scheduled for planetary radar avoids the need for (separately) warming up the
transmitter, makes e#icent use of the radar transmitter with minimal impact on the existing schedule. If for some
reason we do not detect 2012 BT23, the scheduled project (A2645) can run as planned in the remaining time.
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
2380 MHz
2