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Proposal Identification No.: R2380 Date Received: 2007­Dec­27 13:48:17
Technical Page
Proposal Type: Urgent
General Category: Planetary Radar
Observation Category: Solar System
Total Time Requested: 24 Hours
Minimum Useful Time: Transmit window plus one hour.
Proposal Title: Radar Imaging of the Very Closely Approaching Asteroid 2007 TU24
ABSTRACT:
We propose radar imaging of the newly discovered asteroid 2007 TU24 on Jan 27 and 28 and Feb. 1­4, 2008. This
object's 1.4­lunar­distance approach on Jan. 29 is the closest for any known Potentially Hazardous Asteroid until
2027. Apart from its absolute visual magnitude (H = 20.1, implying a diameter #0.3 km if it has a typical S­class
albedo), nothing is known about TU24's physical properties, but the expected echo signal­to­noise ratios (SNRs)
almost certainly will su#ce for 7.5­m­resolution imaging on our requested dates. Our objective is to obtain images
with as much orientational coverage as possible and then to use them to construct a detailed physical model. On
Jan 29, this object will be closer than any object observed at Arecibo to date. We will propose for bistatic
observations receiving either at GBT or Goldstone on Jan 27 and 28, but they are not required for a successful
experiment.
Name Institution E­mail Phone Student
Steven J Ostro Jet Propulsion Labo­
ratory
ostro@reason.jpl.nasa.gov 818­354­3173 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