NOAO >   Observing Info >   Approved Programs >   2017B-0069

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Program Information for 2017B-0069


PI: Robert S McMillan, U. of Arizona, bob@lpl.arizona.edu
Address: Lunar and Planetary Laboratory, 1629 East University Boulevard, Tucson, AZ 85721-0092 USA

CoI: Jim Scotti, Lunar and Planetary Lab
CoI: Melissa J Brucker, Lunar and Planetary Lab
CoI: Jeffrey A Larsen, US Naval Academy
CoI: Terry Bressi, Lunar and Planetary Lab

Title: Search, Recovery, and Astrometry of Closely-Approaching Asteroid 2012 TC4

Abstract: We request dark time with MOSAIC3 on the Mayall 4-meter telescope to search for, recover, and do astrometry on minor planet 2012 TC4 which will make a close return approach to Earth in 2017 October. Being only about 20 meters in diameter, it represents one of the monolithic components of larger asteroids and may have a regolith-free surface of high thermal inertia. This return apparition spanning a wide range of phase angles at bright magnitudes provides a rare opportunity for detailed studies that were impossible to arrange at discovery time. The object will next become observable on 2017 August 27-30 UT at V=24.4. During that interval, the 3-sigma positional uncertainty can be covered by two or three pointings with MOSA3. Later, the object will be brighter, but increasingly longer arcs, up to many tens of degrees, would have to be searched. Recovery in August will establish an ephemeris accurate enough in October for lightcurve, radar, infrared, and spectroscopic observations by the wider community of researchers.

Program Type: Standard/Solar System

Scheduled Nights:
Run 1 (2017B):  KP-4m/MOSA3 -- 2n on Aug 29 - Aug 30 2017, Sep 12 - Sep 13 2017


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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