Optical Light Curves of 42 Isis Taken in Support of Spitzer Space Telescope Observations

Details Optical Light Curves of 42 Isis Taken in Support of Spitzer Space Telescope Observations Optical Light Curves of 42 Isis Taken in Support of Spitzer Space Telescope Observations

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21340109h&link_type=abstract

American Astronomical Society, AAS Meeting #213, #401.09; Bulletin of the American Astronomical Society, Vol. 41, p.190

Astronomy and Astrophysics

Astronomy

Scientific paper

Images of the main belt asteroid 42 Isis were taken on March 1, 4, 6, 9, and 11 of 2008 with the 1-meter telescope at Table Mountain Observatory in SDSS g and r bands. These data were taken in conjunction with Spitzer Space Telescope observations of 42 Isis on March 6, 2008. Photometry was carried out on the images, and the calibrated data were plotted and folded at the known period of 13.597 hours to generate the light curve. The optical light curve approximately matches, to within 1.1 hours, the thermal light curve generated with data from the Spitzer Space Telescope. The phase shift of the two light curves may be indicative of thermal inertia and either the presence or absence of regolith on the surface of the asteroid. This work is being carried under the auspices of the Infrared Processing and Analysis Center at the California Institute of Technology.

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