Finding Variable Asteroids

Details Finding Variable Asteroids Finding Variable Asteroids

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dda....40.0607h&link_type=abstract

American Astronomical Society, DDA meeting #40, #6.07; Bulletin of the American Astronomical Society, Vol. 41, p.900

Astronomy and Astrophysics

Astronomy

Scientific paper

The light curve of an asteroid can reveal its spin period and give information about its shape. An asteroid's light curve changes as our viewing angle changes throughout its orbit. Before investing telescope time to acquire a high-quality light curve, it is helpful to know that an asteroid will have a significant and detectable photometric amplitude during the observing season.
The Flagstaff Astrometric Scanning Transit Telescope (the Ron Stone Telescope, or FASTT) typically acquires five observations each year of the brightest 5700 asteroids. Accurate astrometry is the primary purpose of the data, and it is being used to improve the ephemerides. As a bi-product, R-band magnitudes are measured for every observation. These photometric data are useful for identifying variable asteroids, and for estimating the amplitude of variability each year and how much the amplitude changes from year to year. This paper will summarize the available data and give examples. This work is supported by the NASA PAST and DSN Programs.

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