The Phase Function of Main-Belt Comet P/2008 R1 (Garradd)

Details The Phase Function of Main-Belt Comet P/2008 R1 (Garradd) The Phase Function of Main-Belt Comet P/2008 R1 (Garradd)

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21933410m&link_type=abstract

American Astronomical Society, AAS Meeting #219, #334.10

Astronomy and Astrophysics

Astronomy

Scientific paper

We present observations of the Main-Belt Comet P/2008 R1 (Garradd) allowing the study of the object's phase function. Main-Belt Comets are characterized as having orbits indistinguishable from main-belt asteroids and exhibiting cometary activity. While inactive, images of Garradd were taken by the Gemini North telescope atop Mauna Kea allowing us to measure the absolute magnitude HR = 20.3 ± 0.1 mag and slope parameter G = 0.08 ± 0.05 used in the IAU phase function. Assuming an R-band albedo of pR = 0.05 we determine an effective radius of rN ≈ 0.22 km. Knowledge of the phase function and radius allows us to look at 2008 observations of Garradd when it was active and quantify dust mass loss.

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