THE NUCLEUS OF MAIN-BELT COMET 259P/GARRADD

被引：15
|
作者：
MacLennan, Eric M. [1 ,2 ,3 ]
Hsieh, Henry H. [1 ]
机构：
[1] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
[2] Univ Arizona, Dept Phys & Astron, Flagstaff, AZ 86001 USA
[3] Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2012年 / 758卷 / 01期
基金：
美国国家科学基金会;
关键词：
comets: general; comets: individual (259P/Garradd); minor planets; asteroids:; general; PHYSICAL-PROPERTIES; P/2006; VW139; 133P/ELST-PIZARRO; COLORIMETRY; EVOLUTION; ORIGIN; BODIES; ICE;
D O I：
10.1088/2041-8205/758/1/L3
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present observations of the main-belt comet 259P/Garradd, previously known as P/2008 R1 (Garradd), obtained in 2011 and 2012 using the Gemini North Telescope on Mauna Kea in Hawaii and the SOAR telescope at Cerro Pachon in Chile, with the goal of computing the object's phase function and nucleus size. We find an absolute magnitude of H-R = 19.71 +/- 0.05 mag and slope parameter of G(R) = -0.08 +/- 0.05 for the inactive nucleus, corresponding to an effective nucleus radius of r(e) = 0.30 +/- 0.02 km, assuming an R-band albedo of p(R) = 0.05. We also revisit observations reported for 259P while it was active in 2008 to quantify the dust mass loss and compare the object with other known main-belt comets.
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页数：6
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