PRELIMINARY ANALYSIS OF WISE/NEOWISE 3-BAND CRYOGENIC AND POST-CRYOGENIC OBSERVATIONS OF MAIN BELT ASTEROIDS

被引：86

作者：

Masiero, Joseph R. ^{[1
]}

Mainzer, A. K. ^{[1
]}

Grav, T. ^{[2
]}

Bauer, J. M. ^{[1
,3
]}

Cutri, R. M. ^{[3
]}

Nugent, C. ^{[4
]}

Cabrera, M. S. ^{[1
,5
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] Planetary Sci Inst, Tucson, AZ 85719 USA

[3] CALTECH, Infrared Proc & Anal Ctr, Pasadena, CA 91125 USA

[4] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA

[5] Calif State Polytech Univ Pomona, Pomona, CA 91768 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2012年 / 759卷 / 01期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

minor planets; asteroids:; general; INFRARED-SURVEY-EXPLORER; NEOWISE;

D O I：

10.1088/2041-8205/759/1/L8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present preliminary diameters and albedos for 13511 Main Belt asteroids (MBAs) that were observed during the 3-Band Cryo phase of the Wide-field Infrared Survey Explorer (WISE; after the outer cryogen tank was exhausted) and as part of the NEOWISE Post-Cryo Survey (after the inner cryogen tank was exhausted). With a reduced or complete loss of sensitivity in the two long wavelength channels of WISE, the uncertainty in our fitted diameters and albedos is increased to similar to 20% for diameter and similar to 40% for albedo. Diameter fits using only the 3.4 and 4.6 mu m channels are shown to be dependent on the literature optical H absolute magnitudes. These data allow us to increase the number of size estimates for large MBAs which have been identified as members of dynamical families. We present thermal fits for 14 asteroids previously identified as the parents of a dynamical family that were not observed during the fully cryogenic mission.

引用

页数：5

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