THE POPULATION OF TINY NEAR-EARTH OBJECTS OBSERVED BY NEOWISE

被引：60

作者：

Mainzer, A. ^{[1
]}

Bauer, J. ^{[1
,2
]}

Grav, T. ^{[3
]}

Masiero, J. ^{[1
]}

Cutri, R. M. ^{[2
]}

Wright, E. ^{[4
]}

Nugent, C. R. ^{[1
]}

Stevenson, R. ^{[1
]}

Clyne, E. ^{[1
]}

Cukrov, G. ^{[1
]}

Masci, F. ^{[2
]}

机构：

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

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

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

[4] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 784卷 / 02期

基金：

美国国家航空航天局;

关键词：

atlases; catalogs; infrared: general; minor planets; asteroids: general; surveys; THERMAL-MODEL CALIBRATION; INFRARED-SURVEY-EXPLORER; WISE/NEOWISE OBSERVATIONS; PHASE CURVES; ASTEROIDS; PHOTOMETRY; SYSTEM;

D O I：

10.1088/0004-637X/784/2/110

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Only a very small fraction of the asteroid population at size scales comparable to the object that exploded over Chelyabinsk, Russia has been discovered to date, and physical properties are poorly characterized. We present previously unreported detections of 105 close approaching near-Earth objects (NEOs) by the Wide-field Infrared Survey Explorer (WISE) mission's NEOWISE project. These infrared observations constrain physical properties such as diameter and albedo for these objects, many of which are found to be smaller than 100 m. Because these objects are intrinsically faint, they were detected by WISE during very close approaches to the Earth, often at large apparent on-sky velocities. We observe a trend of increasing albedo with decreasing size, but as this sample of NEOs was discovered by visible light surveys, it is likely that selection biases against finding small, dark NEOs influence this finding.

引用

页数：7