Статья

ExploreNEOs. II. THE ACCURACY OF THE WARM<i>SPITZER</i>NEAR-EARTH OBJECT SURVEY

Alan W. HarrisDLR Institute of Planetary Research, Rutherfordstrasse 2, 12489 Berlin, Germany; [email protected]Michael MommertDLR Institute of Planetary Research, Rutherfordstrasse 2, 12489 Berlin, Germany; [email protected]Joseph L. HoraHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-65 Cambridge, MA 02138, USAMichael MuellerUniv. de Nice Sophia Antipolis, CNRS, Obs. de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, FranceDavid E. TrillingDepartment of Physics and Astronomy, Northern Arizona University, Flagstaff, AZ 86001, USAB. BhattacharyaNASA Herschel Science Center, Caltech, M/S 100-22, 770 South Wilson Ave. Pasadena, CA 91125, USAW. F. BottkeSouthwest Research Institute, 1050 Walnut St., Suite 300, Boulder, CO 80302, USASteven R. ChesleyJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USAMarco DelbóUniv. de Nice Sophia Antipolis, CNRS, Obs. de la Côte d'Azur, BP 4229, 06304 Nice Cedex 4, FranceJoshua P. EmeryDepartment of Earth and Planetary Sciences, University of Tennessee, 1412 Circle Dr., Knoxville, TN 37996, USAG. G. FazioHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-65 Cambridge, MA 02138, USAAmy MainzerJet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USABryan E. PenpraseDepartment of Physics and Astronomy, Pomona College, 610 N. College Avenue, Claremont, CA 91711, USAH. A. SmithHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-65 Cambridge, MA 02138, USAT. B. SpahrHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-65 Cambridge, MA 02138, USAJohn StansberrySteward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USACristina A. ThomasDepartment of Physics and Astronomy, Northern Arizona University, Flagstaff, AZ 86001, USA

2011en

ABI

Аннотация

We report on results of observations of near-Earth objects (NEOs) performed with the NASA Spitzer Space\nTelescope as part of our ongoing (2009–2011) Warm Spitzer NEO survey (“ExploreNEOs”), the primary aim of\nwhich is to provide sizes and albedos of some 700 NEOs. The emphasis of the work described here is an assessment\nof the overall accuracy of our survey results, which are based on a semi-empirical generalized model of asteroid\nthermal emission. The NASA Spitzer Space Telescope has been operated in the so-called Warm Spitzer mission\nphase since the cryogen was depleted in 2009 May, with the two shortest-wavelength channels, centered at 3.6 μm\nand 4.5 μm, of the Infrared Array Camera continuing to provide valuable data. The set of some 170 NEOs in our\ncurrent Warm Spitzer results catalog contains 28 for which published taxonomic classifications are available, and\n14 for which relatively reliable published diameters and albedos are available. A comparison of the Warm Spitzer\nresults with previously published results (“ground truth”), complemented by a Monte Carlo error analysis, indicates\nthat the rms Warm Spitzer diameter and albedo errors are ±20% and ±50%, respectively. Cases in which agreement\nwith results from the literature is worse than expected are highlighted and discussed; these include the potential\nspacecraft target 138911 2001 AE2. We confirm that 1.4 appears to be an appropriate overall default value for the\nrelative reflectance between the V band and the Warm Spitzer wavelengths, for use in correction of the Warm Spitzer\nfluxes for reflected solar radiation.

Перевод пока недоступен

Идентификаторы

DOI: 10.1088/0004-6256/141/3/75

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar