@article{d531f09aed1a4b4f83a290203f451fb0,
title = "Near-earth asteroid: (285263) 1998 QE2",
abstract = "We present the results of an integrated effort to constrain the thermal and surface properties of near-Earth asteroid (285263) 1998 QE2 using the NASA Infrared Telescope Facility (IRTF) during a historically approach to the Earth in May 2013. The near-infrared spectrum of (285263) 1998 QE2 is red, featureless, and exhibits a strong thermal excess beyond 2.0 μm. We model this thermal excess using the Near-Earth Asteroid Thermal Model and retrieved a model visual albedo of 0.04 ± 0.01, consistent with previous observations. Comparison with newly obtained laboratory spectra of the CM2 chondrites Murchison and the recently fallen Aguas Zarcas as well as archival spectra of Nogoya reveal that QE2 has a more Murchison/Aguas Zargas-like spectrum throughout the NIR. However, our spectrum of (285263) 1998 QE2 does not show the 0.7-μm feature observed by others and also visible in the laboratory spectra of CM2 carbonaceous chondrites. A better understanding of QE2's physical properties could help constrain models of the formation of other low-albedo NEA binaries.",
keywords = "Asteroids, Asteroids composition, Infrared observations, Mineralogy, Near-earth objects",
author = "Fieber-Beyer, {Sherry K.} and Theodore Kareta and Vishnu Reddy and Gaffey, {Michael J.}",
note = "Funding Information: We acknowledge and thank Neil Pearson and David Cantillo for assistance in preparation and acquisition of the new laboratory spectra of Aguas Zarcas and Murchison. Portions of this work were supported by the NASA Near-Earth Objects Observations/Planetary Astronomy Program grant NNX12AG12G and NASA Near-Earth Object Observations Grant NNX17AJ19G . We thank the IRTF TAC for awarding time to this project, and to the IRTF TOs and MKSS staff for their support. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Funding Information: We acknowledge and thank Neil Pearson and David Cantillo for assistance in preparation and acquisition of the new laboratory spectra of Aguas Zarcas and Murchison. Portions of this work were supported by the NASA Near-Earth Objects Observations/Planetary Astronomy Program grant NNX12AG12G and NASA Near-Earth Object Observations Grant NNX17AJ19G. We thank the IRTF TAC for awarding time to this project, and to the IRTF TOs and MKSS staff for their support. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. Publisher Copyright: {\textcopyright} 2020 Elsevier Inc.",
year = "2020",
month = sep,
day = "1",
doi = "10.1016/j.icarus.2020.113807",
language = "English (US)",
volume = "347",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",
}