TY  - JOUR
T1  - Rotationally Resolved Spectroscopic Characterization of Near-Earth Object (3200) Phaethon
A1  - Kareta, Theodore
A1  - Reddy, Vishnu
A1  - Hergenrother, Carl
A1  - Lauretta, Dante S.
A1  - Arai, Tomoko
A1  - Takir, Driss
A1  - Sanchez, Juan
A1  - Hanuš, Josef
JA  - The Astronomical Journal
Y1  - 2018
VL  - 156
SP  - 287
SN  - 0004-6256
UR  - https://ui.adsabs.harvard.edu/abs/2018AJ....156..287K
KW  - asteroids: general
KW  - asteroids: individual: Phaethon
KW  - Astrophysics - Earth and Planetary Astrophysics
KW  - meteorites
KW  - meteoroids
KW  - meteors
KW  - minor planets
KW  - techniques: spectroscopic
N2  - (3200) Phaethon is a compelling object as it has an asteroidal
M1  - ={appearance and spectrum
M1  -  produces a weak dust tail during perihelion at
M1  -  just 0.14 au
M1  -  and is the parent body of the Geminid Meteor Shower. A
M1  -  better understanding of the physical properties of Phaethon is needed to
M1  -  understand the nature of its current and previous activity
M1  -  relationship
M1  -  to potential source populations
M1  -  and to plan for the upcoming flyby of
M1  -  the DESTINY+ spacecraft of Phaethon in the 2020s. We performed
M1  -  rotationally resolved spectroscopy of Phaethon at visible and near-
M1  -  infrared wavelengths (0.4-2.5 μm) in 2007 and 2017
M1  -  respectively
M1  -  to
M1  -  better understand its surface properties. The visible and near-infrared
M1  -  observations both spanned nearly a full rotation or more and were under
M1  -  similar observing geometries
M1  -  covering the entire surface with the
M1  -  exception of the north pole. The visible wavelengths show blue slopes
M1  -  with only minor slope variations and no absorption features. The NIR
M1  -  data is minimally varying and concave upwards
M1  -  from very blue to blue-
M1  -  neutral with increasing wavelength. We fit the short-wavelength tail of
M1  -  Phaethon’s thermal emission and retrieve an average visible albedo of p
M1  -  <SUB> v </SUB> = 0.08 ± 0.01
M1  -  which is lower than previous measurements
M1  -  but plausible in light of the recent larger radar-measured diameter of
M1  -  Phaethon. We retrieve an average infrared beaming parameter of Phaethon
M1  -  of η = 1.70 ± 0.05
M1  -  which is similar to previous results. We discuss the
M1  -  implications of Phaethon’s visible and near-infrared spectrum as well as
M1  -  the lower albedo on its origin
M1  -  source population
M1  -  and evolutionary
M1  -  history.
M1  -  10.3847/1538-3881/aaeb8a
M1  -  eprint: arXiv:1810.11157}
ER  -