Taxonomic Classification of 2018 CB During its Close Approach to Earth

Abstract

We present the results of a low resolution optical spectroscopic observation of Near-Earth Asteroid (NEA) 2018 CB during its close approach to Earth, conducted with the 2.1 m telescope of the Guillermo Haro Astrophysical Observatory (OAGH), located in Cananea, Sonora, Mexico, using a Boller & Chivens Spectrograph, with a grating of 50 l/mm that covers the interval between 4000Å and 9500Å. The taxonomic classification was performed using the values of the "spectral distance" (D_x), calculated with respect to the mean spectra of the 24 taxonomic classes of DeMeo et al. (2009), and also with respect to individual asteroid spectra from the Phase II of the Small Main-Belt Asteroid Spectroscopy Survey (SMASSII). We determined that 2018 CB is an Xk-class NEA.