Rotationally Resolved Spectroscopic Characterization of Near-Earth Object (3200) Phaethon
| Type of publication: | Article |
| Citation: | |
| Publication status: | Published |
| Journal: | The Astronomical Journal |
| Volume: | 156 |
| Year: | 2018 |
| Month: | dec |
| Pages: | 287 |
| ISSN: | 0004-6256 |
| URL: | https://ui.adsabs.harvard.edu/... |
| Abstract: | (3200) Phaethon is a compelling object as it has an asteroidal |
| Userfields: | ={appearance and spectrum, produces a weak dust tail during perihelion at, just 0.14 au, and is the parent body of the Geminid Meteor Shower. A, better understanding of the physical properties of Phaethon is needed to, understand the nature of its current and previous activity, relationship, to potential source populations, and to plan for the upcoming flyby of, the DESTINY+ spacecraft of Phaethon in the 2020s. We performed, rotationally resolved spectroscopy of Phaethon at visible and near-, infrared wavelengths (0.4-2.5 μm) in 2007 and 2017, respectively, to, better understand its surface properties. The visible and near-infrared, observations both spanned nearly a full rotation or more and were under, similar observing geometries, covering the entire surface with the, exception of the north pole. The visible wavelengths show blue slopes, with only minor slope variations and no absorption features. The NIR, data is minimally varying and concave upwards, from very blue to blue-, neutral with increasing wavelength. We fit the short-wavelength tail of, Phaethon’s thermal emission and retrieve an average visible albedo of p, v = 0.08 ± 0.01, which is lower than previous measurements, but plausible in light of the recent larger radar-measured diameter of, Phaethon. We retrieve an average infrared beaming parameter of Phaethon, of η = 1.70 ± 0.05, which is similar to previous results. We discuss the, implications of Phaethon’s visible and near-infrared spectrum as well as, the lower albedo on its origin, source population, and evolutionary, history., 10.3847/1538-3881/aaeb8a, eprint: arXiv:1810.11157}, |
| Keywords: | asteroids: general, asteroids: individual: Phaethon, Astrophysics - Earth and Planetary Astrophysics, meteorites, meteoroids, meteors, minor planets, techniques: spectroscopic |
| Authors | |
| Added by: | [JoH] |
| Total mark: | 0 |
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