7/26/2023 0 Comments Fityk diameterSince the first discovery of asteroids with spectra similar to Vesta near the 3:1 mean motion resonance with Jupiter ( Binzel & Xu 1993), numerous other asteroids with V-type spectra were identified beyond the nominal borders of the family. 2012) most probably represent the origin of the Vesta dynamical family. Two craters in the south pole of Vesta identified by the Dawn mission ( Marchi et al. Most of the discovered V-type asteroids belong to the Vesta collisional family in the inner main belt. In the middle of this series are the howardites, considered to be breccias composed of debris from both eucrites and diogenites ( Hutchison 2004). They are one of the extremes in a series that has diogenites (Ca-poor pyroxenes) on the other side. Eucrites are composed of Ca-pyroxene and Ca-plagioclase, the fundamental minerals of basalts. Due to the spectroscopic similarities with basaltic achondrites, Vesta is also considered the parent body of howardites, eucrites, and diogenites, also known as HEDs ( Drake 2001). The visible and near-infrared (NIR) spectra of V-type asteroids exhibit two characteristic absorption bands positioned near 1 and 2 μm. Their taxonomic classification is derived from asteroid (4) Vesta, which is the largest “small body” (530 km in diameter) to show a basaltic crust ( McCord et al. V-type asteroids are basaltic bodies that are rich in pyroxene and are believed to represent the crust of larger differentiated bodies. Key words: minor planets, asteroids: general / techniques: spectroscopic In the middle and outer main belt, where the amount of data is more limited, the proportion of false positives increases. The identification of V-types in the inner main-belt is more likely due to the presence of the Vesta family and other nearby asteroids that had escaped from the family. Overall, our results demonstrate the efficiency of the MOVIS catalogue in identifying V-type objects, with a success rate of over 85%. The spectrum of (14390) 1990 QP 10 is similar to a V-type but it shows unique spectral features that suggest a peculiar composition. The spectrum of asteroid (7302) is not consistent with a basaltic composition and likely reflects an S-type body. We confirm the diogenite-like composition of (2452) Lyot. Additionally, we analysed three peculiar outer main belt V-type candidates based on their visible + NIR spectra. Based on the analysis of their visible spectra, we confirm 11 new V-type asteroids: six low-i asteroids – (3188) Jekabsons, (3331) Kvistaberg, (4693) Drummond, (7223) Dolgorukij, (9007) James Bond, and (29733) 1999 BA4 along with four inner-other asteroids – (5524) Lecacheux, (19983) 1990 DW, (51742) 2001 KE 55, and (90023) 2003 BD 13 as well as one fugitive – (2275) Cuitlahuac. The computed visible and NIR spectral parameters are used to investigate evidence of space-weathering or mineralogical differences from the expected basaltic composition. In this work, we aim to provide a spectral analysis of 14 V-type candidates of various dynamical types. Using the near-infrared (NIR) colour data in the Moving Objects from VISTA Survey (MOVIS) catalogue, a list of 477 V-type candidates was compiled, with more than half of them outside the Vesta family. The rising discoveries of V-type asteroids that are not linked to the Vesta family dynamically suggest that a number of major basaltic bodies may have been present during the early stages of the solar system. Most of the currently known basaltic (V-type) asteroids are believed to be past or present members of the Vesta dynamical family. International Centre for Advanced Training and Research in Physics,įaculty of Science and Engineering, University of Groningen, Pavol Matlovič 1, Julia de Leon 2 ,3, Hissa Medeiros 2 ,3, Marcel Popescu 2 ,4, Juan Luis Rizos 2 ,3 and Jad-Alexandru Mansour 5 ,6įaculty of Mathematics, Physics and Informatics, Comenius University,Į-mail: de Astrofísica de Canarias (IAC),ĭepartamento de Astrofísica, Universidad de La Laguna,Īstronomical Institute of the Romanian Academy, Astronomical objects: linking to databases.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes
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