Vestoids, Part II: The basaltic nature and hed meteorite analogs for eight Vp-type asteroids and their associations with (4) Vesta

Paul S. Hardersen, Vishnu Reddy, Rachel Roberts

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Improving the constraints on the abundance of basaltic asteroids in the main asteroid belt is necessary for better understanding the thermal and collisional environment in the early solar system, for more rigorously identifying the genetic family for (4) Vesta, for determining the effectiveness of Yarkovsky/YORP in dispersing asteroid families, and for better quantifying the population of basaltic asteroids in the outer main belt (a > 2.5 AU) that is likely unrelated to (4) Vesta. Near-infrared (NIR) spectral observations in this work were obtained for the Vp-type asteroids (2011) Veteraniya, (5875) Kuga, (8149) Ruff, (9147) Kourakuen, (9553) Colas, (15237) 1988 RL6, (31414) Rotaryusa, and (32940) 1995 UW4 during 2014 August/September utilizing the SpeX spectrograph at the NASA Infrared Telescope Facility, Mauna Kea, Hawaii. Spectral band parameter (band centers, band area ratios) and mineralogical analysis (pyroxene chemistry) for each average asteroid NIR reflectance spectrum suggest a howardite-eucrite-diogenite meteorite analog for each asteroid. (5875) Kuga is most closely associated with the eucrite meteorites, (31414) Rotaryusa is most closely associated with the diogenites, and the remaining other six asteroids are most closely associated with the howardite meteorites. Along with their orbital locations in the inner main belt and in the vicinity of (4) Vesta, the existing evidence suggests that these eight Vp-type asteroids are also likely Vestoids.

Original languageEnglish (US)
Article number19
JournalAstrophysical Journal, Supplement Series
Volume221
Issue number1
DOIs
StatePublished - Nov 1 2015
Externally publishedYes

Keywords

  • asteroids: general
  • asteroids: individual (Vesta)
  • astrochemistry
  • meteorites
  • meteoroids - minor planets
  • meteors
  • minor planets
  • techniques: spectroscopic

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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