title: An anomalous basaltic meteorite from the innermost main belt.
abstract: Triangulated observations of fireballs allow us to determine orbits and fall positions for meteorites. The great majority of basaltic meteorites are derived from the asteroid 4 Vesta. We report on a recent fall that has orbital properties and an oxygen isotope composition that suggest a distinct parent body. Although its orbit was almost entirely contained within Earth's orbit, modeling indicates that it originated from the innermost main belt. Because the meteorite parent body would likely be classified as a V-type asteroid, V-type precursors for basaltic meteorites unrelated to Vesta may reside in the inner main belt. This starting location is in agreement with predictions of a planetesimal evolution model that postulates the formation of differentiated asteroids in the terrestrial planet region, with surviving fragments concentrated in the innermost main belt.
authors.affiliation: IARC, Department of Earth Science and Engineering, Imperial College London, London SW7 2AZ, UK. p.a.bland@imperial.ac.uk
authors.forename: Philip A
authors.initials: PA
authors.lastname: Bland
authors.forename: Pavel
authors.initials: P
authors.lastname: Spurny
authors.forename: Martin C
authors.initials: MC
authors.lastname: Towner
authors.forename: Alex W R
authors.initials: AW
authors.lastname: Bevan
authors.forename: Andrew T
authors.initials: AT
authors.lastname: Singleton
authors.forename: William F
authors.initials: WF
authors.lastname: Bottke
authors.forename: Richard C
authors.initials: RC
authors.lastname: Greenwood
authors.forename: Steven R
authors.initials: SR
authors.lastname: Chesley
authors.forename: Lukas
authors.initials: L
authors.lastname: Shrbeny
authors.forename: Jiri
authors.initials: J
authors.lastname: Borovicka
authors.forename: Zdenek
authors.initials: Z
authors.lastname: Ceplecha
authors.forename: Terence P
authors.initials: TP
authors.lastname: McClafferty
authors.forename: David
authors.initials: D
authors.lastname: Vaughan
authors.forename: Gretchen K
authors.initials: GK
authors.lastname: Benedix
authors.forename: Geoff
authors.initials: G
authors.lastname: Deacon
authors.forename: Kieren T
authors.initials: KT
authors.lastname: Howard
authors.forename: Ian A
authors.initials: IA
authors.lastname: Franchi
authors.forename: Robert M
authors.initials: RM
authors.lastname: Hough