[meteorite-list] Vesta-Howardite confirmation and other new parent body research findings

From: Galactic Stone & Ironworks <*meteoritemike_at_meteoritecentral.com*> Date: Sun, 13 Nov 2011 12:55:05 -0500 Message-ID: <CAKBPJW-jtJK3itWqFZLMA2UX2txTExfu8moa+yg201LsfNNiBg_at_mail.gmail.com> · meteoritemike_at_meteoritecentral.com

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Galactic Stone & Ironworks - Meteorites & Amber (Michael Gilmer)
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On 11/13/11, MexicoDoug <mexicodoug at aim.com> wrote:
> Dear List,
>
> Here are 3 more articles from the Dec. 2011 issue of Icarus.
>
> (1) Confirms a good Howardite match for Vesta by DAWN;
> (2) DAWN related looks at how CM2 material on Vesta modifies the
> Framing Camera spectra;
> (3) Looks at Asteroid (101955) 1999 RQ36 and suggests an association
> with CM1's
>
> Kijndest wishes
> Doug
>
>
> Ultraviolet spectroscopy of Asteroid (4) Vesta
> Pages 640-649
>
> Highlights
> ? Multi-instrument measurements of Vesta?s geometric albedo in the UV
> and visible.
> ? No UV spectral bluing or lightcurve reversal on Vesta.
> ? Longitudinal variation of Vesta UV spectral slope matches that in
> visible.
> ? Fine-grained howardite matches Vesta?s spectrum from 220 nm to 950
> nm.
> ? No evidence of space weathering in the UV?visible spectroscopy and
> lightcurve.
>
> =================================================================
>
> How to characterize terrains on 4 Vesta using Dawn Framing Camera color
> bands?
> Pages 376-386
>
> Highlights
> ? We present methods to classify terrains on Vesta using Dawn Framing
> Camera images.
> ? Effects of exogenous material (CM2) on FC color spectra are also
> presented.
> ? Pseudo Band I minimum can be used to derive ferrosilite content of
> the surface.
>
> ================================================================
>
> Asteroid (101955) 1999 RQ36: Spectroscopy from 0.4 to 2.4 ?m and
> meteorite analogs
> Pages 462-475
>
> "We speculate that RQ36 is composed of a ?CM1?-like material."
>
> ? We present reflectance spectra from 0.4 to 2.4 microns of asteroid
> (101955) 1999 RQ36.
> ? RQ36 is the target of the OSIRIS-REx spacecraft mission.
> ? We performed parametric tests and a least-squares search through
> RELAB meteorite data.
> ? Results show that CI and/or CM meteorites are the most likely
> meteorite analogs for RQ36.
> ? We also compare RQ36 with other known B-type asteroids measured by
> Clark et al. (2010).
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