title: The impact and recovery of asteroid 2008 TC(3).
abstract: In the absence of a firm link between individual meteorites and their asteroidal parent bodies, asteroids are typically characterized only by their light reflection properties, and grouped accordingly into classes. On 6 October 2008, a small asteroid was discovered with a flat reflectance spectrum in the 554-995 nm wavelength range, and designated 2008 TC(3) (refs 4-6). It subsequently hit the Earth. Because it exploded at 37 km altitude, no macroscopic fragments were expected to survive. Here we report that a dedicated search along the approach trajectory recovered 47 meteorites, fragments of a single body named Almahata Sitta, with a total mass of 3.95 kg. Analysis of one of these meteorites shows it to be an achondrite, a polymict ureilite, anomalous in its class: ultra-fine-grained and porous, with large carbonaceous grains. The combined asteroid and meteorite reflectance spectra identify the asteroid as F class, now firmly linked to dark carbon-rich anomalous ureilites, a material so fragile it was not previously represented in meteorite collections.
authors.affiliation: SETI Institute, Carl Sagan Center, 515 North Whisman Road, Mountain View, California 94043, USA. Petrus.M.Jenniskens@nasa.gov
authors.forename: P
authors.initials: P
authors.lastname: Jenniskens
authors.forename: M H
authors.initials: MH
authors.lastname: Shaddad
authors.forename: D
authors.initials: D
authors.lastname: Numan
authors.forename: S
authors.initials: S
authors.lastname: Elsir
authors.forename: A M
authors.initials: AM
authors.lastname: Kudoda
authors.forename: M E
authors.initials: ME
authors.lastname: Zolensky
authors.forename: L
authors.initials: L
authors.lastname: Le
authors.forename: G A
authors.initials: GA
authors.lastname: Robinson
authors.forename: J M
authors.initials: JM
authors.lastname: Friedrich
authors.forename: D
authors.initials: D
authors.lastname: Rumble
authors.forename: A
authors.initials: A
authors.lastname: Steele
authors.forename: S R
authors.initials: SR
authors.lastname: Chesley
authors.forename: A
authors.initials: A
authors.lastname: Fitzsimmons
authors.forename: S
authors.initials: S
authors.lastname: Duddy
authors.forename: H H
authors.initials: HH
authors.lastname: Hsieh
authors.forename: G
authors.initials: G
authors.lastname: Ramsay
authors.forename: P G
authors.initials: PG
authors.lastname: Brown
authors.forename: W N
authors.initials: WN
authors.lastname: Edwards
authors.forename: E
authors.initials: E
authors.lastname: Tagliaferri
authors.forename: M B
authors.initials: MB
authors.lastname: Boslough
authors.forename: R E
authors.initials: RE
authors.lastname: Spalding
authors.forename: R
authors.initials: R
authors.lastname: Dantowitz
authors.forename: M
authors.initials: M
authors.lastname: Kozubal
authors.forename: P
authors.initials: P
authors.lastname: Pravec
authors.forename: J
authors.initials: J
authors.lastname: Borovicka
authors.forename: Z
authors.initials: Z
authors.lastname: Charvat
authors.forename: J
authors.initials: J
authors.lastname: Vaubaillon
authors.forename: J
authors.initials: J
authors.lastname: Kuiper
authors.forename: J
authors.initials: J
authors.lastname: Albers
authors.forename: J L
authors.initials: JL
authors.lastname: Bishop
authors.forename: R L
authors.initials: RL
authors.lastname: Mancinelli
authors.forename: S A
authors.initials: SA
authors.lastname: Sandford
authors.forename: S N
authors.initials: SN
authors.lastname: Milam
authors.forename: M
authors.initials: M
authors.lastname: Nuevo
authors.forename: S P
authors.initials: SP
authors.lastname: Worden