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The Impact and Recovery of Asteroid 2008 TC3

[2008 October 7, 2:46 UT]

[Story of the recovery of 2008 TC3 (with images)]

Publications

2012 July 19 - What cratered the Moon also destroyed a dwarf planet. In a paper in MAPS, Matthias Meier and collaborators report that the Ureilite Parent Body was last broken 3.8 billion years ago, at the time of the Late Heavy Bombardment. This means that the asteroid family responsible for sending 2008 TC3 and other ureilites our way, is dynamically very old.
[Press Release]
[Full article] MAPS

2010 December 15 - Special issue online! The Meteoritics and Planetary Science October/November 2010 double issue is devoted to the impact and recovery of 2008 TC3. The papers will appear online first on December 15.

NASA press release
NASA Goddard
Carnegie Institution of Washington

Point of Contact for media:
Rachel Hoover
NASA Ames Research Center (Public Affairs Office)
Tel.: 1-650-604-0643
Email: Rachel.L.Hoover [at] nasa.gov

Media access to papers, contact publisher:
Ben Norman
Life Science Publicist, Wiley-Blackwell
+44 (0) 1243 770 375 (U.K.)
Email: benorman [at] wiley.com

AGU Award: On December 15, at 7 pm, science journalist Roberta Kwok will be awarded a prestigious price by the American Geophysical Union for her Nature journal feature article on 2008 TC3. She will accept the price during an awards ceremony at the AGU General Assembly in San Francisco. [Press release]

Workshop

Papers in special issue:

Other papers prepared for this special issue (update: 2011 January 15):

    Papers accepted for next issue:
  • Ross et al. - "MicroRaman spectroscopy of diamond in Almahata Sitta and comparisons with other ureilites"
  • Kozubal et al. - "Photometric observations of Earth-impacting asteroid 2008 TC3"

  • Papers in review:
  • Hoffmann et al. - "Magnetism and mineralogy of Almahata Sitta polymict ureilite: implications for the ureilite parent body magnetic field"
Other publications:

Jenniskens et al., 2009. "The impact and recovery of asteroid 2008 TC3". Nature magazine, March 26

Borovicka and Charvat, 2009. "Meteosat observation of the atmospheric entry of 2008 TC3 over Sudan and the associated dust cloud". Astron. Astrophys. 507, 2009, 1015-1022.

Meetings

audience lunch posters

2009 December 6 - A 2008 TC3 Workshop was held at the Physics Department of Khartoum University, Sudan, on December 6 - 7 of 2009, one year after the first find, to discuss the results from the analysis of 2008 TC3's impact and recovered remnants. Immediately following, the Nubian Desert site was re-visited for an additional search to extend the range of meteorites recovered, after which some of Sudan's amazing archeological sites were visited on the way back (Dec 8-15). The workshop website is at:
[Scientific program, abstracts, pictures]

Other meetings:

74th Annual Meeting of the Meteoritical Society, University of Greenwich, London, UK (August 8-12, 2011)

Asteroids, Comets, Meteors 2011, Niigata, Japan (July 17-22, 2011)
Abstracts are due March 21.

European Geosciences Union General Assembly 2011, Vienna, Austria (April 3-18, 2011)
Several abstracts on the analysis of AS meteorites have been submitted.

42nd LUNAR AND PLANETARY SCIENCE CONFERENCE, Woodlands, Texas (March 7-11, 2011)
Several abstracts on the analysis of AS meteorites have been submitted.

DPS/AAS MEETING PASSADENA, CA (October 4-8, 2010)
Several posters and one oral presentation were devoted to 2008 TC3.

73rd annual METEORITICAL SOCIETY MEETING in New York (July 26-30, 2010)
Six Almahata Sitta Consortium abstracts were submitted to the meeting from work by Mikouchi, Meier, Murty, Sandford, Ross and Kohout. Update: Aidan Ross has won the prize for the best student abstract, for her abstract:
Raman analysis of diamond in Almahata Sitta and other ureilites (Ross, A. J., A. Steele, H. Downes, M. D. Fries, A. P. Jones, L. Kater, C. L. Smith, P. Jenniskens, M. H. Shaddad and M. Zolensky. 2010). 73rd Annual Meteoritical Society Meeting. Meteoritics & Planetary Science Vol. 45, Supplement, p. A174 [PDF]

Meteoroids 2010 (May 24-28, 2010)
An international conference on minor bodies in the solar system in Breckenridge, Colorado, will offered an opportunity to discuss results from the study of 2008 TC3 and its recovered fragments.

41st LUNAR AND PLANETARY SCIENCE CONFERENCE (March 1-5, 2010)
Papers on 2008 TC3 will be discussed at the LPSC meeting in The Woodlands, Texas in March. A special session "Ureilite asteroids: Insights from Almahata Sitta" will be held on Tuesday March 2 at 1:30 pm (Waterway Ballroom 1). A poster session will follow that day at 7:00 pm in the Town Center Exhibit Area.
[Special Session program] ; [Program poster session]

AAS / DPS MEETING (OCTOBER 4-9, 2009)
A topical session on the impact and recovery of 2008 TC3 was held at the DPS meeting in Puerto Rico on October 4-9, 2009, during the one-year aniversary of the fall.
[Program Topical Session]; [Abstracts]

Almahata Sitta Consortium

The following research teams (team lead given) are participating in a consortium established to coordinate the analysis of 2008 TC3 samples (POC) :
M. Shaddad	U. of Khartoum	Meteorite recovery	# all samples
P. Jenniskens	SETI Institute	Meteorite recovery	# selected samples

M. Zolensky	NASA/JSC	Petrograpy		#1,4,7,15,25,27,47,A100,2,16,33,41,22,27,S138,
							24,33,27,49,36,32,44,22
N. Kita		U. Wisconsin-Madison	SEM, EPMA, SIMS	#44,36,51,54
I. Hope		LLNL		TEM,SEM			#4,7
P. Warren	UCLA		SEM			#1,27

D. Rumble	Carnegie Inst.	Oxygen isotopes		#4,7,47,15,25,27,36,44,49,51,54,S138,22,24,A100,
							29,31,32,34,37,42,46,48,16,41

J. Friedman	Fordham U.	Bulk chemistry (ICPMS)	#4,7,47,15
S. Wolf		Indiana St. Un.	bulk chemistry (ICPMS)	#4,7,47,15
J. Kucera	Nuclear Phys. Inst., Czech Rep.	multi-element analysis	-.-

T. Hiroi	Brown U.	Reflection spectroscopy	#4,7,25,27,47,19,32,36,44,50,51,22,16
S. Sandford	NASA/Ames	IR spectroscopy		#4,7,15,19,24,25,27,28,29,
							#31,32,34,36,37,39,42,44,46
 							#47,48,49,50,51,52,53,54 
D. Lupishko 	Kharkiv, Ukraine	polarimetry	-.-	[needs large sample]

A. Steele	Carnegie Inst.	Raman spectroscopy	#7,#4
A. Morrow	Stanford U.	PAHs			#1,4,7,15,25,27,47[....]
D. Glavin	NASA/Goddard	amino acids		#4
A. Ross		Nat Hist Museum	carbon isotopes		#4,7,22,36,44
H. Imanaka	SETI Institute/LPL	high res MS	#22

K. Welten	UC Berkeley	Cosmic radio isotopes	#4, 47,1,15,36,44,25,A100
C. Taricco	Turin, Italy	gamma-ray spectr.	#15

R. Weiler	Switzerland	Nobel gasses		#4, 47
S. Murty	Navrangpura, India	Nobel gasses	#36, 44
U. Ott		MPI fur Chemie, Mainz	Nobel gasses 	#1,47
K. Nagao	University of Tokyo	Nobel gasses	#1,47
B. Marty	CRPG/CNRS, Nancy	Nobel gasses	#1,47

V. Hoffmann	Univ. Muenich	magnetic properties	#4,39

T. Kohout	Univ. Helsinki	density, magn. susc.	#22,27

G. Patesi	Univ. Firenze	cathodoluminescence	-.- [needs large samples]
H. Chennaoui	Hassan II Univ.	cathodoluminescence	-.- [needs thin section]

The following research teams are participating in the coordinated analysis of observations of 2008 TC3 and the impact:
S. Larson	Catalina Sky Survey	2008TC3: discovery
S. Chesley	NASA/JPL		2008TC3: orbit, impact trajectory
P. Chodas	NASA/JPL		2008TC3: orbit, impact  
A. Fitzimmons	Queens U. Belfast	2008TC3: spectroscopy
R. Dantowitz	Clay Center Obs.	2008TC3: imaging
P. Pravec	Ondrejov Observatory 	2008TC3: rotation curve
P. Scheirich	Ondrejov Observatory	2008TC3: shape model
J. Borovicka	Ondrejov Observatory	Impact: Meteosat 8 satelite data
M. Boslough	Sandia Nat. Lab.	Impact: USAF satellite data
P. Brown	U. Western Ontario	Impact: infrasound
W. Edwards	U. Western Ontario	Impact: dark flight
D. ReVelle	Los Alamos Nat. Lab.	Impact: modeling
O. Popova	Inst. Geosc. Moscow	Impact: modeling
J. Vaubaillon	IMCCE, Paris		Big picture: orbital dynamics
R. Binzel	MIT			Big picture: asteroid taxonomy

OVERVIEW OF RESEARCH ON ALMAHATA SITTA SAMPLES: 

Number:	Density (g/cm3)	Spectral shape  Albedo	d17 d18		Petr.	Min. 	Texture;Notes
 	[1]		[2]		[3]	[4]		[5]	[6]	[7]
Non-ureilite samples of 2008 TC3:
#16:	3.42+0.35/-0.17	-.-		-.-	-.-		n	-.-	EH6 chondrite
#25:	-.-		strong pyroxene 0.23	3.2 4.3		y	Prx	H5 chondrite 
#41:	3.16+0.12/-0.06	-.-		-.-	-.-		n	-.-	EL6 chondrite
#A100:	-.-		-.-		-.-	-.-		y	-.-	L4 chondrite

Ureilite samples: 
#1:	1.77+1.08/-0.39	-.-		-.-	-.-		y	-.-	layered
#4:	2.55+0.61/-0.26	flat spectrum	0.10	2.6 6.9		y	Oli	scruffy; *) **)
#7:	-.-		weak pyroxene	0.16	3.5 7.7		y	Oli	layered, porous
#13: 	-.-		-.-		-.-	-.-		n	-.-	full crust, oriented
#15:	3.11+0.14/-0.07	-.-		-.-	2.6 6.8		y	Mix	gamma-ray 
#19: 	-.-		-.-		-.-	-.-		n	Oli	(crumbs)
#22:	3.24+0.35/-0.17	-.-		-.-	-.-		n	-.-	
#24: 	2.72+0.31/-0.15	-.-		-.-	-.-		n	Oli	(crumbs)
#27:	2.83+0.07/-0.03	weak pyroxene	0.10	1.7 5.9		y	Oli	flaky 
#28:	2.57+0.25/-0.12	-.-		-.-	-.-		n	Oli	; weak band depth	
#29: 	2.81+0.16/-0.07	-.-		-.-	-.-		n	Mix	(crumbs)
#31: 	2.96+0.09/-0.05	-.-		-.-	-.-		n	Prx	(crumbs)
#32:	2.98+0.26/-0.12	-.-		-.-	-.-		n	Oli	(crumbs)
#33:	4.85+0.39/-0.17	-.-		-.-	-.-		n	-.-	ureilite/kam-troilite
#34: 	2.71+0.28/-0.13	-.-		-.-	-.-		n	Oli	(crumbs)
#36:	2.67+0.14/-0.06	-.-		-.-	1.3 5.3		n	Mix	fine grained 	**)
#37: 	-.-		-.-		-.-	-.-		n	Oli	(crumbs)
#39: 	-.-		-.-		-.-	-.-		n	Oli	single fragment
#42: 	2.95+0.12/-0.06	-.-		-.-	-.-		n	Mix	(crumbs)
#44: 	-.-		-.-		-.-	2.7 7.1		n	Oli	fragments only **)
#46: 	2.82+0.17/-0.08	-.-		-.-	-.-		n	Oli	(crumbs)
#47:	2.96+0.44/-0.21	weak pyroxene	0.11	3.3 8.0		y	Oli	weathered pieces **)
#48: 	2.88+0.19/-0.09	-.-		-.-	-.-		n	Oli	(crumbs)
#49:	2.55+2.66/-0.75	-.-		-.-	2.6 6.9		n	Oli	(crumbs)
#50:	2.37+1.49/-0.52	-.-		-.-	-.-		n	Oli	(crumbs)
#51:	2.70+0.49/-0.22	-.-		-.-	0.9 5.3		n	Prx	(crumbs)
#52: 	2.57+0.53/-0.12	-.-		-.-	-.-		n	Mix	(crumbs)
#53: 	2.40+0.23/-0.11	-.-		-.-	-.-		n	Oli	(crumbs)
#54:	2.57+0.20/-0.09	-.-		-.-	0.4 5.1		n	Oli	(crumbs)
#S138:	-.-		-.-		-.-	-.-		y	Oli	ureilite	

Ref.:
*) amino acid analyis
**) cosmic ray and nobel gasses

[1] Densities measured by Jenniskens using sand method (Shaddad et al., 2010)
[2] From data by Hiroi et al. (2010)
[3] From data by Hiroi et al. (2010)
[4] From data by Rumble et al. (2010)
[5] Petrographic study done, from data by Zolensky et al. (2010)
[6] Dominant mineral type determined by mid-IR spectroscopy, data by Sandford et al. (2010)
[7] Typing from petrography by Zolensky; Descriptions from photographs by Jenniskens


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