Photometric survey of the very small near-Earth asteroids with the SALT telescope - III. Lightcurves and periods for 12 objects and negative detections

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Table 4:

Tensile strengths of selected stony fireballs.
Meteorite		D	k	$\kappa$	Ref.
		[m]	[MPa]	[N m^-3/2]
Almahata Sitta	1st fragm.	4	0.2-0.3	$3\times 10^5$	(1)
	main fragm.	4	1	$1\times 10^6$
EN070591	1st fragm.	1.4	<0.4	< $3\times 10^5$	(2)
	main fragm.	1.4	9	$6\times 10^6$
EN171101	1st fragm.	1.4	4	$3\times 10^6$	(2)
	main fragm.	1.4	12	$9\times 10^6$
Carancas	no fragm.	0.9-1.7	>16	> $1\times10^7$	(2)
Granit	lab. sample	0.03	10	$2\times 10^6$	(3)

Notes. D is the effective diameter, given in the literature or computed by us from the estimated mass under the assumption of a bulk density of $\rho=2500~{\rm kg}~{\rm m}^{-3}$ , k is the tensile strength, and $\kappa$ is the tensile strength coefficient. Almahata Sitta originates from 2008 TC₃
References: (1) Jenniskens et al. (2009); (2) Borovicka & Spurný (2008); (3) Housen & Holsapple (1999).

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