Properties of the nuclei and comae of 13 ecliptic comets from Hubble Space Telescope snapshot observations

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Volume 508 / No 2 (December III 2009)

A&A, 508 2 (2009) 1045-1056

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Table 6:

Properties of the comae of the comets: dust production rate and spectral reflectivity gradient.
Comet	$r_{\rm h}$	Typical		Depleted		$S^\prime$	Remark
		$Q_{\rm H_2O}$	$Q_{\rm d}$	$Q_{\rm H_2O}$	$Q_{\rm d}$	(%/kÅ)
	(AU)	(mol s^-1)	(kg s^-1)	(mol s^-1)	(kg s^-1)
4P/Faye	2.956^O	-	-	$2.2\times10^{26}$	0.8
	1.604^I	-	-	$6.9\times10^{27}$ ^*	127		L+96
	1.594^O	-	-	$6.9\times10^{27}$ ^*	153		L+96
10P/Tempel 2	1.669^I	$1.8\times10^{27}$	2	-	-	12.4 $\pm$ 2.9
17P/Holmes	3.116^I	$1.4\times10^{27}$	4	$4.4\times10^{26}$	1
37P/Forbes	2.270^O	$2.6\times10^{27}$	11	$8.1\times10^{26}$	4	16.1 $\pm$ 3.0
	2.06^I	$Q_{\rm d} = 9.81$		NS85
44P/Reinmuth 2	2.727^I	$6.3\times10^{27}$	9	$1.9\times10^{27}$	3
50P/Arend	2.374^O	$4.2\times10^{27}$	11	$1.3\times10^{27}$	4	9.3 $\pm$ 3.3
59P/Kearns-Kwee	2.516^O	$9.7\times10^{26}$	5	-	-	10.5 $\pm$ 2.1
	2.27^I	$Q_{\rm d} = 24.75$		NS85
63P/Wild 1	2.266^O	$1.0\times10^{27}$	4	$3.1\times10^{26}$	1	27.0 $\pm$ 3.3
71P/Clark	2.715^I	$4.9\times10^{27}$	13	$1.5\times10^{27}$	5
84P/Giclas	2.209^O	$4.4\times10^{27}$	13	$1.3\times10^{27}$	5
106P/Schuster	1.666^I	$7.5\times10^{27}$	20	$2.3\times10^{27}$	8	12.1 $\pm$ 2.9
112P/Urata-Niijima	2.296^I	$3.6\times10^{26}$	4	$1.1\times10^{26}$	1
114P/Wiseman-Skiff	1.569^O	$3.1\times10^{27}$	17	$9.4\times10^{26}$	6	14.1 $\pm$ 2.9

$r_{\rm h}$ : heliocentric distance.
I: inbound or O: outbound on the orbit.
$Q_{H{_2}O}, Q_{\rm d}$ : water and dust production rates.
^*Derived from IUE measurements by Festou et al. (private communication).
$S^\prime [670, 792~{\rm nm}]$ : normalized spectral reflectivity gradient.
L+96: Lamy et al. (1996).
NS85: Newburn & Spinrad (1985).

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