An analysis of outgassing pressure forces on the Rosetta orbiter using realistic 3D+t coma simulations

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Table 1:

Comet 67P model parameters.
Shape	Lamy et al. 2007 Resolution: 3⁰ ( $\simeq$ 30 m.)
Mean nucleus radius	$r_{\rm c}\equiv{}$ 2 km
Rotation mode	uniform, retrograde, fixed-axis OZ
Rotation period	12.55 h
Subsolar point	+20⁰ from equatorial plane $^\dagger$
Visible albedo	A_V =0.052
IR emissivity	$\epsilon = 0.9$
Heliocentric distance	r_h = 3 AU
Internal heat flux (shadow)	$F_s = 0.05 c_\odot/r_h^2$
$\rm H_2O$ production	solar-driven sublimation with uniform f=0.07
Computed $\rm H_2O$ production	$Q = (4.75 {-} 7.06) \times 10^{26}$ molec/s
$\rm CO$ production	surface diffusion (non-uniform, A₀ = 0.2 )
Computed $\rm CO$ production	$Q = (1.05 {-} 1.08) \times 10^{27}$ molec/s

Notes. The symbol $c_\odot$ denotes the solar constant, and f is the surface icy area fraction. $\dagger$ This angle is the 2006 value and may be different during the 2014 rendez-vous.

Source LaTeX | All tables | In the text

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