Table 4: Best fit parameters (and corresponding uncertainties) of our simple model consisting in a Gaussian elliptical envelope superimposed on a uniform ellipse representing the central star. The fit was computed on our complete H and K band data set.
$\theta_{\rm eq}$ $2.13 \pm 0.05$ mas stellar equatorial angular size

$\theta_{\rm pol}$ $1.51 \pm 0.02$ mas stellar polar angular size

$\alpha_1$ $131.6 \pm 1.4$ deg azimuth of the stellar equator

$\rho_{\rm eq}$ $2.7 \pm 1.3$ mas envelope FWHM along stellar equator

$\rho_{\rm pol}$ $17.6 \pm 4.9$ mas envelope FWHM along stellar pole

f $4.7 \pm 0.3$ % relative (envelope to star) near-IR flux

**Table 4:** Best fit parameters (and corresponding uncertainties) of our simple model consisting in a Gaussian elliptical envelope superimposed on a uniform ellipse representing the central star. The fit was computed on our complete H and K band data set.
$\theta_{\rm eq}$	$2.13 \pm 0.05$ mas	stellar equatorial angular size
$\theta_{\rm pol}$	$1.51 \pm 0.02$ mas	stellar polar angular size
$\alpha_1$	$131.6 \pm 1.4$ deg	azimuth of the stellar equator
$\rho_{\rm eq}$	$2.7 \pm 1.3$ mas	envelope FWHM along stellar equator
$\rho_{\rm pol}$	$17.6 \pm 4.9$ mas	envelope FWHM along stellar pole
f	$4.7 \pm 0.3$ %	relative (envelope to star) near-IR flux

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