HST observation – nucleus “moderately red”

Forums Comets Spectrum of Comet 46P/Wirtanen HST observation – nucleus “moderately red”

Robin Leadbeater

I’ve found this reference for a measurement of the nucleus by the HST 


 The color of the nucleus is moderately red with a gradient of 10% per 1000 Angstroms at optical wavelengths”

which is consistent with my measurement of the reflectance spectrum of the inner region.  This is not proof that we are seeing the nucleus of course but the similarity  is interesting