Bokomoko,
There is a photo out there somewhere of an F-18 just as it hits mach 1. There is a vertical 'saucer' of condensation around the radome, and a 'halo' just behind the pilot. I'll try to dig it up as time permits. Doesn't look like the PA D10 has condensation around its radome, rather just looks like a white radome!!
Merry Christmas everyone