Wednesday, 24 May 2017

AR12658 in Ha - 24th May

This image of this small active region reveals the photospheric ghost of the sunspot that was once prominent.  The seeing wasn't great and passing haze bands meant that an animation wasn't possible, which was a shame as at this scale there was plenty going on.  Taken with the 203mm Airylab HaT at ~4250mm focal length, using the 0.7x Baader solar telecompressor and the PGR Chameleon 3 camera using 2x2 binning to freeze the seeing by means of a shorter exposure time.