Thursday 11 May 2017

Decaying Plage - 11th May

Quite a difference 24 hours makes on the sun; yesterday 'ex' active region AR12655 was a crackling region of plage showing some reasonable feature, today this area has collapsed and is unidentifiable apart from a bit of plasma sculpted by relict magnetic field lines.  The seeing wasn't as good as yesterday, and the 0.2m Airylab HaT was struggling so I put on the 0.7x Baader solar telecompressor to back off the image scale a bit.  The Double stacked Daystar Quark was used as an etalon, with the PGR Chameleon 3 using 2x2 binning to give 6.9um pixels and 3ms exposure time.