Sunday, 15 July 2018

Second Rotation for Ex Active Region - AR12713 - 15th July

Currently spotless and un-named as an active region, this bipolar patch of plage on the suns disk is the remains of active region which was heading towards the western limb of the sun on the 21st June.  Then it had a number of sunspots and dark filaments associated with it, whereas now it is much quieter and calmer.  It may well see a third rotation, but by then is likely nothing but a small patch of plage visible in Calcium wavelengths.  Taken with a Lunt50 etalon, Daystar Quark and an IMX249 chipped PGR camera.