Friday, 22 August 2014

An odd return

As suspected, AR12109 returned to the east limb in early August: well -sort of! Only the big red (p) spot survived.  Together with some new siblings, it formed a UNI-POLAR spot group: that is, they were all 'red' polarity spots. Soon some tiny spots of opposite 'sign' joined the 'red brigade'! The one 'survivor' from old 12109 now found itself in following (f) position. A bit like human politics, really! This odd group did not produce any big flares - but was an intriguing anomaly.
The dotted line shows the minor of proper motions of the 'old red giant' (p) spot from 12109, now part of AR12130.