February 18, 2018 on 10:00 am | In Sun | Comments Off

The Sun 2018-02-18.  AR2699 came to an end yesterday so today we are registering spotless day 159. However, the Sun is not completely featureless.  A small filament is visible in the SW quadrant.  Today full disk images and a close up of the filament in Ha.

2018-02-18-1501_3-TR-540nm.jpg 2018-02-18-1508_8-TR-Ha-4.jpg 2018-02-18-1515_8-TR-CaK-1.jpg

2018-02-18-1512_0-TR-Ha-SWFilam.jpg

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