Sunspot groups 2415 and 2418 – September 20, 2015

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Another superb Summer-like day. And another solar imaging session, this time together with my wife.

The telescope chosen for this session was the 8inch F/5 homemade Newtonian (SkyWatcher optics) with Astrosolar full-aperture filter, ASI120MM-S camera and Red filter. The seeing was good for a brief minutes, time in which I could get images for only one of the visible sunspot groups. This was again (like in the previous post) AR 2418,  a solitary crosser of the Sun.

ar 2418 col

ar 2418 bw

A few minutes later, the seeing degraded quite a bit, and it remained like that for an hour until we’ve decided to leave.

Still, one series was acquired of the very active group AR2415, closing in to the solar limb.

2415 b

2415 a

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