New sunspot group 5/7, updated 5/12

A new group of sunspots appeared on the sun's northwestern limb. This hydrogen-alpha shot was made with a Lunt 60 single-stacked (0.7 A bandpass) scope and Celestron Skyris 445 monochrome camera.

I took another H-alpha image on 5/11, this time making a full-disk composite, one frame exposed for the prominences and another for the disk. I used a Photoshop technique described by Paul Hyndman. The sunspots had rotated more to the center of the solar disk. Same equipment but with a 0.7x focal reducer to get the full disk on the chip.


Here's a close-up of the sunspot group with the scope double-stacked (0.5A bandpass).