Sunspot group AR 2403 near the solar limb – August 28, 2015

It’s time to say goodbye to sunspot 2403! Tomorrow this large sunspot group will be right on the edge of the visible side of the Sun, and eventually will depart altogether.

I had to get one final image of it, so I drove a few miles from work and got my homemade 200mm F/5 Newtonian out in a corn field at 32 degrees Celsius.

This was the view that I had on the laptop screen (minus the color, added later during processing):

AR 2403 VERTICAL

The above image was published on the first page of SpaceWeather on the same day it was acquired.

The same image was also posted on the EarthSky.org website.

The equipment: 200mm F/5 homemade Newtonian working at F/15, Astrosolar full aperture filter, ASI 120MM-S camera with Baader Red filter. Seeing: 6-7/10.

And the normally orientated views, greyscale and color:

AR 2403 BW

AR 2403 COL

Hope another group like 2403 will be visible on the Sun soon.

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