Observing Report 13th January 2013 (Big sunspot group)

Posted by @ 7:55 pm on Sunday 13th January, 2013.

This was the first observing session of the year, primarily because it's been the first time we've had clear skies. Prominent in the image is Active Region 1654. This is a huge group of sunspots, currently about 180,000 km from end to end - that's about 14 Earth-diameters, or, in proper units, about 657 x the length of Wales.

Mouseover the image to see how tiny the Earth would look next to these things, and click the image to see it thrice bigger:


Active Region 1654 (13/01/2013)

3000 stacked frames, DMK mono CCD camera at prime focus on the C80ED-R, Baader Planetarium AstroSolar™ Safety Film (ND 3.8) with #58 Green and IR-cut filters

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