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(click on images to enlarge)
7.30.12 Four frames across solar disk:
9.29.12 Mosaic in Ha:
2012 Venus Solar transit:
Annular Eclipse on 5.20.2012:
April 13, 2012 Large Solar flare. Moving at +750,000 MPH:
August 5, 2012 Large filament:
Filaments and prominences take on a 3D look with this angle:
July 2, 2012 CME and AR51515:
July 14, 2012 C1 flare in AR11087:
July 26, 2012 prominence:
May 4, 2011 Mosaic:
May 31, 2012 Mosaic:
Proms and filiproms inverted:
-John Minnerath
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John,
I'm really curious about two of these images: the 5/20/12 Annular Eclipse & the 7/14/12 C1 flare in AR11087. Would you care to explain to this rank amateur solar gazer what I'm actually looking at in these two? Thanks.
Posted by: Maureen Lang | January 13, 2013 at 10:50 AM
Maureen,
An annular Solar eclipse occurs when because of position the Moon's shadow is smaller than the diameter of the Sun. In our unique Solar System both disks appear the same size, with some variation between perigee and apogee.
That photo was taken with just a large telephoto lens with a WL filter on it and the camera on a tripod out in the yard.
It was a very cloudy day as can be seen, but it did add a cool effect to an otherwise pretty uninspiring photo. One of the larger Sunspots that day can also be seen.
That picture was about the maximum eclips for me because of where I was in relation to the eclipse track.
For the next upcoming total eclipse, dead center of the track will be in a meadow about 1/4 mile from me. I'll have 100% totality for several minutes.
I can't wait!
Solar flares are classed according to their brightness in x-ray wave length. C being at the low end of the scale.
That sequence I took was when that Active Region was quite busy flaring.
These flares can happen rapidly, The entire sequence only lasted about 20 minutes.
Flares are really cool when made into an animation, but I've never managed to master the technique.
Posted by: John Minnerath | January 13, 2013 at 12:08 PM
Thanks for the comprehensive explanations, John. As far as animating the flare sequence, I wish I had the knowledge to help out- perhaps another astrophotog commenter.....paging Cieran, Cieran?
Posted by: Maureen Lang | January 13, 2013 at 01:34 PM
Here's an example of a prominence animation.
Andy makes some great ones.
If I ever get to where I can see well enough again I have to spend some time getting one done.
Mine so far end up too jerky. :)
http://solarchat.solarastronomy.org/index.php/en/this-is-solar-chat/6-this-is-solarchat-/54717-5-january-2012-ne-limb-activity-movie-reworked
Posted by: John Minnerath | January 13, 2013 at 01:54 PM
Thanks for the link- really good animation of that loop. BTW, is solarchat.solarastronomy.org the forum that you moderate?
Posted by: Maureen Lang | January 13, 2013 at 02:33 PM
No, I'm just a member. Stephen Ramsden has done a great job there of bringing together Solar imagers and observers.
I'm one of the moderators here,
http://www.telescopejunkies.com/
a small general interest amateur astronomy forum.
Posted by: John Minnerath | January 13, 2013 at 05:42 PM