Thursday, September 29, 2011

Solar Sketches 9-29

Today is the first day of Rosh Hashana, the Jewish New Year-  To everyone reading, I wish you a happy and healthy year!  Being that I am off work, I set up the solar scopes today and made some afternoon sketches of the sun.  I am quite pleased that the weather has changed enough to allow for 2 PM sketching.  Only a couple weeks ago, I would have been overcooked by the time I placed pencil to paper.  Not so today.  While the temps are in the mid 90's, it actually feels nice out.  Maybe I am truly turning into a desert rat?

The sketches below were made at the times reflected in the captions, and the images from the Solar Dynamics Observatory also have the time of capture below them.  It is worth mentioning that neither my white light sketch, or the SDO white light image contain the detail and number of spots that were visible in AR 11302.  I would estimate that that region alone contains in the neighborhood of 50 spots.  It is interesting that while there are a half-dozen numbered active regions on the face of the sun, all of them are in the northern hemisphere.

Click to enlarge

2100 UT

2045 UT

2138 UT

2000 UT

Finally, the Mount Wilson Observatory in California has a 150 ft. Solar Tower from which they create a daily sunspot drawing.  Not too many professional observatories create sketches, and below is today's sketch:

Click to enlarge

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