Very Short Duration Sunspot? You Tell Me

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Very Short Duration Sunspot? You Tell Me
Taken by Steve Volp on September 21, 2015 @ Northern Wisconsin

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Exposure Time: Unavailable
Aperture: Unavailable
ISO: Unavailable
Date Taken: Unavailable

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Details:

I was taking some test exposures of the sun at various exposures and ISO settings. One exposure caught an extra sunspot, but then it was gone on the next exposure. Is there such a thing or is this my mistake. Sending 4 photos all same Exposure and ISO. Photos were spaced about 8 seconds apart. Abnormality shows up on image ending with 13h48m24s519ms. Please let me know whether my photo actually caught something unusual. Thanks

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The abnormality mentioned above is in the 3rd image from the left. Image time stamps taken from left to right
13:48:40 CDT
13:48:16 CDT
13:48:24 CDT
13:48:32 CDT

CDT to UTC offset -5

Sorry they were uploaded slightly out of order.

Steve Volp

Posted by SMatthew 2015-09-21 18:55:23

I would say it was a gnat or fly, or some other kind of insect.

Posted by Ron 2015-09-22 03:33:11

Mystery solved - sort of. It was a transit of some sort, either satellite or high altitude air craft. This image was taken with a 6 reflector so I think that rules out something near the scope or it would be focused out. Upon closer examination of the next image (last one on right), the same shape is visible in the lower left glow area of the sun. Since the images were 8 seconds apart, it follows that it probably was a transit of an air craft or satellite.

Thanks to all here and elsewhere in solving this mystery for me.

Posted by SMatthew 2015-09-22 11:45:05

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