The Sun and its Spots on 29th April 2005 Home

Move your mouse over the picture to see the numbers of the spot groups.


The Sun on 050429

Sunspot 10756 on 050429 These two images were taken with slightly different exposures.  The upper image has the slightly longer exposure (actually gain at 15% compared to 7% for the lower image).  This has made the lighter parts of the picture relatively less dark but reveals the ring around the biggest spot.  At one time I suspected these rings were processing artifacts, but in this case it is visible (albeit parhaps not quite so sharply) in the raw frames.  The lower image brings out better some of the fainter detail around the main spot.  The small spot to the lower right is not part of group 10757.


Date and Time 29th April 2005 11:42 (top image) and 11:33 and 11:36 UT (lower images)
Camera ToUcam 740K
Telescope 270 mm SLR lens and ETX125 at prime focus
Capture K3CCDTools. Whole Sun: Low gamma, 1/250", 11% gain
                        Spots: Low gamma, 1/250", 7% and 15% gain
Processing Registax. Wavelets 1,2 = 10 (whole Sun), 1-3=10 (spots)
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