Sun Images
Unfortunately the Sun is very quiet at the moment (2007) but
here are some images from back when some more interesting things were
happening.
Sunspots 11/09/2005
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Suspot group 10808 was large for this time in
the cycle. It gave rise to several CME's and X class flares and was
the subject of several space weather alerts. Here it has recently appeared
from the eastern limb.
8" LX200 F6.3 Focal Reducer, Solar Filter, IR
blocking filter. Toucam Webcam at prime focus.
4 x 30-second video sequences at 10fps,
1/250sec, gamma 1/3, saturation low . Videos combined, aligned, stacked,
(quality cut-off at 85%) and wavelet filter in Registax3. Final contrast in
PSP.
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Sunspots 25/07/2004
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Unusual for a group this size to appear
at this time in the cycle.
Conditions: high temperature and lots of
atmospheric movement.
8" LX200 F6.3 F10. Solar filter ,
Toucam-Pro webcam, 900 frames at 10fps 1/250sec, gain low, colour manual.
Identical darkframe video also taken. Video capture: K3CCD.
Frames aligned and best 75% stacked in Registax, using darkframe made by
Registax. MaxEnt deconvolution in Astroart. Some histogram adjustment. It
may seem odd to use dark frames with the sun but it helps to remove 'stray'
light and improve contrast when everything is running at 120°C!
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Eclipse 3/10/2005
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Not total here (Portugal) but quite spectacular. Pity there were
no decent sunspots that day! LX200 f/6.3 focal adapter, solar filter,
25mm Helios eyepiece, Canon A75 camera in manual mode through the
eyepiece set at 1/500th F2,8. (image here is 1/4 size). This image taken
at the time of maximum 08:50 GMT. |
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