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Uploaded 14-Jul-12
Taken 13-Jul-12
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Dimensions1174 x 1200
Original file size1.38 MB
Image typeJPEG
Color spacesRGB
Date taken13-Jul-12 14:56
Date modified13-Jul-12 19:54
Shooting Conditions

Camera makeCanon
Camera modelCanon EOS REBEL T2i
Exposure1/6 at f/NA
FlashNot fired, compulsory mode
Exposure bias0 EV
Exposure modeManual
Exposure prog.Manual
ISO speedISO 1600
Metering modePattern
Sunspots and prominences on the Sun in Ha

Sunspots and prominences on the Sun in Ha

Date/Time: July 13, 2012 2:55PM PDT

Location: My home, Victoria, BC, Canada

There were several dozen small prominences visible scattered around the Sun's perimeter, and some were spewing plasma into space, however the highlight was the huge sunspot complex AR1520 on the Sun's surface (just above centre in this photo). This sunspot has a delta-class magnetic field which generated an X-class CME towards Earth. Another significant sunspot is 1521 to the right of 1520, which also shows lots of detail.

Equipment: Hutech-modified Canon T2i dSLR a-focal through a 2.5x Powermate, IDAS VLC filter, & Lunt LS60THa + LS50FHa solar telescope mounted on an HEQ5 tracking mount.

Processing:
Adobe Photoshop Elements 10 - Crop, reduce colour depth to 8 bit, apply Sobel method edge detection.
Adobe Lightroom 4 - adjust brightness, annotate