Post by brianb on Feb 28, 2010 23:21:30 GMT
Another month finished, and another day with solar observation possible! Conditions were tolerable rather than good, high cloud spoiled the view of what may have been a spectacular prominence given good transparency.
Solar disc activity continues to run down, AR1050 is now almost defunct and AR1051 appears to be in decline, with only a single smallish spot seen visually in white light. The calcium disk image shows little other activity.
2010 Feb 28, 1128 UT. Coronado PST CaK, prime focus (f/10), DMK41.
Three-colour view of AR1051:
2010 Feb 28, 1308 UT. Solarscope 60, x2 barlow (f/16), DMK21.
2010 Feb 28, 1147 UT. 80mm, x2 & x3 barlows (f/36), Baader ND5.0 solar film & solar continuum filter, DMK21.
2010 Feb 28, 1334 UT. 60mm, Lunt B1200 CaK diagonal, x3 barlow (f/25), DMK21.
Multiple prominences are shown on the Ha disc composite:
2010 Feb 28, 1256 UT. Solarscope 60, Atik x0.5 focal reducer (f/5), DMK41.
Note particularly the enormous but very diffuse prominence around the north pole. I tried to image this in close up but got problems ... nasty join & Newtons' Rings :crazy:
2010 Feb 28, 1324 UT. Solarscope 60, x2 barlow (f/16), DMK21.
Efforts at imaging the other major prominence groupls on show were rather more successful!
2010 Feb 28, 1318 UT. Solarscope 60, x2 barlow (f/16), DMK21.
2010 Feb 28, 1311 UT. Solarscope 60, x2 barlow (f/16), DMK21.
2010 Feb 28, 1317 UT. Solarscope 60, x2 barlow (f/16), DMK21.
Transparency variable, fair to poor, with continuous thin milky cirrus cloud & intermitent drifting low cloud. Seeing variable, mostly poor but with some reasonably good intervals. Temp 7C, wind SE force 3.
Solar disc activity continues to run down, AR1050 is now almost defunct and AR1051 appears to be in decline, with only a single smallish spot seen visually in white light. The calcium disk image shows little other activity.
2010 Feb 28, 1128 UT. Coronado PST CaK, prime focus (f/10), DMK41.
Three-colour view of AR1051:
2010 Feb 28, 1308 UT. Solarscope 60, x2 barlow (f/16), DMK21.
2010 Feb 28, 1147 UT. 80mm, x2 & x3 barlows (f/36), Baader ND5.0 solar film & solar continuum filter, DMK21.
2010 Feb 28, 1334 UT. 60mm, Lunt B1200 CaK diagonal, x3 barlow (f/25), DMK21.
Multiple prominences are shown on the Ha disc composite:
2010 Feb 28, 1256 UT. Solarscope 60, Atik x0.5 focal reducer (f/5), DMK41.
Note particularly the enormous but very diffuse prominence around the north pole. I tried to image this in close up but got problems ... nasty join & Newtons' Rings :crazy:
2010 Feb 28, 1324 UT. Solarscope 60, x2 barlow (f/16), DMK21.
Efforts at imaging the other major prominence groupls on show were rather more successful!
2010 Feb 28, 1318 UT. Solarscope 60, x2 barlow (f/16), DMK21.
2010 Feb 28, 1311 UT. Solarscope 60, x2 barlow (f/16), DMK21.
2010 Feb 28, 1317 UT. Solarscope 60, x2 barlow (f/16), DMK21.
Transparency variable, fair to poor, with continuous thin milky cirrus cloud & intermitent drifting low cloud. Seeing variable, mostly poor but with some reasonably good intervals. Temp 7C, wind SE force 3.