Sun 22/1/11

[sheeny (Al)]

I captured this after Matt's heads up this morning.

The plague in the active region is very bright, I had to drop the exposure from my normal 1/77s to 1/92s to stop it saturating, and processing it is a nightmare... if I keep the detail in the plague,\ the rest of the disc looks frankly dull...

SM40, Ed80, B1200, DMK 41AU02.AS, mosaic of 2 stacks.

I also tried to capture the proms but the clouds were scudding through... I've had a go at processing them but they are being contrary, so I'll have to come back to them. Other things to do...

Al.

[multiweb (Marc)]

Gotta love those full discs. Sharp as. Looks like a big orange.

[Paddy (Patrick)]

Nice detail on the AR, Al. I've just been out sketching the proms - very interesting.

[sheeny (Al)]

Thanks guys.

Oh, it actually doesn't look too bad on my new desktop monitor. It looked much duller on the old laptop.

Al.

[Quark (Trevor)]

Nice work again Al and what a rip snorter prom at about 2:30.

Cheers
Trevor

[sheeny (Al)]

Thanks Trevor. It was a very impressive prom. I did try to cature it with exposure set to best advantage for the prom but the clouds rolled in. I haven't been able to successfully process what little I shot through the clouds... never mind... you get that.

Al.

[astroron (Ron)]

Nice Prom Al, the whole sun looks good too.
Cheers

[jjjnettie (Jeanette)]

Wonderful work Al.

[sheeny (Al)]

Thanks Ron and Jeanette.

Al.

[daveg (Dave)]

Congrats Al youre imaging solar flares! The saturated area is so bright from the amount of energy in the flares so dont be worried about dimming them down. This new area (AR11149) has a complex magnetic structure and is crackling away with flare activity which youve captured. Plage appears in the photoshpere (what we see in white light) and is usually associated with the development of active regions.

Well done again

Dave

[desler]

All the trouble was worth it Al. A very impressive image!


Darren

[Matt Wastell (Matt)]

Hi Al - that is a great disc - not too dull on my screen at all!

[sheeny (Al)]

Thanks guys.

Al.

[Derek Klepp]

Glad you got it Al I got an ok negative of the prominences on the upper right of your disc shot

[Derek Klepp]

Al just had a look at the disc from Big Bear Solar Observatory and your version shows much better detail I,ll have to learn how to do these disc shots would give a good quick perspective using the negative snapshots

[sheeny (Al)]

The key ingredients for the whole disc shots as I do them is the DMK 41AU02.AS or similar size CCD, the ED80 to similar (600mm) FL scope and photoshop to merge 2 images to make the full disk (and of course the Ha filters).

Processing is pretty simple too... the key there is playing in curves to bring out the detail on the disc as well as the proms around the limb... usually means a double humped curve.

Al.

[bartman (Bart)]

Yeah pretty "dull" Al....
" the rest of the disc looks frankly dull...http://www.iceinspace.com.au/forum/..../shrugging.gif"
Just Kiddink!!!!!!
Great Image!!!!
Love the intricacies. I have a poster of the sun with the Shuttle crossing the disc, but not the detail as in your shot. You need to do a shot like that!!!!
It' s difficult I know( traveling to the exact spot on the earth etc) but jeez it would be worth it!
Bartman

[sheeny (Al)]

Thankjs Bart.

I've had one "successful" ISS crossing of the sun: http://www.iceinspace.com.au/forum/s...ad.php?t=63351. I use www.calsky.com to calculate when the ISS will cross the sun or moon for my location. Calsky sends me an email during the week leading up to the event so I can plan for it.

I learned enough from the first crossing to know that I have to significantly reduce my exposure time to capture the ISS (it was blurred at 1/66s), so the plan for the next event is the bump up the gain and reduce the exposure time as much as possible for the ISS pass, and then mask it over a Ha image of the sun taken just before or after.

That's the theory anyway...

Al.

[Shiraz (Ray)]

Really impressive image Al. thanks for posting

[sheeny (Al)]

Thanks Ray.

Al.