Hi all, 

A fairly active prominence was visible along the south western limb of
the Sun today. Unfortunately, this means it's rotating out of view but
it was fairly dramatic nonetheless.

http://www.digitalsky.org.uk/solar/2008/2008-01-14_13-04-19_Ha_800.jpg

-- 
Pete Lawrence
http://www.digitalsky.org.uk

"Pete Lawrence"  wrote in message 
news:o9sno316kth6l4c1a36vsv90meght1aioq@4ax.com...
> Hi all,
>
> A fairly active prominence was visible along the south western limb of
> the Sun today. Unfortunately, this means it's rotating out of view but
> it was fairly dramatic nonetheless.


http://nsosp.nso.edu/VIDEOIMG/ospan/latest_h.jpg

"Pete Lawrence"  wrote in message 
news:o9sno316kth6l4c1a36vsv90meght1aioq@4ax.com...
> Hi all,
>
> A fairly active prominence was visible along the south western limb of
> the Sun today. Unfortunately, this means it's rotating out of view but
> it was fairly dramatic nonetheless.
>
> http://www.digitalsky.org.uk/solar/2008/2008-01-14_13-04-19_Ha_800.jpg
>

What did you do to get a pic like that from a PST?

Pete Lawrence wrote:
> A fairly active prominence was visible along the south western limb of
> the Sun today. Unfortunately, this means it's rotating out of view but
> it was fairly dramatic nonetheless.

Thanks for the heads up--I'll see if it's still visible tomorrow.

-- 
Brian Tung 
The Astronomy Corner at http://astro.isi.edu/
  Unofficial C5+  Home Page at http://astro.isi.edu/c5plus/
  The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
  My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.html

On Tue, 15 Jan 2008 03:04:42 GMT, "Mk"  wrote:

>
>"Pete Lawrence"  wrote in message 
>news:o9sno316kth6l4c1a36vsv90meght1aioq@4ax.com...
>> Hi all,
>>
>> A fairly active prominence was visible along the south western limb of
>> the Sun today. Unfortunately, this means it's rotating out of view but
>> it was fairly dramatic nonetheless.
>>
>> http://www.digitalsky.org.uk/solar/2008/2008-01-14_13-04-19_Ha_800.jpg
>>
>
>What did you do to get a pic like that from a PST?
>
In the usual way :)

PST + Barlow + planetary camera (Lumenera SKYnyx 2-0M in this case).
For the 3x Barlow shots the extension piece on between the blocking
filter and main body of the PST is removed - something I wouldn't
recommend doing as mine is an old PST and newer versions have an erf
fitted in the extension piece. In order to get around this, a 2.5x
Powermate works in the PST without any issues. Just in case you're
wondering why there would be an issue anyway, the 3x Barlow (in its
original barrel) won't allow the camera to come to focus on a native
PST.

Here's a mosaic compiled from the PST in normal configuration (i.e.
the extension piece left in) using the end of a 2x Barlow screwed into
the nosepiece of the camera...

http://www.digitalsky.org.uk/solar/2008/2008-01-14_12-25-48_Ha_800.jpg

-- 
Pete Lawrence
http://www.digitalsky.org.uk

On Tue, 15 Jan 2008 00:21:36 -0800 (PST), brian@isi.edu (Brian Tung)
wrote:

>Pete Lawrence wrote:
>> A fairly active prominence was visible along the south western limb of
>> the Sun today. Unfortunately, this means it's rotating out of view but
>> it was fairly dramatic nonetheless.
>
>Thanks for the heads up--I'll see if it's still visible tomorrow.

According to one report I read this morning, it's bigger if anything.
The prom was also remarkably visible and intricate in Calcium-K...

http://www.digitalsky.org.uk/solar/2008/2008-01-14_13-13-06_CaK_800.jpg

-- 
Pete Lawrence
http://www.digitalsky.org.uk

Pete Lawrence wrote:
>
> According to one report I read this morning, it's bigger if anything.
> The prom was also remarkably visible and intricate in Calcium-K...
>
> http://www.digitalsky.org.uk/solar/2008/2008-01-14_13-13-06_CaK_800.jpg

Hi Pete,

You truly are a magician when it comes to imaging.  Just simply amazing what 
you're able to capture through a PST.
Your lunar and planetary images are equally spectacular, of course!

Clear Dark Steady Skies,
Dave Jessie

Pete Lawrence wrote:
> According to one report I read this morning, it's bigger if anything.

I took a look today at about 11:40 a.m. PST.  Two major prominences were
visible--a very bright one in the southern half of the preceding limb,
latitude about -30 degrees or so, extending like a branching lightning
bolt about 5 Earth Diameters (ED) up from the chromosphere.  There was
a second, somewhat dimmer one at about the same latitude but in the
northern hemisphere, also on the preceding limb, arching southward across
several degrees of latitude, and reaching to a maximum height of maybe 7
or 8 ED.

My instrument was a Tele Vue Ranger equipped with a 40 mm Solar Max and
a 15 mm eyepiece for about 32x.  The seeing would easily have supported
higher power, but I was a bit short on time, so I didn't bother.

Thanks again to Pete for the heads up.  I had looked some days earlier
and found a largely featureless Sun, so this was a nice change.

-- 
Brian Tung 
The Astronomy Corner at http://astro.isi.edu/
  Unofficial C5+  Home Page at http://astro.isi.edu/c5plus/
  The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
  My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.html