17 July 11 Sun at 5:40pm

yltansg · Post by **yltansg** » Mon Jul 18, 2011 12:50 am

Sun taken with Borg 76 and Solarscope SF 50 filter at 5:40pm. In this picture, West is pointing upwards. Simply rotate this picture anticlockwise by 90 degree to point North in its right direction. A reference picture can be found at http://spaceweather.com/images2011/17ju ... elic27rdc6.

Sunspots 1250, 1251 and 1254 are clearly visible.[php]

Post by **rcj** » Mon Jul 18, 2011 1:28 am

well done! the processing has been executed just right! colours are great, with lots of details and definition!

Robin Lee · Post by **Robin Lee** » Mon Jul 18, 2011 1:33 am

Where is the LIKE button?

Gary · Post by **Gary** » Mon Jul 18, 2011 1:34 am

Very nice! Thanks for sharing. Embedding your large-size version here:

(Edit: Removed previously embedded image since it is now shown in the original post)

superiorstream · Post by **superiorstream** » Mon Jul 18, 2011 9:12 am

Cant see the image on my com even after login.

yltansg · Post by **yltansg** » Mon Jul 18, 2011 3:31 pm

superiorstream wrote:Cant see the image on my com even after login.

Sorry guys, I still couldn't figure out how to turn on HTML :(

Thanks Gary for embedding the picture.

Alternatively you have visit pbase to see the original size image:

http://www.pbase.com/yltansg/image/136493056/original

The challenge is to have both the prominences and disk details in one image, without having to cheat (i.e. process prominences and disk details in separate picture and put them together).

Enjoy and give me your comments.

Cheers.

Alfred

Post by **Airconvent** » Mon Jul 18, 2011 10:30 pm

Hi
Have extracted the photo's web address and re-inserted for you. Pls do note to avoid losing traffic, some websites will disable embedding.
Great effort , by the way!

yltansg · Post by **yltansg** » Mon Jul 18, 2011 10:55 pm

Thanks

Note: I have seen the embedded images disappear a few times. You can click on URL to see them if they are missing.

1. B/W sun - http://i.pbase.com/g4/08/993808/2/13652 ... F7kx53.jpg
2. Orange Sun - http://i.pbase.com/g4/08/993808/2/13652 ... h3DLbb.jpg
3. Zoom-in view of sunspot 1257 - http://i.pbase.com/g4/08/993808/2/13652 ... H4kitW.jpg

I have added some more pictures taken this evening (18Jul11), just before sunset. This time, a B/W and colour images. First let's get our orientation of the Sun. North is pointing to 3O'clock position. There is a new sunspot 1257 emerging at the 5 O'clock position (i.e. about East position). According to spaceweather.com it poses a growing threat for C-class solar flare. The other thing I am observing is the differential rotation of the Sun (20+ days per revoluation near equator and about 40days per revoluation near poles). Will be monitoring by observing the rate of sunspot movement :)

Now a closer look at 1257. Can you see the prominences on the limb below 1257.

Post by **rcj** » Mon Jul 18, 2011 11:06 pm

Alfred, hope I am not seeing things but even after logging in to see the thread, your latest two images are "question marks"... got to ensure that the URL is between the "img" tags.

superiorstream · Post by **superiorstream** » Tue Jul 19, 2011 7:54 am

Nice photo;good shot.The sun will be more active later as we are at the beginning of the 4th minicycle in sunspot cycle 24.(main cycle).Yours a single stack right? at 0.7A bandwidth?Thanks.