Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: Roberto on May 26, 2020, 10:22:39

Title: Sun Ha - Nice prominence 25 May 2020
Post by: Roberto on May 26, 2020, 10:22:39
Hello All

Hope you are all keeping well.   Only managed to get some time to do some solar observing yesterday morning and took the attached of the beautiful quiescent prominence that has been hanging on the NW limb of the Sun over the weekend.

Details of equipment and processing here:  https://www.astrobin.com/r5xowy/B/?nc=user (https://www.astrobin.com/r5xowy/B/?nc=user)

Roberto

(https://cdn.astrobin.com/thumbs/1ZRb_QOJMx7__1824x0_0WLB6cRc.jpg)
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: Carole on May 26, 2020, 11:00:24
Very nice Roberto

Carole
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: Roy on May 26, 2020, 15:24:33
Simply beautiful Roberto.

Roy
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: Roberto on May 26, 2020, 17:51:58
Thank you Carole, Roy. Our Sun is getting more and more active. Hopefully it will be sunny over the summer to capture more of its activity.

Roberto
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: ApophisAstros on May 26, 2020, 20:33:11
Still working on close ups myself , i have put an autofocuser on my solar scope so thats easier without moving the scope when focusing,your image is really good.
Roger
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: Roberto on May 27, 2020, 11:53:59
Thank you Roger.   A good focuser helps.  I would say that the biggest factor is seeing.  If I don't do my imaging early morning, the seeing has gone and I don't get any detail.  This image was already quite late 10:30AM but my observatory had been opened all night and was still cool when I rolled the roof open again.

Roberto
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: ApophisAstros on May 27, 2020, 13:31:18
Quote from: Roberto on May 27, 2020, 11:53:59
Thank you Roger.   A good focuser helps.  I would say that the biggest factor is seeing.  If I don't do my imaging early morning, the seeing has gone and I don't get any detail.  This image was already quite late 10:30AM but my observatory had been opened all night and was still cool when I rolled the roof open again.

Roberto
I would have thought seeing was best when the Sun is above you at mid-day as its the smallest part of the armosphere?
Roger
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: Roberto on May 27, 2020, 17:16:11
No; the earlier the better when the atmosphere is at its quietest.   My best images in the last solar cycle were just after the 7/8AM in the summer when the Sun was high enough to see above horizon trees.  Some people also image late in the afternoon as the temperature settles but although high altitude helps in terms of ability to catch the Sun from almost anywhere, you have to deal with much more currents note least inside your optical tube!  Many solar imagers keep their scopes shielded from all solar light until they actually take pictures.

Roberto
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: ApophisAstros on May 27, 2020, 17:22:34
Look forward to early morning opportunities,
Roger
Title: Re: Sun Ha - Nice prominence 25 May 2020
Post by: MarkS on May 27, 2020, 20:47:41
Excellent result!

Compared to the Earth it just shows how huge those prominences are.

Mark