Search found 916 matches

by Robin Scagell
Thu Aug 30, 2018 9:15 am
Forum: Imaging techniques
Topic: Tutorial on photographing the 'blood moon'
Replies: 0
Views: 1885

Tutorial on photographing the 'blood moon'

The SPA has received the following email: ------------------------ Hey there This is Fred from COOPH (Cooperative of Photography). We make short videos and tutorials about photography. As you’ll know, last month saw the longest lunar eclipse so far of the century. We teamed up with astrophotographer...
by Robin Scagell
Mon Jul 09, 2018 9:48 am
Forum: Observing
Topic: Crescent Moon + star
Replies: 7
Views: 2710

Re: Crescent Moon + star

This thread is called Observing -- and Mike's contributions are precisely in line with its aim! They are in a long tradition of describing not just the scientific facts but also the circumstances. I appreciate that Skyhawk's remarks are not overtly critical or negative, but their tone does imply cri...
by Robin Scagell
Thu Apr 12, 2018 10:03 am
Forum: Forthcoming meetings and events
Topic: Occasional Meetings
Replies: 7
Views: 4030

Re: Occasional Meetings

The subject of non-London meetings crops up a great deal. In 2013 (as Cliff says) we had meetings in Edinburgh, Cardiff, Preston, Belfast and Cambridge in addition to our regular London meetings. I went to the Preston meeting and as Cliff says it was badly attended. But we do want to continue holdin...
by Robin Scagell
Sun Dec 31, 2017 5:35 pm
Forum: General chat
Topic: Planetary nebula NGC 2392 (Eskimo)
Replies: 1
Views: 1745

Re: Planetary nebula NGC 2392 (Eskimo)

I think this is a question that would require the attention of an expert in planetary nebulae! Two come to mind. Prof Raman Prinja: https://www.ucl.ac.uk/star/people/rkprinja.html and Prof Bruce Balick: http://depts.washington.edu/astron/profile/balick-bruce/ Good luck with your research. Robin Scag...
by Robin Scagell
Sat Sep 30, 2017 9:16 pm
Forum: Observing
Topic: Interesting New Comet
Replies: 11
Views: 4535

Re: Interesting New Comet

Good luck -- I think it is more like mag 10 than 5.5, unless it has brightened massively in the past few days.

I took another photo from Kelling Heath using the Atik CCD, which I have posted in the Gallery.
by Robin Scagell
Sat Sep 30, 2017 9:13 pm
Forum: Gallery
Topic: Comet ASASSN
Replies: 4
Views: 3253

Re: Comet ASASSN

2017O1_23_9_07_01.40_RS_lrgb_a.jpg.jpg Here is another photo from Kelling Heath, this time with the Atik 314 L+ camera on the 80 mm refractor on 23 September. I only managed to get seven 1-minute L exposures and three 1-minute triple-binned R, G and B exposures. Mid exposure was 01:40 UT. The two '...
by Robin Scagell
Wed Sep 20, 2017 10:05 pm
Forum: Observing
Topic: Interesting New Comet
Replies: 11
Views: 4535

Re: Interesting New Comet

Just posted an image from Kelling Heath in the Gallery: http://popastro.com/forum/viewtopic.php?f=11&t=20459&sid=37aba45f6f3019ae0c6b671b5b642e9b I'd guess that it's more like mag 10 than mag 8, so not an easy visual object. I didn't try finding it visually as I had the camera attached. Robin
by Robin Scagell
Wed Sep 20, 2017 9:59 pm
Forum: Gallery
Topic: Comet ASASSN
Replies: 4
Views: 3253

Re: Comet ASASSN

IMG_3551-61 crop.jpg This is a crop from a stack of 10 1-minute shots with a Canon 70D through the 80 mm refractor, taken at about 01.40 UT on 20 September from Kelling Heath, Norfolk. The star immediately below the comet is mag 10.4. So it doesn't look as though it will be a binocujlar object just...
by Robin Scagell
Mon Aug 28, 2017 10:02 am
Forum: Observing
Topic: Interesting New Comet
Replies: 11
Views: 4535

Re: Interesting New Comet

I've just posted a photo of the comet on the Gallery, and also on the main SPA news story, which also gives a track and full ephemeris:
http://www.popastro.com/news/newsdetail.php?id_nw=559.
by Robin Scagell
Mon Aug 28, 2017 10:00 am
Forum: Gallery
Topic: Comet ASASSN
Replies: 4
Views: 3253

Comet ASASSN

http://www.popastro.com/images/news/C2017O1_28817_0200_RS%20a.jpg Photo taken on the morning of 28 August, the comet is at centre right. Atik 314L+ CCD camera on a Sky-Watcher 80 mm f/6.7 ED refractor, combining 35 25-second exposures (14½ minutes total) with the stars and comet stacked separately....
by Robin Scagell
Fri Jun 02, 2017 2:59 pm
Forum: Gallery
Topic: Supernova and comet
Replies: 6
Views: 2950

Re: Supernova and comet

Yes, you're right of course! Sorry for the error.

Robin
by Robin Scagell
Sat May 27, 2017 6:03 pm
Forum: Gallery
Topic: NGC 6946 and NGC 6939
Replies: 4
Views: 2467

Re: NGC 6946 and NGC 6939

Thanks, David. High praise indeed from a master!

Robin
by Robin Scagell
Fri May 26, 2017 10:36 am
Forum: Gallery
Topic: NGC 6946 and NGC 6939
Replies: 4
Views: 2467

NGC 6946 and NGC 6939

http://www.popastro.com/images/news/N6946_26517_RS_s.jpg One advantage of a smaller telescope is its wider field of view (51 x 38 minutes). This enabled me to photograph both the galaxy NGC 6946 and the nearby young open cluster NGC 6939. Of course, the cluster is in our own galaxy about 3800 light...
by Robin Scagell
Thu May 25, 2017 3:52 pm
Forum: Gallery
Topic: Supernova and comet
Replies: 6
Views: 2950

Re: Supernova and comet

The 'bright' star above the comet is mag 10.56 and the one to its right is 10.00 according to SkyMap. The faintest stars shown are around mag 15. The FOV is 51 arcsec wide and 38 high, with north more or less at the top. Aligning a CCD camera on the sky is a matter of turning it in the eyepiece moun...
by Robin Scagell
Wed May 24, 2017 9:35 pm
Forum: Gallery
Topic: Supernova and comet
Replies: 6
Views: 2950

Supernova and comet

A couple of photos taken on the night of May 23–24 using my Sky-Watcher 80 mm ED on HEQ5 mount with Atik 314l+ camera from Flackwell Heath, Bucks. http://www.popastro.com/images/news/C2015V2_23517_2342_RS_s1.jpg Comet Johnson. 4 x 30 sec L, 30 sec each R, G and B (bin 2). Not perfect driving! The co...