· Get a Cloudy Nights T-Shirt · Submit a Review / Article Click here if you are having trouble logging into the forums Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> Sketching Previous   Index   Next   Threaded   Pages: 1 | 2 | (show all) JeanB scholastic sledgehammer Reged: 07/11/11 Loc: Montreal, Canada Moon dog       #5609996 - 01/07/13 11:21 AM Attachment (46 downloads) Edit   Reply   Quote Quick Reply   Hi everyone, it has been a while since I posted a sketch here. I have been very busy and had to neglect my hobby. However, I came to see the sketches from you guys from time to time. In december I spent some time in Cuba. And I had the chance to see for the first time a ring around the moon (moon dog). It was spectacular. The ring is a perfect 22 degrees circle. On the 27th Jupiter was also included in the ring. I decided to sktech the view on my note pad and work on it with pastels and GIMP software back home. here is the result. Jean Edited by JeanB (01/07/13 11:22 AM) Post Extras:       niteskystargazer Carpal Tunnel Reged: 10/05/09 Loc: 41-43'-28" N 87-42'-39" W Re: Moon dog [Re: JeanB]       #5610008 - 01/07/13 11:26 AM Edit   Reply   Quote Quick Reply   Jean, Very good sketch of the Moon Dog . CS,KLU, , Tom Post Extras:       Aquarellia sage Reged: 10/27/12 Loc: Val d'Issole, Provence, France Re: Moon dog [Re: niteskystargazer]       #5610081 - 01/07/13 12:04 PM Edit   Reply   Quote Quick Reply   Whaw Jean, that's art for which you have to buy a frame... That's really a nice pastel, thank you for sharing Michel Post Extras:       Andrev Carpal Tunnel Reged: 02/08/11 Loc: Montreal, Quebec, Canada Re: Moon dog [Re: Aquarellia]       #5610116 - 01/07/13 12:20 PM Edit   Reply   Quote Quick Reply   Michel. I told exactly the same to Jean ehehehe. Andre. Post Extras:       Ed D Carpal Tunnel Reged: 04/30/10 Loc: Sunny South Florida Re: Moon dog [Re: Andrev]       #5610982 - 01/07/13 09:51 PM Edit   Reply   Quote Quick Reply   Jean, that's a really nice sketch. You captured it well. We get moon dogs every so often down here in Miami. BTW, you were in the small city/province where I was born many moons ago. Ed D Edited by Ed D (01/07/13 09:52 PM) Post Extras:       maroubra_boy sage Reged: 09/08/09 Loc: Sydney, Australia Re: Moon dog [Re: Ed D]       #5611008 - 01/07/13 10:07 PM Edit   Reply   Quote Quick Reply   Lovely work, mate! There's a certain refreshing quality to this piece, Jean. I've found myself lingering over it... Alex. Post Extras:       frank5817 Postmaster Reged: 06/13/06 Loc: Illinois Re: Moon dog [Re: maroubra_boy]       #5611093 - 01/07/13 10:49 PM Edit   Reply   Quote Quick Reply   Jean, I love it. It has a real tropical look to it too. Frank Post Extras:       drbyyz sage Reged: 11/04/12 Loc: Summerville, SC Re: Moon dog [Re: frank5817]       #5611179 - 01/07/13 11:47 PM Edit   Reply   Quote Quick Reply   Awesome sketch! The trees make it special, gives it some extra personal touch that brings me into your experience. Love it. Saw one of these a week or two ago and tried to snap a shot with the iPhone since I didn't have anything else on me, but it didn't work out too well. Post Extras:       JeanB scholastic sledgehammer Reged: 07/11/11 Loc: Montreal, Canada Re: Moon dog [Re: drbyyz]       #5611553 - 01/08/13 09:10 AM Edit   Reply   Quote Quick Reply   Thank you guys! Your comments are much appreciated. If I understand correctly, this phenomenon is common in the south part of the world. Interesting. I was also impressed to read that this ring is due to tiny hexagonal ice crystals in the cirrus in altitude and that we may see a second ring of 46 degrees when condition are perfect. Well you south-friends should try to sketch that one of these nights to show us north-fellows what it looks like. Jean Post Extras:       Chopin Canis Insanus Reged: 02/03/05 Loc: In the doghouse. Re: Moon dog [Re: JeanB]       #5611575 - 01/08/13 09:22 AM Edit   Reply   Quote Quick Reply   Jean, a spectacular illustration. I agree that the tree gives a nice touch. Post Extras:       Jef De Wit Carpal Tunnel Reged: 03/06/09 Loc: Hove, Belgium Re: Moon dog [Re: Chopin]       #5613293 - 01/09/13 08:38 AM Edit   Reply   Quote Quick Reply   I like it! Post Extras:       PeterDob professor emeritus Reged: 07/29/05 Loc: Carù, Italy Re: Moon dog [Re: Jef De Wit]       #5613344 - 01/09/13 09:10 AM Edit   Reply   Quote Quick Reply   Really beautiful, Jean! Peter Post Extras:       JeanB scholastic sledgehammer Reged: 07/11/11 Loc: Montreal, Canada Re: Moon dog [Re: PeterDob]       #5617379 - 01/11/13 02:37 PM Edit   Reply   Quote Quick Reply   Jason, jef, Peter, thanks guys for your comments! Jean Post Extras:       JimPie sage Reged: 11/10/07 Loc: S.E.Michigan Re: Moon dog [Re: JeanB]       #5620833 - 01/13/13 01:50 PM Edit   Reply   Quote Quick Reply   Wonderful sketch. What cool phenomenon. Post Extras:       GlennLeDrew Postmaster Reged: 06/18/08 Loc: Ottawa, Ontario, Canada Re: Moon dog [Re: JimPie]       #5634362 - 01/21/13 05:42 AM Edit   Reply   Quote Quick Reply   Very evocative; the palm really provides an interesting perspective. I like it! A couple points of fact: A Moon (or Sun) dog would be a somewhat horizontally elongated brightening at the radius of the halo, at the same altitude as the Moon, and where the parhelic circle intersects the 22 degree halo. They occur when the Moon (Sun) is not too high in the sky. What you observed here is just the 22 degree radius halo. There is not necessarily a preponderance of parhelia in southern latitudes; they occur worldwide, whenever cirrostratus cloud or suitable low level ice crystals in cold airmasses occur. Given the 22 degree radius, or 44 degree diameter of the halo, it's apparent that at this scale the 1/2 degree Moon, which is a mere 1/88 the halo's size, should be rendered as much smaller. Actually close to the size of the dot representing Jupiter. The impression imparted here, for anyone who may not have seen a halo, is that the halo is quite a bit smaller than it really is. Post Extras:       Special Ed Postmaster Reged: 05/18/03 Loc: Greenbrier Co., WV 38N, 80W Re: Moon dog [Re: GlennLeDrew]       #5634663 - 01/21/13 10:31 AM Edit   Reply   Quote Quick Reply   Jean, You made a lovely impression of the lunar halo from a tropical setting. Glenn is correct about the nomenclature and size of the halo. You can learn a lot more about this and other atmospheric phenomena at Les Cowley's website. The old timers called this a "ring around the Moon" and said that the number of stars one could count inside the ring foretold how many days it would be before rain. This had some basis in fact because the more water vapor was present in the atmosphere, the fewer stars one would see. Post Extras:       JeanB scholastic sledgehammer Reged: 07/11/11 Loc: Montreal, Canada Re: Moon dog [Re: Special Ed]       #5634684 - 01/21/13 10:41 AM Edit   Reply   Quote Quick Reply   Many thanks Glen and Michael, I guess it was not easy for me to reproduce the correct proportions on this sketch,but you are right: the ring should have been larger. Jean Post Extras:       JeanB scholastic sledgehammer Reged: 07/11/11 Loc: Montreal, Canada Re: Moon dog [Re: JeanB]       #5634735 - 01/21/13 11:11 AM Attachment (2 downloads) Edit   Reply   Quote Quick Reply   On the other hand, I checked at some ring around the moon pictures on the web, and the proportion look close to what I have sketched. Any explanation? Even if I take into account the effect of the brightness of the moon on its apparent size it looks as if the proportion are skewed. I am right? http://en.wikipedia.org/wiki/File:Moon_ring_around_the_moon.JPG Post Extras:       Gregen member Reged: 11/25/12 Loc: CA Re: Moon dog [Re: JeanB]       #5635192 - 01/21/13 03:20 PM Edit   Reply   Quote Quick Reply   Beautiful sketches! Post Extras:       mike73 member Reged: 05/01/12 Loc: UK Plymouth Re: Moon dog [Re: Gregen]       #5635279 - 01/21/13 04:12 PM Edit   Reply   Quote Quick Reply   Hey Jean Cuba's a great place isnt it? I saw a moon dog from the UK last Febuary, I thought my eyes were playing up at first but we definately had a moon dog a couple nights in a row. Its a lovely sketch and as others have said the trees in the foreground really add to the picture. Post Extras:       Pages: 1 | 2 | (show all) Previous   Index   Next   Threaded   Extra information 3 registered and 9 anonymous users are browsing this forum. 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