· Get a Cloudy Nights T-Shirt · Submit a Review / Article    Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy 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] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> Sketching Previous   Index   Next   Threaded   Pages: 1 rodelaet Post Laureate Reged: 04/28/06 Posts: 3063 Loc: 50°56' N - 4°58' E (Belgium) Binocular Icon 12 : The Great Globular in Hercules       #2395119 - 05/14/08 03:26 PM Attachment (40 downloads) Edit   Reply   Quote Quick Reply   The Great Globular in Hercules. One of the finest globular clusters for northern hemisphere observers is undoubtedly M13 in Hercules. With a magnitude of 5.8, the cluster is a naked eye object under mag 6 skies. The cluster is also an easy to find object, even for novice observers. Just draw a line from Eta Herculis to Zeta Herculis and you’ll bump into M13. Just put Eta at the northern edge of the field of view, and M13 will appear centered in your view. Under dark skies, the Globular can be seen without optical aid as a tiny smudge of light. While many globulars have a star like core, M13 appeared to me with a granular core. Its halo is very large compared to other globulars. I could detect a mag 10 star at the western border of the halo. The bright star at the top of the sketch is Eta Herculis. With M13 riding high in the sky, try to compare it with other globulars like M3, M5, M10 and M12. At first, these globulars may all look alike. But with patience, each globular will show slightly different features! Site : Bischofshofen, Austria Date : May 3, 2008 Time : around 22.30UT Binoculars : Bresser 8x56 FOV: 5.9° Filter : none Mount : Trico Machine Sky Window Seeing : 3/5 Transp. : 4/5 Nelm : 6.0 Sketch Orientation : N up, W right. Digital sketch made with Photo Paint, based on a raw pencil sketch. -------------------- Rony My Astronomical Sketches My Binocular Sketches Callibrate your Monitor with this little strip. Edited by rodelaet (05/15/08 03:21 PM) Post Extras:       xfile101 scholastic sledgehammer Reged: 12/08/07 Posts: 759 Loc: Ocean Gate, NJ Re: Binocular Icon 12 : The Great Globular in Herc [Re: rodelaet]       #2397892 - 05/15/08 03:53 PM Edit   Reply   Quote Quick Reply   Man, Rony these binocular sketches of yours keep getting better and better! I'm loving every one and keep looking for the next one in the series. Great work!! -------------------- Orion XT8I Celestron 114EQ Firstscope Meade 70mm Astroscan Post Extras:       mark_h37 member Reged: 04/26/08 Posts: 39 Loc: NPR, FL Re: Binocular Icon 12 : The Great Globular in Herc [Re: xfile101]       #2397906 - 05/15/08 03:56 PM Edit   Reply   Quote Quick Reply   Your sketches are great. After having done a sketch at the telescope and a second one at my binoculars last night, I have to say that I understand your desire to do binocular sketches. -------------------- Mark Binoculars: 11x70 Oberwerk Telescopes: 4" f/13 MCT 8" f/10 Orange Tube SCT Camera: NexImage Post Extras:       atoptics Pooh-Bah Reged: 08/10/06 Posts: 1482 Loc: UK Re: Binocular Icon 12 : The Great Globular in Herc [Re: mark_h37]       #2397930 - 05/15/08 04:02 PM Edit   Reply   Quote Quick Reply   I love that! -------------------- Les Optics Picture of the Day Atmospheric Optics TiltingSun Post Extras:       frank5817 Post Laureate Reged: 06/13/06 Posts: 4082 Loc: Illinois Re: Binocular Icon 12 : The Great Globular in Herc [Re: atoptics]       #2398614 - 05/15/08 09:31 PM Edit   Reply   Quote Quick Reply   Rony, These are so good it is just like observing. The seeing is so perfect on my monitor I detect no star twinkling at all. Pickering 10 conditions--Fantastic. Frank -------------------- my gallery Post Extras:       Special Ed Post Laureate Reged: 05/18/03 Posts: 4276 Loc: Greenbrier Co., WV 38N, 80W Re: Binocular Icon 12 : The Great Globular in Herc [Re: frank5817]       #2398640 - 05/15/08 09:40 PM Edit   Reply   Quote Quick Reply   Rony, I've seen posts about your Binocular Icon series but this is the first sketch I've seen--*very* nicely done! I'm fortunate with my dark skies to be able to see M13 with the unaided eye as you describe and always put my 10x binoculars on it when it is up to get the view you rendered so realistically. Best, -------------------- Michael Rosolina 8" f/10 Orange Tube SCT 4.25" f/4.2 Astroscan Reflector SVP 3.6" f/13.6 CA Reflector 40mm PST f/10 APM Germany HD 15x70 binoculars Canon 12x36 IS II binoculars Mark I Eyeball My CN Gallery Post Extras:       rodelaet Post Laureate Reged: 04/28/06 Posts: 3063 Loc: 50°56' N - 4°58' E (Belgium) Re: Binocular Icon 12 : The Great Globular in Herc [Re: Special Ed]       #2402363 - 05/17/08 05:53 PM Edit   Reply   Quote Quick Reply   Thank you all for your interest in these sketches, and for the kind remarks. These springtime objects are perhaps not that spectacular, they allow me to get prepared for the summer objects. There are some very beautiful summer objects to be observed with a pair of binoculars! -------------------- Rony My Astronomical Sketches My Binocular Sketches Callibrate your Monitor with this little strip. 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