· 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 rodelaet Post Laureate Reged: 04/28/06 Loc: 50°56' N - 4°58' E (Belgium) NGC 2403 in Cam, with a 4 inch refractor.       #3086882 - 05/05/09 03:55 PM Attachment (57 downloads) Edit   Reply   Quote Quick Reply   NGC 2403 in Camelopardalis is one of Messier’s missed objects. It may sound strange at first, but this galaxy is a member of the M81 Group of galaxies. Its distance to the M81/M82 duo is about 3 million l-y, comparable with the distance between our galaxy and M31. Its distance to our galaxy is about 10 million l-y. With a mag of 8.5, NGC 2403 is almost as bright as M82. But NGC 2403 appears much larger and has a lower surface brightness (14,6 compared to 12.8 for M82). NGC 2403 can be found from different starting points. Here follows my approach for low power instruments: draw an imaginary line from Capella to Polaris. Both stars are roughly 45° apart. Then find the midpoint of that line. From that point, draw a line (the bisector) perpendicular to the first line, for about 15° in the direction of the Bear’s nose (Omicron Ursae Majoris) until you run into NGC 2403. The low power view (at x17) reminds me of the glow of a partially resolved open cluster. Two 10th mag foreground stars lie embedded in the halo of the galaxy, one on each side of the diffuse core. The stars only show up with averted vision. At x62, the galaxy appears elongated in a SSW to ENE direction. Another 11th mag foreground star appears just a few minutes away from the core of the galaxy. The three embedded stars, albeit not particular bright, interfere with the subtle glow of the distant galaxy, as if the galaxy tries to hide its appearance behind the foreground stars. Site : Bekkevoort, Belgium ( 51° N ) Date : April 19, 2009 Time : around 21.00 UT Scope : Skywatcher 102/500mm achromatic refractor Eyepiece : Baader Hyperion Zoom at 8mm Magnification : 63x FOV: 65’ Filter : none Seeing : 3/5 Transp. : 4/5 Sky brightness : 19.70 magnitudes per square arc second near zenith (SQM reading). Nelm: 5.4 Sketch Orientation: N up, W right. Digital sketch made with Corel Paint Shop Pro X2, based on a raw pencil sketch. Post Extras:       kraterkid Post Laureate Reged: 03/07/05 Loc: Jacumba, California Re: NGC 2403 in Cam, with a 4 inch refractor. [Re: rodelaet]       #3087156 - 05/05/09 06:59 PM Edit   Reply   Quote Quick Reply   Rony, Absolutely gorgeous my friend! NGC 2403 appears so distant compared to the sparse foreground stars of the Milky Way. Wonderful detail, remarkable view and all this with such a modest aperature! You are the definition of an observer and an artist. Post Extras:       cildarith Carpal Tunnel Reged: 08/26/04 Loc: San Diego, CA Re: NGC 2403 in Cam, with a 4 inch refractor. [Re: kraterkid]       #3087190 - 05/05/09 07:29 PM Edit   Reply   Quote Quick Reply   Excellent rendition, Rony! Post Extras:       rolandlinda3 Post Laureate Reged: 01/24/06 Loc: Crozet VA 22932 Re: NGC 2403 in Cam, with a 4 inch refractor. [Re: rodelaet]       #3087384 - 05/05/09 09:17 PM Edit   Reply   Quote Quick Reply   Delightful sketch, Rony. Roland Post Extras:       frank5817 Postmaster Reged: 06/13/06 Loc: Illinois Re: NGC 2403 in Cam, with a 4 inch refractor. [Re: rolandlinda3]       #3087707 - 05/06/09 12:18 AM Edit   Reply   Quote Quick Reply   Rony, This is a beautiful sketch of a wonderful galaxy. I have trouble with this one because of the Chicago light glow. Frank Post Extras:       yann pothier member Reged: 10/16/07 Loc: Paris, France Re: NGC 2403 in Cam, with a 4 inch refractor. [Re: frank5817]       #3087852 - 05/06/09 02:54 AM Edit   Reply   Quote Quick Reply   very nice sketch Rony, as usual ! Post Extras:       Achernar Postmaster Reged: 02/25/06 Loc: Mobile, Alabama, USA Re: NGC 2403 in Cam, with a 4 inch refractor. [Re: rodelaet]       #3088781 - 05/06/09 03:51 PM Edit   Reply   Quote Quick Reply   Nice drawing of this under-rated galaxy. NGC-2403 is every bit as bright as many of the Messier galaxies, and yet it's not as well known as it should be. This is how it looks through my 6-inch on typical nights in my area. Well done! Taras Post Extras:       CarlosEH Postmaster Reged: 01/19/05 Loc: Pembroke Pines, Broward County... Re: NGC 2403 in Cam, with a 4 inch refractor. [Re: Achernar]       #3089205 - 05/06/09 07:49 PM Edit   Reply   Quote Quick Reply   Rony, An excellent observation and report of this interesting edge-on galaxy in Camelopardalis. You have captured it very nicely. Thank you for sharing it with us all. Links; http://www.hawastsoc.org/deepsky/maps/cam/cam2.gif http://apod.nasa.gov/apod/ap060705.html Carlos Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 1 registered and 10 anonymous users are browsing this forum. 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