| rodelaet |
| (Post Laureate) |
| 05/14/08 03:26 PM |
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Binocular Icon 12 : The Great Globular in Hercules
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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.
| xfile101 |
| (scholastic sledgehammer) |
| 05/15/08 03:53 PM |
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Re: Binocular Icon 12 : The Great Globular in Herc
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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!!
| mark_h37 |
| (member) |
| 05/15/08 03:56 PM |
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Re: Binocular Icon 12 : The Great Globular in Herc
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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.
| atoptics |
| (Pooh-Bah) |
| 05/15/08 04:02 PM |
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Re: Binocular Icon 12 : The Great Globular in Herc
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I love that!
| frank5817 |
| (Post Laureate) |
| 05/15/08 09:31 PM |
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Re: Binocular Icon 12 : The Great Globular in Herc
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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
| Special Ed |
| (Post Laureate) |
| 05/15/08 09:40 PM |
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Re: Binocular Icon 12 : The Great Globular in Herc
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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,
| rodelaet |
| (Post Laureate) |
| 05/17/08 05:53 PM |
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Re: Binocular Icon 12 : The Great Globular in Herc
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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!