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ghost nebulae around gamma CAS

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#1 yann pothier

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Posted 06 May 2009 - 02:04 AM

Hi,

I am in the process of revisiting some old drawings of mine, making them bigger (30cm rather than <10cm), using new drawing tools (blur pencil) and digital finish (place and form of stars, spikes), a mix of standard drawing and electronic means !

Here after is a final rendition of IC 59 and 63 around Gamma CAS seen through the 17.5" coulter at 74x (Hbeta filter was used for the nebulae).

Posted Image

Below are the same fields seen on DSS2 (wikisky.org) and a scan of the original drawing obtained at the telescope.

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Posted Image


For the Gamma spikes, I used the following tutorial for photoshop :
http://www.iceinspac...30-0-0-1-0.html

clear skies to you, Yann.

#2 Jeremy Perez

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Posted 06 May 2009 - 02:30 AM

Excellent sketch, Yann. It's nice to see the old & new and the photo comparison. Have fun with the rest!

#3 frank5817

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Posted 06 May 2009 - 12:52 PM

Yann,

This is a beautiful sketch; it is so nice to see the comparison between the photon accumulation of a photo versus the instantaneous rendering of the eye at the eyepiece. This is most enlightening for newbie visual observers wanting to do deep sky observing to the limit.:waytogo:

Frank :)

#4 kraterkid

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Posted 06 May 2009 - 12:57 PM

Awesome sketches and comparison Yann! :D

#5 CarlosEH

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Posted 06 May 2009 - 04:36 PM

Yann,

Excellent observation of IC 59 and 63 around Gamma CAS. The nebulae appear ghostly as intended. Thank you for sharing it with us all.

Carlos

#6 rodelaet

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Posted 06 May 2009 - 05:07 PM

Yann,

Excellent contrast between the bright gamma and the subtle nebulosity, really great!

Keep them coming. :cool:

#7 yann pothier

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Posted 07 May 2009 - 01:01 AM

Many thanks for your kind comments, guys !

I will keep posting the most interesting ones.

clear skies, Yann.

#8 JayinUT

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Posted 07 May 2009 - 01:31 AM

Yann,

Outstanding sketch at the scope and I like to see how that transmitted to Photoshop. Nicely done and your details are wonderful.






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