Jellyfish widefield

[RobertM]

Need a few more subs for this really but not much doing with the weather !!!

IC443, otherwise known as the Jellyfish nebula, is a supernova remnant in the constellation of Gemini.  Also in this image are IC 444 slightly to the north west and NGC2174/5 (known as the monkey head nebula to some) in the South East.  North is up and West is left.



Capture details:

Exposure: 15 x 10min
Filter: Baader Ha 6nm passband
Camera: Finger Lakes ML 8300
Optics: Canon 200L lens@f/3.2
Conditions: Clearish but nearly full moon present.
Date: 27/12/2009
Guiding: 50mm finder + SXV-H9

Full size: http://farm3.static.flickr.com/2695/4257761306_d0bf3d1aba_o.jpg

[MarkS]

For a moonlit night, that's an excellent result.  I'm definitely looking forward to some dark-site images.

It's a very good field of view, but aesthetically I prefer the composition cropped with the monkey head taken out - the image then appears more balanced.  Try it and see what you think.

Mark

[JohnP]

Looks superb to me.... I like the FOV as it is.... Good seeing the relative brightness of all th DSO's.. What is the small cloud bottom right of Jellyfish (above monkey head if that is what it is called).. Why are some of the diffraction spikes around stars a lot wider than some of the others.. Is this just to do with brightness of star???

Great Shot.

John.


PS - Out of interest is this the image you had 'trailing' issues with...

[RobertM]

Mark, I had the lens on and getting NGC2174 (monkey thingie) in the same shot was a bonus.  It might have been better to frame in the M35 cluster instead which would have placed the Jellyfish more centrally but that's what I decided on the day.  I always try to frame as much as possible because imaging time is so precious.

John, That small cloud of nebulosity is Sh2-247 according to Maxim.  The diffraction spikes at much larger on those two brighter stars (assuming you mean those) because they're 3 magnitudes brighter than any other star in the image (on the left Mu Gemini Mag. 2.9 and right Eta Gemini Mag 3.3 most others are Mag. 6).   The trailing star problem was on this image but don't look too closely as I only roughly processed it : http://farm3.static.flickr.com/2721/4256890619_e67f55e54c_b.jpg

[Fay]

Wonderful Robert, you are really getting a lot of these great images!

[Rocket Pooch]

Hi,

I really like that Robert, I think the background is a little less black but its a great shot.  Can't wait to get my 165mm F2.4  lens running with the OAG (all parts on order).

Hey another thing, the diffraction spikes on the brighter stars really set the image off well, and because they are not post aquisition they are doubly special.

Chris

[Tony G]

Great image Robert, love the FOV.
I wasn't aware the other object like JohnP was refered to as 'The Monkey Head' but once you look at it, it seems quite obvious, but also I asked Flis could she see it which she did eventually, but made another observation, that the 'Jellyfish' looked very much like 'The Churchill Dog Nebula' 

Tony G

[Daniel]

Incredible shot Robert, Love the composition, shows the sky as a whole rather than just focussing on one nebula without loss of resolution.

Would love to see some Ha,OIII,SII on this ;O)


Daniel
:O)