#1  
Old 04-04-2020, 03:48 PM
ChrisV's Avatar
ChrisV (Chris)
Registered User

ChrisV is offline
 
Join Date: Aug 2015
Location: Sydney
Posts: 1,356
Chamaeleon I

Here's my attempt at Chamaeleon I, part of the Chamaeleon Dark Nebula Complex. 12 hrs of 90sec subs on an ASI071MC (UV/IR filter) and an 80mm refractor - processed in PI.

I had a lot of trouble trying to bring out any of the gas clouds. You can barely see them. I think the problem was a whole pile of uneven illumination. I tried to remove it with DBEextraction, and not clobber the dark and cloud bits. Part of it might be some remaining cloudy subs as it wasn't great Feb-Mar when I did this. Also, I suppose a big issue was that my scope was mostly pointing in the general direction of Sydney city (23km away).

Comments, suggestions please.
Almost gave up before I started processing when I saw Strongman Mike Sidonio's Cham II in Aus Sky&Telescope. And then I got delayed processing as the fan on my CPU cooler died. The replacement water cooled one took ages to arrive, but it really made a difference. Now with all 8 cores running at 100% it only touches 60C!!
http://www.astrobin.com/4c518c/

Hey, but enough of my first world whinging. Chris
Attached Thumbnails
Click for full-size image (Cha1_integration_2020_04_02-11_starReduce_bin2.jpg)
220.1 KB79 views

Last edited by ChrisV; 05-04-2020 at 04:27 PM.
Reply With Quote
  #2  
Old 04-04-2020, 06:53 PM
graham.hobart's Avatar
graham.hobart (Graham stevens)
DeepSkySlacker

graham.hobart is offline
 
Join Date: Nov 2008
Location: hobart, tasmania
Posts: 2,029
chameleon

I really like it chris- I love dark nebs
Reply With Quote
  #3  
Old 04-04-2020, 07:06 PM
Placidus (Mike and Trish)
Narrowing the band

Placidus is offline
 
Join Date: Mar 2011
Location: Euchareena, NSW
Posts: 3,297
That is soooo scary!

Very well done. A most impressive and memorable image.
Reply With Quote
  #4  
Old 04-04-2020, 07:17 PM
Geoff45's Avatar
Geoff45 (Geoff)
PI rules

Geoff45 is offline
 
Join Date: Jul 2006
Location: Sydney
Posts: 2,487
Itís a nice wide field Chris. A small refractor is always going to struggle with this one. Are you able to take more than 90s subs? I think that would help a lot.
I did a smaller part of this complex a couple of weeks ago with 12.5 inch scope. http://www.iceinspace.com.au/forum/s...d.php?t=181762. I guess there is no substitute for aperture.
Reply With Quote
  #5  
Old 04-04-2020, 11:40 PM
Ant0nio's Avatar
Ant0nio (Tony)
Quid Clarius Astris

Ant0nio is online now
 
Join Date: Apr 2018
Location: Gympie,Qld. Australia
Posts: 334
Well done Chris . You've managed to reveal the "creature" in your image of this challenging target.
A great effort imo.
Cheers,
Tony
Reply With Quote
  #6  
Old 05-04-2020, 08:48 AM
gregbradley's Avatar
gregbradley
Registered User

gregbradley is offline
 
Join Date: Feb 2006
Location: Sydney
Posts: 15,921
Dust type images are always tough as its so dim. You've done well there. I would have thought some of those features would be blue as they are dust reflection though.

Greg.
Reply With Quote
  #7  
Old 05-04-2020, 04:26 PM
ChrisV's Avatar
ChrisV (Chris)
Registered User

ChrisV is offline
 
Join Date: Aug 2015
Location: Sydney
Posts: 1,356
Thanks all for the comments.

Geoff - yes I saw your nice shot of IC2631. At 90sec I figure my subs are swamping read noise without oo much star saturation.

Greg - that was a big concern, colour. I had a lot of trouble with background extraction on a wide field with such a variable area. I looked at a bunch of images others have done on it and tried to imagine how it should go. Earlier versions had a lot of red around the centre of the image which I did't think should be there.
Reply With Quote
  #8  
Old 06-04-2020, 11:07 AM
multiweb's Avatar
multiweb (Marc)
ze frogginator

multiweb is offline
 
Join Date: Oct 2007
Location: Hinchinbrook
Posts: 18,796
Brilliant! Such a nice part of the sky.
Reply With Quote
  #9  
Old 06-04-2020, 11:15 AM
Atmos's Avatar
Atmos (Colin)
Ultimate Noob

Atmos is online now
 
Join Date: Aug 2011
Location: Melbourne
Posts: 6,629
You’ve done a good job to capture a dark nebula from Sydney, light pollution really murders darker nebula
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 11:04 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Astromechanics
Advertisement
Bintel
Advertisement
Lunatico Astronomical
Advertisement
Testar
Advertisement
Astronomy and Electronics Centre
Advertisement