A Space & astronomy forum. SpaceBanter.com

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » SpaceBanter.com forum » Others » Astro Pictures
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

ASTRO: vdB 144 Yet another blue reflection nebula



 
 
Thread Tools Display Modes
  #1  
Old June 1st 13, 06:53 AM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
external usenet poster
 
Posts: 3,085
Default ASTRO: vdB 144 Yet another blue reflection nebula

VdB 144 is a very faint reflection nebula around an orange K0III star.
Usually these are found around blue giant stars not orange giant ones
though it is so bright in my image it looks rather white due to a
monitor's limited response. The nebula is about 700 light years distant
in the northeastern part of Cygnus the Swan. At least that is the
distance The Sky gives for its illuminating star HD 206509 (44453700
AU). Since the nebula is very blue the star has to be behind it
otherwise it would pick up a lot of the color of the star and that seems
totally missing. Due to the spectral difference I was able to rather
reduce the star without harming the nebula, something that's almost
impossible when it is lit by a blue giant.

When I went to process this image I found the luminance frames all
unusable as some idiot left the lights on in the observatory! I was
going to retake them but see that never happened. Fortunately the color
was taken the following night and I had apparently shut off the lights
as they all were fine. So I made a pseudo luminance frame from the 6
color frames. This is why I normally don't bin color differently than
the lights. It saves your backside sometimes! This meant I didn't go
as deep as I would have liked but the result is pretty good. I tried to
compare this to other images on the net but other than POSS images
Google didn't turn any up other than this great wide field image of Tom
Davis, http://www.tvdavisastropics.com/astr...s-1_0000c6.htm . His
image is west at the top so rotate it clockwise 90 degrees to match
mine. Or rotate mine 90 degrees counter-clockwise to match his.

14" LX200R @ f/10, Pseudo L=6x10' RGB=2x10', STL-11000XM, Paramount ME

Rick
--
Prefix is correct. Domain is arvig dot net

Attached Thumbnails
Click image for larger version

Name:	VDB144PSEUDOL6X10RGB2X10R1.JPG
Views:	224
Size:	348.9 KB
ID:	4624  
Ads
 




Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
ASTRO: vdB 133 A nice reflection nebula -- right images this time Rick Johnson[_2_] Astro Pictures 0 August 30th 12 07:52 AM
ASTRO: vdB 133 A nice reflection nebula Rick Johnson[_2_] Astro Pictures 0 August 30th 12 06:00 AM
NGC 7023: Iris nebula - a bright reflection nebula Danilo Pivato CCD Imaging 3 July 9th 11 12:18 PM
ASTRO: NGC 7023: Iris nebula - a bright reflection nebula Danilo Pivato Astro Pictures 0 July 5th 11 10:08 PM
ASTRO: IC 477/2169 -- a large reflection nebula Rick Johnson[_2_] Astro Pictures 4 June 14th 09 12:49 AM


All times are GMT +1. The time now is 09:51 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright 2004-2021 SpaceBanter.com.
The comments are property of their posters.