Chatroom
 

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   Bad Astronomy and Universe Today Forum > Science and Space > Astrophotography
Register FAQ Members List Calendar Mark Forums Read

   

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 18-November-2004, 10:35 PM
reckless's Avatar
reckless reckless is offline
Established Member
 
Join Date: Jul 2004
Location: Conon Bridge, Highlands, Scotland
Posts: 121
Default

I took this at 1940h UT on 18.11.04 using a Nikon Coolpix 5700 with settings 41.14sec (cable release), fl=71.2mm, f/4.2, ISO 200. The image quality setting was RAW so that I maximised the data within the image which I could work with.

The camera was piggy-backed to my scope and used a motorised drive to prevent star-trailing.

I also took a 50 second"darkframe" image and subtracted it from the original using Adobe Photoshop CS to remove any brightly coloured "hot pixels" and the "amp-in" area of the CCD. The darkframe corrected image was further processed using Adobe Photoshop CS and the stars and their colours have come out well. I have posted the darkframe corrected image here for comparison to let you see what this powerful bit of imaging software can do.

The Double Cluster in Perseus consists of NGC 869 (upper cluster) and NGC 884 (lower cluster) in the centre-left of this image.

Cheers from a very cold Bonnie Scotland.

Eric



Reply With Quote
  #2 (permalink)  
Old 19-November-2004, 12:30 AM
afterburn afterburn is offline
Junior Member
 
Join Date: Aug 2004
Posts: 83
Default

great shot!
Reply With Quote
  #3 (permalink)  
Old 19-November-2004, 03:59 AM
Dave Mitsky's Avatar
Dave Mitsky Dave Mitsky is offline
Order of Kilopi
 
Join Date: Sep 2003
Posts: 4,843
Default

Indeed, it is. Following the chain of stars extending from the left of NGC 869 leads to the open cluster Stock 2, which (in your image) forms an upright stick figure with flexed arms that is responsible for its nickname of the Muscleman Cluster.

Dave Mitsky
__________________
Chance favors the prepared mind.
De gustibus non est disputandum.
Never attribute to malice that which can be adequately explained by stupidity.
Reply With Quote
  #4 (permalink)  
Old 19-November-2004, 06:26 AM
imported_Josh
Guest
 
Posts: n/a
Default

Agreed! nice piece of work. Shows that even if you think that your images are weak they can be turned into masterpieces with a little bit of manipulation. I've tried (mostly unsuccessfully) to do a bit of astrophotography but without a mount and with a lower end telescope I haven't had much luck. however, a fair few images I've taken have come out looking like the darker image. Not quite as good, but ball park. and they were corrected. Still .. fun trying though.

Not a lot of replies in the astro threads apart from the "well done" and "great job" but I know I, at least, love looking into this forum and marvelling at the photographs you guys manage to get. Keep on posting!!
Reply With Quote
  #5 (permalink)  
Old 19-November-2004, 06:50 AM
hubble's Avatar
hubble hubble is offline
Junior Member
 
Join Date: Nov 2003
Posts: 55
Default

i myself have seen such a clustre but with less variety in the magnitude of the stars in it,
Reply With Quote
  #6 (permalink)  
Old 19-November-2004, 08:07 AM
reckless's Avatar
reckless reckless is offline
Established Member
 
Join Date: Jul 2004
Location: Conon Bridge, Highlands, Scotland
Posts: 121
Default

Thanks for the info. Dave. I didn't know about Stock 2, the Muscleman cluster. I zoomed in on it on the 28Mb .tif file I have on my PC and all the clusters look good.

I have made a .jpg image for the web and attached it here.

Cheers

Eric

Reply With Quote
  #7 (permalink)  
Old 19-November-2004, 10:13 AM
gavwvin's Avatar
gavwvin gavwvin is offline
Established Member
 
Join Date: Oct 2004
Posts: 230
Default

right on!
Reply With Quote
  #8 (permalink)  
Old 19-November-2004, 09:53 PM
Betelgeuse Betelgeuse is offline
Established Member
 
Join Date: Jul 2004
Posts: 594
Default

I regard that as being pretty impressive.
__________________
Science is wonderfully equipped to answer the question "How?" but it gets terribly confused when you ask the question "Why?"
Erwin Chargaff
Reply With Quote
  #9 (permalink)  
Old 21-November-2004, 12:08 PM
Manchurian Taikonaut's Avatar
Manchurian Taikonaut Manchurian Taikonaut is offline
Established Member
 
Join Date: Mar 2004
Location: Sol's pale blue dot
Posts: 1,645
Default

wonderful picture !!
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT. The time now is 04:17 PM.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2009, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.0.0
©  2006 Bad Astronomy and Universe Today