User Links for
 nheacock







CURRENT MOON
(North America)
History
209 Entries
08/21/17
09/13/15
08/16/15
07/18/15
06/14/15
05/28/15
06/17/12
06/05/12
05/18/12
05/15/12
05/13/12
05/12/12
05/11/12
08/31/11
07/01/11
06/24/11
06/01/11
04/29/11
04/22/11
04/19/11
04/18/11
03/28/11
03/27/11
03/22/11
03/14/11
02/25/11
02/17/11
02/08/11
02/01/11
01/31/11
01/02/11
12/30/10
10/13/10
09/12/10
08/28/10
08/15/10
07/17/10
07/11/10
07/07/10
06/14/10
06/07/10
05/20/10
04/24/10
04/10/10
03/22/10
03/18/10
03/15/10
03/05/10
02/21/10
02/09/10
01/13/10
12/14/09
12/09/09
12/08/09
12/05/09
12/01/09
11/24/09
11/01/09
09/24/09
• 09/19/09
09/01/09
08/30/09
08/22/09
08/15/09
08/12/09
07/25/09
07/22/09
07/21/09
07/02/09
07/01/09
06/29/09
06/22/09
06/15/09
05/22/09
05/21/09
05/20/09
05/07/09
04/30/09
04/24/09
04/20/09
03/29/09
03/27/09
03/26/09
03/06/09
02/28/09
02/15/09
01/19/09
09/27/08
09/25/08
09/22/08
08/27/08
08/03/08
07/25/08
07/24/08
07/11/08
07/07/08
07/06/08
07/04/08
07/02/08
06/27/08
06/24/08
06/12/08
05/03/08
04/30/08
04/11/08
03/24/08
03/05/08
02/21/08
02/17/08
02/16/08
01/15/08
11/06/07
09/11/07
08/28/07
08/18/07
07/26/07
07/13/07
07/10/07
07/09/07
06/15/07
05/14/07
05/10/07
05/07/07
04/22/07
04/15/07
03/16/07
12/17/06
12/02/06
08/27/06
07/23/06
07/20/06
07/19/06
07/16/06
06/23/06
06/13/06
06/10/06
05/22/06
05/02/06
04/28/06
04/23/06
04/01/06
03/11/06
02/12/06
01/25/06
11/09/05
11/08/05
10/27/05
09/27/05
09/12/05
08/01/05
07/29/05
07/25/05
07/24/05
07/18/05
07/14/05
07/09/05
07/04/05
06/26/05
06/18/05
05/06/05
03/12/05
03/11/05
01/10/05
01/02/05
12/30/04
12/06/04
11/03/04
11/01/04
09/22/04
09/21/04
09/10/04
09/06/04
09/05/04
08/13/04
08/08/04
08/07/04
08/06/04
08/03/04
07/20/04
07/12/04
07/10/04
07/08/04
07/06/04
07/05/04
06/28/04
06/22/04
06/19/04
06/18/04
06/16/04
06/15/04
06/14/04
05/31/04
05/23/04
05/14/04
05/09/04
05/08/04
04/30/04
04/25/04
04/23/04
04/22/04
04/21/04
04/19/04
04/09/04
04/01/04
03/30/04
03/29/04
03/08/04
03/02/04
02/24/04
    
Saturday, September 19th, 2009
Hmm... a feeble attempt I'm afraid. This is the longest exposure I've taken from my house and the  longest exposure at a single sitting I've ever done. And it's kinda lame. My skies are pretty good, but apparently not nearly good enough to do dark nebulae. This is an attempt at Barnard 150 in Cepheus. 4 hours of data on a dark and steady night. The nebula is there, but more of a void and not much of a dust cloud. I've got this on my list for ITS next year.
 
Barnard 150 B150 Image
Sooo... yeah. Prolly won't spend any time doing one of these again. Not from here.

Scope: Vixen R200SS 200mm @ f/4 w/Vixen R200SS Coma Corrector
Mount: Orion Sirius EQ-G with GoTo
Guiding:  Meade DSI Pro and PHD Guiding
Guide Scope: William Optics ZenithStar 66 SD
Camera: Canon EOS 20D (unmodified)
Special Settings: None
ISO: 800
Exposure: 4 hour - (48 x 300s)
Processing Software: Acquired in Nebulosity with high dithering, Stacked in Deep Sky Stacker (Kappa-Sigma Clipping for all frames), Levels, Curves, Astronomy Tools, Gradient XTerminator and Noise Ninja in Photoshop
Support Files: 24 flats, 24 bias, 24 darks
See Gallery below for image

Owl Cluster NGC 457 Image
This one is part of my ISO 400 test. I took this one with 90 second frames due to the bright stars in the cluster.

Scope: Vixen R200SS 200mm @ f/4 w/Vixen R200SS Coma Corrector
Mount: Orion Sirius EQ-G with GoTo
Guiding:  Meade DSI Pro and PHD Guiding
Guide Scope: William Optics ZenithStar 66 SD
Camera: Canon EOS 20D (unmodified)
Special Settings: None
ISO: 400
Exposure: 52.5 minutes - (35 x 90s)
Processing Software: Acquired in Nebulosity with high dithering, Stacked in Deep Sky Stacker (Kappa-Sigma Clipping for all frames), Levels, Curves, Astronomy Tools, Gradient XTerminator and Noise Ninja in Photoshop
Support Files: 24 flats, 24 bias, 24 darks
See Gallery below for image


Andromeda Galaxy M31 Image
This one is also part of the ISO 400 tests. The last one I did was pretty dumb to do during a full moon. This one is the opposite having been taking during a new moon. The previous shot is here.

Scope: Vixen R200SS 200mm @ f/4 w/Vixen R200SS Coma Corrector
Mount: Orion Sirius EQ-G with GoTo
Guiding:  Meade DSI Pro and PHD Guiding
Guide Scope: William Optics ZenithStar 66 SD
Camera: Canon EOS 20D (unmodified)
Special Settings: None
ISO: 400
Exposure: 2 hour - (24 x 300s)
Processing Software: Acquired in Nebulosity with high dithering, Stacked in Deep Sky Stacker (Kappa-Sigma Clipping for all frames), Levels, Curves, Astronomy Tools, Gradient XTerminator and Noise Ninja in Photoshop
Support Files: 24 flats, 24 bias, 1 dark used as a bad pixel map
See Gallery below for image



Image Gallery For This Session
01 Barnard 150 4h Color 01 Barnard 150 4h Gray
02 Owl Cluster 52m 30s 03 M31 2h iso400
   

01-Barnard-150-4h-Color.jpg
Click picture above for larger version
If the picture seems too bright or too dark, try adjusting the brightness below.
Brightness:
|
  



Comments:
On 10/07/09 at 04:59am Derek wrote:
I really like the image of the Owl Cluster. Lovely star colours and nice exposure. That cluster has always looked like a mini Canis Major to me, but it's a lovely object regardless. :-)

And you got a good result with the dark neb pic, especially in light polluted skies.

Keep up the great work. I'm looking forward to more! :-)

On 09/25/09 at 04:46am Dave wrote:
The "gizmo" seems to work like a charm !!
I like the current result !!

On 09/21/09 at 07:02pm Andy-W7ATR wrote:
Nice shot, I dont think ive ever seen a shot of dark matter that wasn't done by the usual high dollar sites...

On 09/21/09 at 04:59pm Barry wrote:
Thanks for the tip. I have been at it for 3 years and I still haven't got a handle on it yet. Slow learner I guess.

On 09/21/09 at 02:58pm Dave wrote:
You should expose till histogram 1/2 way to right...however long that takes.
So longer at a dark site...
Whatever the S/N ratio you have in your equipment,the longer the exposure the better the data.
"Sky limited" refers to how bright your sky is/how long you can expose for.
Every second you expose you get MORE signal than noise...its the gradient (sky) that limits you..
Took me forever to "get" that....

On 09/20/09 at 09:16pm Barry wrote:
I think this is a nice shot. The dark nebula is pretty cool. One of the RCA astro-photo guys at Hancock was telling me that he seldom uses more than 30 second exposures at home.....he feels it minimizes light polution issues.... whereas he uses much longer exposures at dark sky sites. Does that make sense?



Add A Comment:
Your Name (optional):

*Your Comment:



CAPTCHA Image   Reload Image
Enter Code*:


NOTE: Comments are moderated and do not post immediately.



© 2008 Triad Technology Systems | www.triadtechsys.com