Jump to content

Banner.jpg.b83b14cd4142fe10848741bb2a14c66b.jpg

Cresecnt Nebula & Friend in Ha


Rodd

Recommended Posts

Finished my Ha channel of NGC 6888 (Crescent Nebula) with Televue np101is and SBIG STT-8300.  Image consists of 20-20minute subs in Ha, fully calibrated (33 darks, 400 bias, 33 flats) at -40.  I did not know about the Soap Bubble Nebula until I saw a full tricolor image and realized it had to be in my FOV.  Sure enough--there it is near the bottom edge of the center of the image (right above the remaining vestige of a short, black alignment anomaly on the bottom edge of the image about 1/3 the way from the right hand edge).  The image was dithered and drizzle integrated.  Drizzle not only recovers some resolution and makes stars less square--it also eliminates most of any alignment anomalies along the edges of the pic.  I did not know this.  I have included a crop of the soap bubble.

No processing was done on the image.  No curves or noise reduction or anything else.  I am waiting until I get my OII and SII data (and RGB for stars)

Ha_20_20min_minus45_drz_clone1.jpgSoap Bubble Crop.jpg

 

Link to comment
Share on other sites

7 hours ago, Pompey Monkey said:

Nicely :)

That drizzling really rounds out the faint stars.

I'm imaging at about 2.7" p/p and definitely have square stars, so I will give this a go. How long did it take to drizzle integrate? you must have quite a good computer ;)

Paul,

It didn't take that long--then again I didn't sit at the computer and wait.  I am too impatient for that.  1 minute seems like an eternity if you wait.  It took less than 10 minutes.  I use a core i7 6500 processor with 16gig RAM and an SSD hard drive.  

Link to comment
Share on other sites

6 hours ago, swag72 said:

This is looking really nice indeed :) It's so great to know that this target is coming back into view!

Thank you Sara:hello2:

Your opinion means allot--I feel like the Imoji guy.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.