Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  Crescent nebula, NGC 6888
Getting plate-solving status, please wait...
Crescent Nebula, 



    
        

            Tony Cook
Crescent Nebula
Powered byPixInsight

Crescent Nebula

Technical card

Imaging telescopes or lenses: ASA N10 astrograph

Imaging cameras: canon 450D

Mounts: 10 Micron 1000 HPS

Focal reducers: ASA 3" Wynne Corrector 0.95x

Software: Russle Croman GradientXTerminator  ·  Noel Carbonni Astrotools  ·  Mike Unsold Images Plus  ·  Photoshop CS 2


Dates:Sept. 18, 2015

Frames: 87x240" ISO800

Integration: 5.8 hours

Darks: ~157

Flats: ~103

Flat darks: ~101

Avg. Moon age: 4.68 days

Avg. Moon phase: 22.83%

Mean SQM: 20.78

Temperature: 6.00


Basic astrometry details

Astrometry.net job: 790349

RA center: 20h 12' 14"

DEC center: +38° 21' 10"

Orientation: 93.582 degrees

Field radius: 0.765 degrees


Resolution: 3852x2564

Locations: Dark Sky Site, Kirby Malzeard, North Yorkshire, United Kingdom

Description

Now that September skies are dark and longer I've now started to work up experience with the ASA N10 astrograph by imaging the Crescent Nebula.

One major problem I've still to iron out is inevitable lens fogging with the Wynne Corrector. There appears to be no reasonable way to fit a lens heating tape as you have the whole mass of the focuser to deal with minimum thermal contact to the draw tube via 6 rollers!

Revision B: Added some deconvolution to counter poor seeing - via Images Plus Adaptive Richardson-Lucy restoration - 5x5 Gaussian PSF - 10 iterations in centre and 5 in the outer area

Comments

Author

Tonk
Tony Cook
License: Attribution-NonCommercial-NoDerivs Creative Commons
6310
Like

Revisions

  • Final
    Crescent Nebula, 



    
        

            Tony Cook
    B

Sky plot

Sky plot

Histogram

Crescent Nebula, 



    
        

            Tony Cook

In these public groups

Cloudy Nights