Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent Nebula  ·  NGC 6888  ·  The star 34Cyg  ·  The star 40Cyg  ·  The star Sadr (γCyg)
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Sadr region - very widefield, 



    
        

            Dan Kordella
Sadr region - very widefield
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Sadr region - very widefield

Getting plate-solving status, please wait...
Sadr region - very widefield, 



    
        

            Dan Kordella
Sadr region - very widefield
Powered byPixInsight

Sadr region - very widefield

Technical card

Imaging cameras: Atik One 6MP

Mounts: Orion Atlas EQ-G

Guiding telescopes or lenses: Guidescope 50mm

Guiding cameras: Atik GP mono

Software: PixInsight  ·  Alignmaster by Matthias Garzarolli EQ align  ·  Maxim DL Pro 5

Filters: Baader Ha 7nm 1.25"


Dates:May 28, 2016

Frames: 8x900" (2h)

Integration: 2h

Avg. Moon age: 21.10 days

Avg. Moon phase: 61.01%


Basic astrometry details

Astrometry.net job: 3884272

RA center: 20h 18' 53"

DEC center: +40° 22' 30"

Pixel scale: 9.773 arcsec/pixel

Orientation: 0.387 degrees

Field radius: 4.624 degrees


Resolution: 2664x2124

Locations: near home, Montgomery Village, Maryland, United States

Data source: Traveller

Description

using a Tokina 100mm f/2.8 at f/5.6 (mostly).

This lens looks to have some coma that shows at faster f-stops. F/5.6 is okay, but probably need to be at f/8 for this lens, which is slower than I want to use for narrowband.

Comments

Sky plot

Sky plot

Histogram

Sadr region - very widefield, 



    
        

            Dan Kordella