Hemisphere:  Northern  ·  Constellation: Pegasus (Peg)  ·  Contains:  HD204571  ·  HD204712  ·  HD204862  ·  M 15  ·  NGC 7078  ·  PK065-27.1
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M15 -  Globular Cluster in Pegasus, 



    
        

            Steve Ludwig
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M15 - Globular Cluster in Pegasus

Getting plate-solving status, please wait...
M15 -  Globular Cluster in Pegasus, 



    
        

            Steve Ludwig
Powered byPixInsight

M15 - Globular Cluster in Pegasus

Acquisition details

RA center: 21h29m55s.31

DEC center: +12°0852.5

Pixel scale: 1.198 arcsec/pixel

Orientation: -145.797 degrees

Field radius: 0.503 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 2402x1834

File size: 1.5 MB

Data source: Backyard

Description

Equipment

- Main scope: Bresser Messier 10" Newton (254/1270)
- Main camera: Nikon D3300 (unmodified)
- Guide scope: Orion AC 50/162 Deluxe Mini
- Guide camera: ZWO ASI 290MC
- Mount: Skywatcher EQ6-R
- Explore Scientific HR coma corrector

Acquisition

- 53 lights x 300 s = 4 h 25 min
- no dark, flat, bias frames
- no filters
- ISO 100
- Bortle 4

Processing (latest revision)

- stacked in DSS
- bilinear debayer method & median kappa sigma clipping

- unmodified TIF opened in PixInsight
- STF stretch
- dynamic crop
- dynamic background extraction
- background neutralization
- color calibration
- histogram transformation
- SCNR green to remove greenish noise
- range selection to create star mask
- curves transformation to increase star saturation
- range selection to create mask of background
- curves transformation to reduce background saturation
- ACDNR to reduce background noise
- unsharp mask to increase sharpness of stars
- resample 50% to improve general noise (not much detail loss as the image was oversampled anyway)
​​​​​​​- final ACDNR to reduce background noise again
- final histogram / curves transformations
- saved as jpg

Comments

Sky plot

Sky plot

Histogram

M15 -  Globular Cluster in Pegasus, 



    
        

            Steve Ludwig