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:  North America nebula, NGC 7000, NGC 6997
Getting plate-solving status, please wait...
North America Nebula, 





    
        

            Don Walters
North America Nebula

North America Nebula

Technical card

Resolution: 3520x4656

Dates:July 21, 2018

Frames:
Astrodon 3nm Ha: 21x180" (gain: 200.00)
Astrodon 3nm OIII: 21x180" (gain: 200.00)

Integration: 2.1 hours

Darks: ~35

Flats: ~50

Flat darks: ~50

Avg. Moon age: 9.00 days

Avg. Moon phase: 66.90%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 2166068

RA center: 314.706 degrees

DEC center: 44.089 degrees

Pixel scale: 1.629 arcsec/pixel

Orientation: 355.511 degrees

Field radius: 1.320 degrees

Locations: My Backyard, Benton, AR, United States

Data source: Backyard

Description

This was my first time using an off-axis guider, and I'm glad I did! My guide RMS is now less than half what I was getting with a guide scope. I saw as low as 0.4, but typically got from 0.6-1.0.

I also increased my dithering to 20 pixels, since I had to change it anyway for the OAG.

All calibration, stacking, and processing done in PixInsight:

Calibrated my Flats with Flat-Darks
Calibrated my lights against a master dark and master flats (no bias)
Integrated all calibration frames with Winsoried clipping
Integrated my Ha/OIII/SII masters with linear fit clipping
Drizzle up by 2x
Resample down by 1/2
MLT (noise reduction) to each master
Combined using Pixelmath:
R = Ha
G = 65%*Ha / 35%*OIII
B = OIII
Histogram transformation
Unsharp mask
HDRMT (with star mask)

Comments

Author

Don
Don Walters
License: None (All rights reserved)
440
Like

Sky plot

Sky plot

Histogram

North America Nebula, 





    
        

            Don Walters