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Contains:  Great Nebula in Andromeda, M 110, M 31, M 32, NGC 205, NGC 221, NGC 224
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M31, 



    
        

            JDJ
M31
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M31

Technical card


Dates:Nov. 2, 2019Nov. 24, 2019

Frames:IDAS LPS D1 Clip Filter (Nikon D5300): 112x180" ISO200

Integration: 5.6 hours

Darks: ~25

Flats: ~15

Bias: ~25

Avg. Moon age: 16.39 days

Avg. Moon phase: 18.69%


Basic astrometry details

Astrometry.net job: 3090375

RA center: 0h 42' 43"

DEC center: +41° 14' 9"

Pixel scale: 2.087 arcsec/pixel

Orientation: 96.396 degrees

Field radius: 1.765 degrees


Resolution: 5179x3203

Locations: Home, Silver Spring, Maryland, United States

Data source: Backyard

Description

Imaged the Andromeda Galaxy (M31) on the nights of November 2 & 24, 2019. This is first set of M31 images for the season. I took ~5 hours of RGB data using an LPS-D1 filter and ~5 hours of narrowband data using an Optolong Lenhance dual narrowband filter. This first image is the RGB version generated from the LPSD1 filter data.

Imaged with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, IDAS LPS D1 Clip Filter, and full spectrum modified Nikon D5300.

Pre-processed using PixInsight Batch Pre-Processing (BPP) script. Images calibrated using darks, bias, and flats. Stacked 112 subs (180 sec at ISO 200) for a total integration time of ~5 hours. Post-processed in Pixinsight: Cropped, gradient removal with ABE, MLT for noise reduction, Photometric Color Calibration, stretched using masked stretch, Curves Transformation, ACDNR for noise reduction, Morphological Transformation to shrink stars, Local histogram transform, and Color Saturation boost.

Comments

Author

JDJ
JDJ
License: None (All rights reserved)
1020
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Revisions

  • M31, 



    
        

            JDJ
    Original
  • Final
    M31, 



    
        

            JDJ
    B

B

Description: HDR transform to increase dust lane visibility. Cropped to remove off-color edges.

Sky plot

Sky plot

Histogram

M31, 



    
        

            JDJ