Hemisphere:  Northern  ·  Constellation: Andromeda (And)  ·  Contains:  Andromeda Galaxy  ·  M 110  ·  M 31  ·  M 32  ·  NGC 205  ·  NGC 221  ·  NGC 224  ·  The star νAnd
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Great Andromeda nebula, 


Great Andromeda nebula
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Great Andromeda nebula

Technical card

Imaging telescopes or lenses: Takahashi Sky90  ·  Vixen Newton R200SS f/4

Imaging cameras: Canon 6D Modified Canon 6Da  ·  Canon EOS 760D

Mounts: Losmandy G9

Focal reducers: Vixen Coma Corrector PH

Software: PixInsight 1.8.8 Ripley

Filters: Optolong L-Pro 2"

Accessory: Lacerta MGEN 2 at 8x50 finder

Dates:Dec. 18, 2020

IDAS LPS D2: 7x480" ISO800
Optolong L-Pro 2": 7x480" ISO800

Integration: 1.9 hours

Flats: ~15

Bias: ~50

Avg. Moon age: 4.08 days

Avg. Moon phase: 17.66%

Bortle Dark-Sky Scale: 4.00

Basic astrometry details

Astrometry.net job: 4156445

RA center: 0h 42' 48"

DEC center: +41° 18' 39"

Pixel scale: 1.775 arcsec/pixel

Orientation: 200.245 degrees

Field radius: 1.564 degrees

Resolution: 5016x3884

Data source: Traveller


A combination of the image with the Vixen R200SS and the Takahashi Sky90. Only 2x seven lights were used. The different filters give interesting differences in the blue stars. The IDAS D2 filters more blue light. The two images can be found here
Sky90: https://astrob.in/v340vi/0/
R200SS: https://astrob.in/kjpw87/0/

The two series of frames were calibrated and debayered with flats and bias images of each series. Then all 14 frames were drizzle integrated with a distortion correction, which was necessary at the corners. Drizzle integration brought better resolution than the two separet images. It was necessary to take care of the different orientations of the two series of images.

I hope you like it. Let me know what you think.