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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 in Ha, 


M31 in Ha
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M31 in Ha

Technical card

Imaging telescopes or lenses:

Imaging camera:Nikon D5300 Full Spectrum Modified

Mount:Celestron AVX Mount

Guiding telescope or lens:Agena Astro Guidescope, 50mm f/3.8, 190 mm focal length

Guiding camera:ZWO ASI120MC-S

Focal reducer:William Optics Flat 6A II

Software:PixInsight 1.8

Filter:Optolong L-eNhance 2"


Resolution: 5179x3203

Dates:Nov. 10, 2019Nov. 12, 2019Nov. 15, 2019

Frames:Optolong L-eNhance 2": 58x360" ISO400

Integration: 5.8 hours

Darks: ~25

Flats: ~15

Flat darks: 0

Bias: ~25

Avg. Moon age: 15.04 days

Avg. Moon phase: 95.62%

Bortle Dark-Sky Scale: None

Mean SQM: None

Mean FWHM: None

Temperature: None

Basic astrometry details job: 3090409

RA center: 0h 42' 43"

DEC center: +41° 14' 9"

Pixel scale: 2.087 arcsec/pixel

Orientation: 96.400 degrees

Field radius: 1.765 degrees

Locations: Home, Silver Spring, Maryland, United States

Data source: Backyard


Imaged the Andromeda Galaxy (M31) on the nights of November 10, 12 & 15, 2019 using an Optolong Lenhance dual narrowband filter. This image is the R channel with the H-alpha data. Will be using the Ha data to generate a NBRGB image in combination with RGB data taken with an LPSD1 filter.

Imaged with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, Optolong Lenhance dual narrowband filter, and full spectrum modified Nikon D5300.

Pre-processed using PixInsight Batch Pre-Processing (BPP) script. Images calibrated using darks, bias, and flats. Extracted red/green/blue channels using BatchChannelExtraction script. Registered and stacked using StarAlighment and Integration. Total integration time of ~6 hours using 58 subs at ISO400x360 sec. Post-processed in Pixinsight: Cropped, gradient removal with ABE, MLT for noise reduction, stretched using STF settings in Histogram Transformation Tool, Curves Transformation, TGVDenoise for noise reduction, HDR transform, Local histogram transform.



License: None (All rights reserved)

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Sky plot


M31 in Ha,