Hemisphere:  Northern  ·  Contains:  Great Nebula in Andromeda  ·  M 110  ·  M 31  ·  M 32  ·  NGC 205  ·  NGC 221  ·  NGC 224
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M31 Andromeda Galaxy HaLRGB, 


            Michael Caller
M31 Andromeda Galaxy HaLRGB
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Technical card

Imaging telescopes or lenses: Skywatcher Esprit 100 ED

Imaging cameras: ZWO 1600MM-C

Mounts: EQ6 R Pro SkyWatcher

Guiding telescopes or lenses: Altair astro 60mm guide scope Guidescope

Guiding cameras: Altair Astro GP Cam2 130 mono Guide Camrea

Software: Photoshop CC 2019  ·  PixInsight PinInsight 1.8.6  ·  FITS Liberator 3  ·  PhD 2  ·  Sequence Generator Pro Sequence Generator  ·  QHY-CCD Polemaster Software Polemaster

Filters: ZWO 36mm 7nm Ha  ·  ZWO 36mm Green Filter  ·  ZWO 36mm Red Filter  ·  ZWO 36mm Blue Filter  ·  ZWO 36mm Luminance Filter

Accessory: Pegasus Astro Ultimate Powerbox Ultimate Powerbox  ·  Pegasus Astro FocusCube  ·  Intel Compute Stick  ·  Homemade GPS unit

Dates:Aug. 30, 2019

ZWO 36mm 7nm Ha: 10x180" (gain: 139.00) -20C bin 1x1
ZWO 36mm Blue Filter: 29x60" (gain: 139.00) -20C bin 1x1
ZWO 36mm Green Filter: 26x60" (gain: 139.00) -20C bin 1x1
ZWO 36mm Luminance Filter: 152x60" (gain: 139.00) -20C bin 1x1
ZWO 36mm Red Filter: 28x60" (gain: 139.00) -20C bin 1x1

Integration: 4.4 hours

Darks: ~50

Flats: ~50

Flat darks: ~50

Avg. Moon age: 0.08 days

Avg. Moon phase: 0.01%

Bortle Dark-Sky Scale: 6.00

Basic astrometry details

Astrometry.net job: 2893959

RA center: 0h 42' 46"

DEC center: +41° 15' 54"

Pixel scale: 1.413 arcsec/pixel

Orientation: 266.096 degrees

Field radius: 1.104 degrees

Resolution: 4541x3322

Locations: Backyard, South Croydon, Surrey, United Kingdom

Data source: Backyard


So last night was an interesting night! Everything went well until I woke up at 2am and found that at 1am I lost power (tripped breaker) however I managed to get back on track and obtain 4.5hr of data.

Although I was only meant to do luminance I did slip in some Ha & RGB.

My luminance data seemed to have alot of gradient not sure why , think it may be my LED lamppost directly outside my garden. I'm still waiting for my adaptor for IDAS D2 filter.

152x60sec Luminance
28x60sec Red
26x60sec Green
29x60sec Blue
10x180sec Ha

I have another two clear nights ahead of me , so not sure whether to increase my data on M31 or choose another target.



Michael Caller
License: None (All rights reserved)

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M31 Andromeda Galaxy HaLRGB, 


            Michael Caller

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