Andromeda Galaxy M31 Large Field (Mau_Bard)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: 26 And · 27 And · 27 rho And · 32 And · 35 And · 35 nu. And · 37 And · 37 mu. And · 39 And · 41 And · Andromeda Galaxy · IC 1550 · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 221 · NGC 224 · NGC 317 · Part of the constellation Andromeda (And) · R And · The star 26 And · The star 32 And · The star 39 And · The star 41 And · The star μ And · The star ν And · The star ρ And

Andromeda Galaxy M31 Large Field

After some hesitation I resolved to bring my Samyang 135 setup with me on holiday. I then had the opportunity, for the first time in my "career" as an astro-photographer, to take pictures from a relatively dark Bortle 4 location. I did expect an improvement of quality by moving from Bortle 6/7 of my home observatory to Bortle 4, nevertheless I was shocked when I saw the difference on real images.

Picture 1: Unprocessed M31 RGB subs. The one on the left has been taken from Bortle 4 (SQM 20.50) location in Tuscany, Italy, while the right one comes from Bortle 6 (SQM 18.95) home observatory in Vienna, Austria. Apart from the location, all the rest is equal (OK... the two images have opposite orientation!). The difference in captured signal is stunning.

The image published here has been produced exclusively using Bortle 4 RGB subs, plus Bortle 6 Ha data.

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Notwithstanding the large field of view, most of the tiny M31 Globular clusters are resolved. I have dedicated a specific image to M31 globular clusters mapping, and in the past I portrayed the Cluster G1 (Mayall II) with a longer focal here.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	8451925
PixInsight job	6PFZYKLGT6KIYXXCU71SKA1TESH3S5FC
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m41s.72
RA (top/left)	00h18m29s.85
RA (top/right)	01h06m53s.73
RA (bottom/right)	01h09m21s.61
RA (bottom/left)	00h16m02s.50

Dec (center)	+41°15′23″.10
Dec (top/left)	+37°54′07″.5
Dec (top/right)	+37°53′50″.6
Dec (bottom/right)	+44°15′39″.0
Dec (bottom/left)	+44°15′59″.9

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Andromeda Galaxy M31 Large Field

Andromeda Galaxy M31 Large Field

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Andromeda Galaxy M31 Large Field

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