The Leo Triplet in HaLRGB (Bogdan Borz)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: IC 2708 · IC 2745 · Leo Triplet · M 65 · M 66 · NGC 3623 · NGC 3627 · NGC 3628

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The Leo Triplet in HaLRGB

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The Leo Triplet in HaLRGB

I finally went into the unknown and tried a first LRGB monochrome image from my light polluted backyard. I did not use a light pollution filter, pretty concerned by the risk of increasing the FWHM, especially when imaging a galaxy. While this is a mix of traveller data (only around 2h per channel) coming from a 4/5 Bortle zone, I am really pleased to see that LRGB is possible from my backyard. Gradients are pretty significant especially for luminance and the processing is tough, but I think that the final result is not so bad. The Zwo filters are pretty uneven and the B filter produces really bloated stars, so probably I'll have to change them one day. The stars were really hard to process. I tried not to stretch the galaxies too much in order to keep as much structure as possible.

I introduced an hour of Ha, which is present mainly in the arms of M66, but all the galaxies have some signal, NGC 3628 the least.

The Triplet is a classic group of galaxies from the Leo constellation, situated at "only" 35 millions light-years away. It is situated near the hind legs of the Lion.

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Description: the annotated Pixinsight version

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ZWO ASI1600MM/QHY163M
AAA : Astronomes et Astrographes Amateurs
Astrophotographes (France)
Narrowband imaging
AstroBin Platform open discussions community forum
Light Polluted skies

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Status	Advanced success
Started	...
Astrometry.net job	3292594
PixInsight job	FBV8GCK5PNXM6TOS9BZCMA4U6U21HGPB
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h19m55s.70
RA (top/left)	11h17m58s.20
RA (top/right)	11h17m53s.12
RA (bottom/right)	11h21m51s.38
RA (bottom/left)	11h21m57s.79

Dec (center)	+13°17′24″.0
Dec (top/left)	+13°59′29″.9
Dec (top/right)	+12°36′13″.5
Dec (bottom/right)	+12°35′16″.3
Dec (bottom/left)	+13°58′32″.1

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The Leo Triplet in HaLRGB

The Leo Triplet in HaLRGB

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