Owl Nebula, a LRGB, narrowband picture (Niels V. Christensen)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 97 · NGC 3587 · Owl nebula · PK148+57.1

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Owl Nebula, a LRGB, narrowband picture

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Owl Nebula, a LRGB, narrowband picture

A combination of subs taken in March 2016 & 2019.

Exposure details from 1. March 2019,

WO FLT-110/ZWO 1600MM cool: L=64x120sec

16" F6.2 SCT/Atik Horizon: Ha, OIII, SII=8,7,7x300sec

Exposure details from 11. March 2019,

WO FLT-110/ZWO 1600MM cool: L=9x120sec, RGB=87x120sec

16" F6.2 SCT/Atik Horizon: L=8x60sec, RGB=38x120sec+60x60sec

Main part of the Ha, OIII, SII info. come from this picture, taken in 2016,

https://astrob.in/162408/E/

The green halo surrounding M97 is coming from OIII information that was merged into the green & blue color "channels".

My home build observatory is placed in my front yard/in the "red light" pollution zone, have a look here,

Red Zone

The different M97 LRGB, NB stacks can be shown/shared if needed, please just let me know.

CS Niels

Original
Final
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Description: Minor level adjustment performed :-)

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"Nordish by nature"
Narrowband imaging

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Status	Advanced success
Started	...
Astrometry.net job	2580647
PixInsight job	E9167TVQMYYRO7TTRVEVSUJTHGZ85W6M
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h14m36s.16
RA (top/left)	11h19m29s.46
RA (top/right)	11h14m59s.99
RA (bottom/right)	11h09m39s.35
RA (bottom/left)	11h14m13s.28

Dec (center)	+55°03′51″.6
Dec (top/left)	+54°49′02″.1
Dec (top/right)	+55°48′23″.0
Dec (bottom/right)	+55°17′55″.8
Dec (bottom/left)	+54°19′20″.2

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Owl Nebula, a LRGB, narrowband picture

Owl Nebula, a LRGB, narrowband picture

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Owl Nebula, a LRGB, narrowband picture

Owl Nebula, a LRGB, narrowband picture

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