Messier 97 (HOO) (Linda)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 97 · NGC 3587 · Owl Nebula · PGC 2479154 · PGC 2479429 · PGC 2479466 · PGC 2480115 · PGC 2480239 · PGC 2481387 · PGC 2482169 · PGC 2482280 · PGC 2483306 · PGC 2489233 · PGC 2490291 · PGC 2490640 · PGC 2493264 · PGC 2494570 · PGC 2496406 · PGC 2497480 · PGC 34279 · PK148+57.1

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Messier 97 (HOO)

Link: https://lindasastronomyadventures.space/2022/03/16/messier-97-hoo/

Powered byPixInsight

Messier 97 (HOO)

Link: https://lindasastronomyadventures.space/2022/03/16/messier-97-hoo/

It' s easy to see why this got named the Owl Nebula with 'those darker circles giving the impression of owl eyes. Whatever you see in this planetary nebula, it makes for an interesting target.

We actually took data in S, H and O for this and the S signal was there but it was so faint that stretched as far as I could without making the remnants of some column defects visible it was still barely visible.

I ended up producing an SHO and an HOO but liked the HOO version better so that's what we get here.

Here's how I processed it:

H and O:
dynamic crop
deconvolution
starnet2 (creating stars)
tgv denoise
LHE (2 scales)

HOO:
channel combination (HOO)
histogram transformation to balance channels to taste
curves (contrast & color)
MLT sharpening
pixel math in O stars

I chose to use mono stars because the HOO stars had some red fringing (the H was stretched more than the O) and the stars otherwise had no color so I opted for mono stars and the O stars were smaller).

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Status	Advanced success
Started	...
Astrometry.net job	5593171
PixInsight job	JEKQSEPYHPAXVS3VW4074WM2H758XC24
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h14m50s.197
RA (top/left)	11h13m24s.989
RA (top/right)	11h13m18s.870
RA (bottom/right)	11h16m16s.516
RA (bottom/left)	11h16m20s.986

Dec (center)	+55°00′50″.29
Dec (top/left)	+54°43′09″.60
Dec (top/right)	+55°17′50″.18
Dec (bottom/right)	+55°18′26″.80
Dec (bottom/left)	+54°43′45″.80

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Messier 97 (HOO)

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Messier 97 (HOO)

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