Contrasting death of two stars: the supernova remnant SH2-221 and the giant planetary nebula SH2-216 (Des McMorrow)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 12 Aur · 13 Aur) · 13 alf Aur · 53 Per · 53 d Per · 59 Per · 7 Aur) · 7 eps Aur · Al Ma'az · Alanz (ε Aur · Alhajoth (α Aur · Almaaz · Auriga · B15 · B16 · B17 · B25 · Capella · HD27523 · HD27795 · HD27846 · HD28005 · HD28082 · HD28280 · HD28353 · HD28416 · HD28772 · HD29093 · HD29180 · HD29203 · And 99 more.

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Contrasting death of two stars: the supernova remnant SH2-221 and the giant planetary nebula SH2-216

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Contrasting death of two stars: the supernova remnant SH2-221 and the giant planetary nebula SH2-216

HSO image with RGB stars of the supernova remnant SH2-221 and the giant planetary nebula SH2-216.

Both targets are quite weak and consequently the processing of the data on the nebula was quite tricky even with 16hrs
of NB data shot at f2. One surprise to me at least is the significant amount of Sii signal which accounts for yellows dominating the
image in the HSO palette.
The stars were imaged at f4 endowing Capella with what to my eye at least are attractive diffraction spikes.

I now have twin Samyang 135/asi2600MM/AM5 rigs (and can swap in the asi2600MC for efficient RGB imaging if required).
This should speed up data collection if there is ever a break in the clouds.

Thanks for looking.

Des

18/2/204 Revision: Switch to SHO palette....

Original
C
Final
D

Yorkshire Astro Imaging
Samyang 135 f/2
UK Astro-Imaging

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Status	Advanced success
Started	...
Astrometry.net job	9238719
PixInsight job	E0IS15QLLIX8FW8JD9LW942B0WDON6LX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h50m12s.60
RA (top/left)	05h17m41s.42
RA (top/right)	05h21m46s.33
RA (bottom/right)	04h19m06s.29
RA (bottom/left)	04h22m13s.18

Dec (center)	+46°32′42″.3
Dec (top/left)	+42°56′48″.5
Dec (top/right)	+49°32′25″.8
Dec (bottom/right)	+49°40′33″.7
Dec (bottom/left)	+43°04′10″.7

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Contrasting death of two stars: the supernova remnant SH2-221 and the giant planetary nebula SH2-216

Contrasting death of two stars: the supernova remnant SH2-221 and the giant planetary nebula SH2-216

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Contrasting death of two stars: the supernova remnant SH2-221 and the giant planetary nebula SH2-216

Contrasting death of two stars: the supernova remnant SH2-221 and the giant planetary nebula SH2-216

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