Sh2-290 - Abell 31 - PK 219+31.1 in HOO/RGB (Uwe Deutermann)

Celestial hemisphere: Northern · Constellation: Cancer (Cnc) · Contains: IC 523 · PK219+31.1 · Sh2-290

Sh2-290 - Abell 31 - PK 219+31.1 in HOO/RGB

I spent some time on this wonderful PN (always a fan of them!), took Frank Breslawski's image as an inspiration. With this image I was especially happy about the integration of the HOO and RGB (star) data, turned out pretty well. The narrow band data were pretty faint (even at 10 minute exposure time!), so it took me a while to get them to show up bright enough, which usually costs a bit in factor of being a "clean" image. I also did not want to overdo it, hence it is still a little bit faint.

Also interesting was that my High Speed filter in Hα gave much better results than the 7nm Baader Hα filter. I just wonder now if I would use a 3nm filter if I would see any signal with a 5" refractor. I see images here that show that you can, but that might be in darker areas, although it should not matter with such a narrow band.

The overall image has an eccentricity value of 0.35 (multi star guiding in PHD!) and median FWHM of 3.56.

Original
B
C
Final
D

B

Description: Annotated image.

Uploaded: ...

C

Description: The tick brighter version as Rodd suggested, and if he suggests something one should look into it 😊.

Uploaded: ...

D

Description: A little notch in brightness

Uploaded: ...

ZWO ASI1600MM/QHY163M
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Status	Advanced success
Started	...
Astrometry.net job	5259673
PixInsight job	HDNN6QA1YFKIPJ5MNZ7EF7S21TN37W99
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	08h54m15s.705
RA (top/left)	08h55m36s.649
RA (top/right)	08h55m17s.117
RA (bottom/right)	08h52m54s.585
RA (bottom/left)	08h53m14s.449

Dec (center)	+08°54′20″.47
Dec (top/left)	+08°31′58″.91
Dec (top/right)	+09°20′14″.17
Dec (bottom/right)	+09°16′40″.69
Dec (bottom/left)	+08°28′26″.37

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Sh2-290 - Abell 31 - PK 219+31.1 in HOO/RGB

Sh2-290 - Abell 31 - PK 219+31.1 in HOO/RGB

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Sh2-290 - Abell 31 - PK 219+31.1 in HOO/RGB

Sh2-290 - Abell 31 - PK 219+31.1 in HOO/RGB

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