IC434 - RASA and 6" Achromat Hα comparison - Final image with 6" refractor PLRGB (Uwe Deutermann)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: B33 · Flame Nebula · Horsehead nebula · IC 434 · NGC 2023 · Orion B · Sh2-277

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IC434 - RASA and 6" Achromat Hα comparison - Final image with 6" refractor PLRGB

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IC434 - RASA and 6" Achromat Hα comparison - Final image with 6" refractor PLRGB

Was curious what a comparison between the RASA 8 and the 6 inch achromat looks like. Chose the Horse Head. Same exposure times, same amount of images as well. Both images are STF stretched versions of stacked images. I expected of course that the 1200mm of the 6 inch scope results in much sharper details and point stars, a little bit disappointed about the RASA image when compared, but maybe I should not be, to blow up a 400mm focal length to the 1200mm image is a bit unfair. Still interesting to see.

B

Description: Closeup

Uploaded: ...

C

Description: And finally, the processed Hα image of the Horsehead with the 6".

Uploaded: ...

D

Description: Gathered last night some SII data and combined them with the Hα as H-HS-S before I will get some OIII and RGB data as well. The SII data were not as "clean" as the Hα data, wonder a bit why, maybe the moon?!

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E

Description: And here a final image with the 6" refractor in PLRGB. I did not get enough OIII data, will try to get some more and reprocess, but for now I am ok with the current final result.

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	4045170
PixInsight job	MNZGPE2V9JLFRMZZ2NA3BSADJ25Q68QE
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h41m03s.962
RA (top/left)	05h39m03s.146
RA (top/right)	05h40m44s.979
RA (bottom/right)	05h43m04s.786
RA (bottom/left)	05h41m22s.930

Dec (center)	-02°27′27″.62
Dec (top/left)	-02°31′23″.10
Dec (top/right)	-02°57′31″.14
Dec (bottom/right)	-02°23′31″.29
Dec (bottom/left)	-01°57′23″.80

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IC434 - RASA and 6" Achromat Hα comparison - Final image with 6" refractor PLRGB

IC434 - RASA and 6" Achromat Hα comparison - Final image with 6" refractor PLRGB

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IC434 - RASA and 6" Achromat Hα comparison - Final image with 6" refractor PLRGB

IC434 - RASA and 6" Achromat Hα comparison - Final image with 6" refractor PLRGB

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