NGC1499 - Sh2-220 - California Nebula in HaRGB - 2 Panel Mosaic (Uwe Deutermann)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 46 ksi Per · California nebula · IC 2005 · IC 2027 · Menkib · NGC 1499 · Sh2-220 · The star ξPer

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NGC1499 - Sh2-220 - California Nebula in HaRGB - 2 Panel Mosaic

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NGC1499 - Sh2-220 - California Nebula in HaRGB - 2 Panel Mosaic

This target gave me a LOT of head aches. It is too big even for the 8" RASA, hence I needed a 2 panel mosaic, which is always quite painful. Then for some reason the star alignments between the Rasa and the Z61 did not work out very well, there were quite some shifts, and last but not least, the OIII data were so bad that I decided not to use them. I noticed (lately) that the OIII data have an enormous gradient in them, and when you try to stitch those together, well ... good luck. When comparing OIII data from other targets I do see a pattern, which should be possible to eliminate them with some good flats, but that does not seem to work either. Have to look more into this one. SII data are still in the making, they do look better, let's see if I can use them without OIII data, I might take the blue channel from the OSC via Z61.

Narrowband imaging
Sharpless2 Objects
Celestron RASA
AstroBin Platform open discussions community forum
ZWO ASI1600MM/QHY163M

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Status	Advanced success
Started	...
Astrometry.net job	3090225
PixInsight job	OZEAOITWHJVSIOWCJVYB0Q05JPKABGKQ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	04h01m10s.86
RA (top/left)	04h09m39s.31
RA (top/right)	03h53m49s.62
RA (bottom/right)	03h52m52s.66
RA (bottom/left)	04h08m17s.20

Dec (center)	+36°12′13″.1
Dec (top/left)	+37°11′15″.8
Dec (top/right)	+37°31′17″.0
Dec (bottom/right)	+35°10′10″.4
Dec (bottom/left)	+34°51′54″.3

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NGC1499 - Sh2-220 - California Nebula in HaRGB - 2 Panel Mosaic

NGC1499 - Sh2-220 - California Nebula in HaRGB - 2 Panel Mosaic

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NGC1499 - Sh2-220 - California Nebula in HaRGB - 2 Panel Mosaic

NGC1499 - Sh2-220 - California Nebula in HaRGB - 2 Panel Mosaic

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