The California Nebula - NGC 1499 - full size - in Ha - two panel mosaic (Simon)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 46 ksi Per · California nebula · HD24747 · HD25152 · HD25538 · HD275959 · HD279146 · HD279156 · HD279215 · HD279216 · HD279217 · HD279218 · HD279219 · HD279221 · HD279222 · HD279223 · HD279224 · HD279225 · HD279226 · HD279228 · HD279229 · HD279232 · HD279233 · HD279234 · HD279238 · HD279239 · HD279240 · HD279241 · HD279277 · HD279278 · And 58 more.

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The California Nebula - NGC 1499 - full size - in Ha - two panel mosaic

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The California Nebula - NGC 1499 - full size - in Ha - two panel mosaic

This is my first ever mosaic and it comprises of two panels of 20 subs each, at 12 minutes, 720 seconds, long exposure time. The integration length was a total of 8 hours. What was surprising was that on the second night for the top section, the data was worse, which I am sure was partly to do with the nearly full moon that really was quite close to the object. This meant that I was unable to stretch the image as far as I could have done because the top section's data would not have handled it, and would have become distorted in the process. [If one looks at the previous bottom section of this object that I took, they will see that the fainter nebulosity is more noticeable compared to this one, for this very reason]. Either way, I am very happy with the result. I used my 3" triplet for this and the Atik 460EX monochrome. Interestingly there is a faint galaxy in here! It is the tiny IC2005 at 0.35'x 0.25' and is at magnitude 15.7...

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Status	Advanced success
Started	...
Astrometry.net job	1804042
PixInsight job	246XP64YRCZIVTSFLO4STO3J32F64SB3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h01m41s.96
RA (top/left)	03h56m32s.64
RA (top/right)	03h57m17s.70
RA (bottom/right)	04h06m42s.20
RA (bottom/left)	04h06m16s.36

Dec (center)	+36°24′19″.6
Dec (top/left)	+37°19′03″.3
Dec (top/right)	+35°21′57″.8
Dec (bottom/right)	+35°29′09″.2
Dec (bottom/left)	+37°26′07″.1

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The California Nebula - NGC 1499 - full size - in Ha - two panel mosaic

The California Nebula - NGC 1499 - full size - in Ha - two panel mosaic

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The California Nebula - NGC 1499 - full size - in Ha - two panel mosaic

The California Nebula - NGC 1499 - full size - in Ha - two panel mosaic

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