SH2-235/233/231 | A Triplet of Small Emission Nebulae (Kevin Morefield)

Celestial hemisphere: Northern · Constellation: Auriga (Aur) · Contains: LBN 802 · LBN 803 · LBN 808 · PK173+02.1 · Sh2-231 · Sh2-233 · Sh2-235

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SH2-235/233/231 | A Triplet of Small Emission Nebulae

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SH2-235/233/231 | A Triplet of Small Emission Nebulae

The two larger objects in frame are SH2-235 and -231, but I think the smaller one in the upper left must be SH2-233, though the annotation looks off. These are connected to the much larger Sh2-232 off to the lower right out of frame. 232 is the normal target here but is far too large for my FOV. I had hoped to pull up some OIII to bring out a little blue as I had seen in a few other images. But I think the others may have used some SII or Ha to create blue color in the lower right nebule. Here, I've got the some yellow there which is really representing the Ha trumping the SII more than elsewhere.

The NB mix is SHO but the star color is from the narrowband data and comes mostly from an H-SO-O blend that I color balanced on the stars. With these purely Ha/SII nebulae some RGB stars really helps add some color - shame I didn't have any!

This data was captured in large part while I was in Antarctica hoping to see the eclipse. Since there was no hope of operating the telescope nightly while out at sea for 11 nights, I had to set CCDAP to run an identical sequnce each night. And I had to cover three different objects so it was not ideal. ACP would be a better solution for this kind of automated capture. Do you know of any other automation programs that can handle selecting different data on different nights based on availability?

Regarding the eclipse, we only saw the world darken dramtically from below clouds. It would have been fun to see the eclipse directly, especially because it started between 2 and 3 am! - but at least I got a picture of SH2-235!

Narrowband imaging
Sharpless2 Objects

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Status	Advanced success
Started	...
Astrometry.net job	5327555
PixInsight job	GQOA5TLY92XC36L0BSIBKJN9VH1LLENU
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h39m53s.769
RA (top/left)	05h37m39s.618
RA (top/right)	05h41m04s.510
RA (bottom/right)	05h42m08s.167
RA (bottom/left)	05h38m42s.308

Dec (center)	+35°50′27″.67
Dec (top/left)	+35°46′18″.60
Dec (top/right)	+35°27′00″.10
Dec (bottom/right)	+35°54′27″.92
Dec (bottom/left)	+36°13′52″.86

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SH2-235/233/231 | A Triplet of Small Emission Nebulae

SH2-235/233/231 | A Triplet of Small Emission Nebulae

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SH2-235/233/231 | A Triplet of Small Emission Nebulae

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