Sh2-155/Caldwell 9, The Cave Nebula (Rob Foster)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD216425 · HD216532 · HD216629 · HD216658 · HD216711 · HD216898 · HD217035 · HD217061 · HD217086 · HD217099 · HD217312 · HD217463 · HD217657 · HD217966 · HD218229 · LBN 524 · LBN 527 · LBN 529 · LDN 1215 · LDN 1216 · LDN 1218 · Sh2-155

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Sh2-155/Caldwell 9, The Cave Nebula

Revision title: Cave Nebula (no drizzle)

Powered byPixInsight

Sh2-155/Caldwell 9, The Cave Nebula

Revision title: Cave Nebula (no drizzle)

Two full nights of dark sky imaging combining 2 and 5 minute subs helped to bring out the dim Cave Nebula using a modified DSLR. This was the first processing effort with WBPP 2.5 with integrated drizzle, though I upscaled the drizzle to 2; not sure I needed to do that as it now defaults to a scale of 1. I'll repeat WBPP 2.5 using the default drizzle scale of 1, though I did change the drop size to 0.85 and to kernel shape to Gaussian. Taking cues from so many excellent astrophotographers on Astrobin, I am learning that less is more, meaning shooting fewer targets but capturing much more signal for a given target. At 11.5 hours of total integration, I am trying to wring what I can out of this DSLR setup before upgrading to a dedicated astro camera.

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Final
B

B

Title: Cave Nebula (no drizzle)

Description: Same WBPP settings, but used the undrizzled master and for some reason the colors were better and easier to work with, though the stars not as nice (zoomed in).

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Status	Advanced success
Started	...
Astrometry.net job	6292822
PixInsight job	PC7IHDMJF3VWHXL7D5WIO3GSU5C9P6IV
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h57m43s.37
RA (top/left)	23h06m23s.62
RA (top/right)	22h49m11s.89
RA (bottom/right)	22h49m25s.00
RA (bottom/left)	23h05m53s.52

Dec (center)	+62°36′29″.0
Dec (top/left)	+63°11′51″.2
Dec (top/right)	+63°13′32″.6
Dec (bottom/right)	+61°59′12″.9
Dec (bottom/left)	+61°57′33″.7

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Sh2-155/Caldwell 9, The Cave Nebula

Revision title: Cave Nebula (no drizzle)

Sh2-155/Caldwell 9, The Cave Nebula

Revision title: Cave Nebula (no drizzle)

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Sh2-155/Caldwell 9, The Cave Nebula

Revision title: Cave Nebula (no drizzle)

Sh2-155/Caldwell 9, The Cave Nebula

Revision title: Cave Nebula (no drizzle)

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