The Mysteries Of Caldwell's Cave (Caldwell 9) (estabrook)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD216380 · HD216425 · HD216532 · HD216629 · HD216658 · HD216711 · HD216898 · HD216926 · HD217035 · HD217061 · HD217086 · HD217099 · HD217297 · HD217312 · HD217463 · HD217657 · HD217730 · HD217872 · HD217966 · HD217979 · HD218066 · HD218139 · HD218342 · LBN 524 · LBN 527 · LBN 529 · LDN 1211 · LDN 1212 · LDN 1215 · LDN 1216 · And 3 more.

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The Mysteries Of Caldwell's Cave (Caldwell 9)

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The Mysteries Of Caldwell's Cave (Caldwell 9)

Patrick Moore's Caldwell Catalog has introduced me to a number of rewarding astrophotography targets, including the Iris Nebula (Caldwell 4, which I captured earlier this Spring) and this one, the Cave Nebula (Caldwell 9). I had been looking forward to capturing the Cave, and was pleased when it inched over my neighbor's rooftop in mid-June.

I devoted two nights to the project, combining broadband data from the Optolong L-Pro data with narrowband data from the Optolong L-eNhance filter. (The stars are exclusively broadband.)

I've seen others pull out more red gas on the periphery than I managed, and I was tempted to gather data for another night. But I was so pleased with range of colors, the balance of light and dark--and the Cave's eerie, alluring glow--that I decided to leave it as is.

(Captured: C6, AVX, Hyperstar, ASI183MC Pro, Optolong L-Pro and L-Enhance filters. Processed: AstroPixelProcessor, PixInsight, StarXterminator, NoiseXterminator)

Original
B
Final
C

B

Description: Just a little tweaking in PixInsight to enhance contrast and reduce noise.

Uploaded: ...

C

Description: ...And a little PixInsight dark structure enhancement.

Uploaded: ...

ZWO ASI183/QHY183
Light Polluted skies
Optolong L-Pro filter
Virginia Astronomers and Astrophotographers
HyperStar Lens Astrophotography
Optolong L-eNhance filter
NOVAC
The OSC Club (One Shot Camera)

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	Distinct awarded users	Total awarded images
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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	5907997
PixInsight job	H71KUE6Y5G5IZZPJMQJZWZNBKARNSOPX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h56m46s.68
RA (top/left)	22h45m42s.53
RA (top/right)	22h56m22s.58
RA (bottom/right)	23h08m17s.20
RA (bottom/left)	22h57m07s.38

Dec (center)	+62°38′03″.7
Dec (top/left)	+61°59′43″.2
Dec (top/right)	+64°04′05″.2
Dec (bottom/right)	+63°13′02″.10
Dec (bottom/left)	+61°12′05″.6

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The Mysteries Of Caldwell's Cave (Caldwell 9)

The Mysteries Of Caldwell's Cave (Caldwell 9)

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Image Index:

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The Mysteries Of Caldwell's Cave (Caldwell 9)

The Mysteries Of Caldwell's Cave (Caldwell 9)

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Acquisition details

Description

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C

Sky plot

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