The Ghost of Cassiopiea (Patrick Prokop)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 59 · IC 63 · The star Navi (γCas)

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The Ghost of Cassiopiea

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The Ghost of Cassiopiea

The ghost of Cassiopeia ... IC 63
This is the Hydrogen Alpha view ...

It is about 550 light-years away and is within the constellation of Cassiopeia.
With the help of your imagination can see all kinds of shapes and figures. This nebula has flowing veils of gas and dust that have earned it the nickname "Ghost Nebula."
The colors in the eerie nebula showcase how the nebula is affected by the powerful radiation from the distant star. The hydrogen within IC 63 is being bombarded with ultraviolet radiation from Gamma Cassiopeia, causing its electrons to gain energy which they later release as hydrogen-alpha radiation — visible in golden-orange in this image.

I have difficulty with the bright star Gamma Cassiopeia 'flaring out' in the image ... being much brighter than the nebulosity around it.

Equipment:
Telescope: Orion EON130mm Triplet Refractor
Field reducer: Orion 0.8x for the EON 130
Focal ratio: f/5.6
Camera: ZWO ASI 1600mm Pro (monochrome)
Subframes: 5 minutes each except Green (3mn)
Filters:
- Hydrogen Alpha (7nm) ... 2hr 35min
- Oxygen 3 (7nm) ...1hr 40min
- Sulfur 2 (7nm) ... 1hr 05min
- Green (broadband) 1h 30mn
Total integration time: 6hr 50mn
Camera Gain ... sensor temp: 139 ... -10°C
Mount: SkyWatcher EQ6-R Pro
Capture Software: N.I.N.A. Version 11.1 nightly build
Guiding: PHD2
Stacking: Deep SkyStacker
Post-processing: PixInsight and Photoshop CC

N.I.N.A. Users

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
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	Basic success
Started	...
Astrometry.net job	5135502
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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The Ghost of Cassiopiea

The Ghost of Cassiopiea

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The Ghost of Cassiopiea

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