IC1795 Fish Head Nebula (Joe Niemeyer)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1795 · NGC 896

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IC1795 Fish Head Nebula

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IC1795 Fish Head Nebula

Here is my image of the Fish Head Nebula (catalog IC 1795). It is part of a huge star forming system of gas and dust located along the Perseus spiral arm of our Milky Way galaxy. Located in the constellation Cassiopeia, it is approximately 6000 light-years from Earth and next to the much larger Heart Nebula, which will be the subject of my next astro image. This big fish is about 70 light-years long. The bright mouth of the fish head is designated NGC 896 and is the home to many massive, young stars. They radiate ultraviolet light which excites the surrounding hydrogen gas resulting in the colorful red hues characteristic of emission nebulae. This nebula also features huge lanes of dark, obscuring dust at the gills and to the left side of the head.

Sorry, I cannot look at this image without singing the Fish Heads song: "Fish heads, fish heads, Roly poly fish heads, Fish heads, fish heads, Eat them up, yum." (Barnes & Barnes, 1978 ).

I made this image from 33 300-second exposures through my Baader dual-bandpass filter (Hα and OIII) at 1630mm focal length, calibrated with 20 each dark, flat, and dark flat frames. I stacked the frames with Astro Pixel Processor and post-processed with Photoshop utilizing the StarXTerminator, Astronomy Tools, and Topaz DeNoise AI plugins.

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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	5351195
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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IC1795 Fish Head Nebula

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