IC342 - The Hidden Galaxy (Mau_Bard)

Celestial hemisphere: Northern · Constellation: Camelopardalis (Cam) · Contains: IC 342 · PGC 13693 · PGC 165371 · PGC 166074 · PGC 166076 · PGC 166077 · PGC 166480 · PGC 166861 · PGC 2706070

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IC342 - The Hidden Galaxy

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IC342 - The Hidden Galaxy

IC 342 (also known as Caldwell 5) is an intermediate spiral galaxy in the constellation Camelopardalis, located relatively close to the Milky Way. Despite its size and actual brightness, its location behind dusty areas near the galactic equator makes it difficult to observe, leading to the nickname "The Hidden Galaxy", though it can readily be detected even with binoculars. If the galaxy were not obscured, it would be visible by naked eye. The dust makes it difficult to determine its precise distance; modern estimates range from about 7 million light-years (Mly) to about 11 Mly. The galaxy was discovered by William Frederick Denning in 1892. It is one of the brightest in the IC 342/Maffei Group, one of the closest galaxy groups to the Local Group. Edwin Hubble first thought it to be in the Local Group, but it was later determined not to be a member.

In 1935, Harlow Shapley found that it was wider than the full moon, and by angular size the third-largest spiral galaxy then known, smaller only than the Andromeda Galaxy (M31) and the Triangulum Galaxy (M33). Modern estimates are more conservative, giving the apparent size as one-half to two-thirds the diameter of the full moon).

The galaxy has a diameter of 75,000 light-years.

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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	Advanced success
Started	...
Astrometry.net job	5907801
PixInsight job	AKUTLKSRDFEI8N897N573O0U459WBRB4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	03h46m49s.544
RA (top/left)	03h41m58s.966
RA (top/right)	03h51m39s.144
RA (bottom/right)	03h51m49s.185
RA (bottom/left)	03h41m50s.819

Dec (center)	+68°05′55″.74
Dec (top/left)	+67°44′09″.30
Dec (top/right)	+67°44′02″.70
Dec (bottom/right)	+68°27′08″.27
Dec (bottom/left)	+68°27′16″.40

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IC342 - The Hidden Galaxy

IC342 - The Hidden Galaxy

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IC342 - The Hidden Galaxy

IC342 - The Hidden Galaxy

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