SH2-64 (Don Curry)

Celestial hemisphere: Southern · Constellation: Serpens (Ser) · Contains: The star 60Ser

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SH2-64

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SH2-64

Westerhout 40 or W40 (also designated Sharpless 64, Sh2-64, or RCW 174) is a star-forming region in the Milky Way Galaxy in the constellation Serpens Cauda. The region has the appearance of a diffuse nebula that contains a cluster of several hundred young stars.[2][5][6] The distance to the region is 436±9 pc (1420±30 light-years),[1] making it one of the nearest sites of formation of high-mass O- and B-type stars.[7] However, it is highly obscured by its molecular cloud, and cannot easily be observed in visible wavelengths of light.[2][8] Ionizing radiation from the massive OB stars has created an H II region[9] which has an hour-glass morphology.[5]

Like all star-forming regions, W40 is made up of several components: the cluster of new-born stars and the gaseous material from which these stars form (the interstellar medium). Most of the gas is in the form of molecular clouds, the coldest, densest phase of the interstellar medium, which is made up of mostly molecular hydrogen (H2). However, feedback from the star cluster has ionized some of the gas and blown a bubble in the cloud around the cluster.

The final rendition had applications of star masks in the individual LRGB masters, along with LHE in the L channel with mask still enabled and this brought out much more inner detail once applied.

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Cloudy Nights

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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
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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
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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
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Public amaeteur data
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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.

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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.
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
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Astrometry.net job	1423352
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PixInsight queue size	n/a
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