LDN 1251 (Darius Kopriva)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 33 Cep) · The star Al Aghnam II (π Cep

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LDN 1251

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LDN 1251

LDN 1251 is a complex nebula in the constellation Cepheus, containing dark structures and faintly glowing / reflecting dust and gas. It’s nickname is the Rotten Fish Nebula. The acronym “LDN” refers to Lynd’s Catalogue of Dark Nebulae. This catalogue’s entries were identified by inspection of red and blue images from the National Geographic – Palomar Observatory Sky Atlas.

This type of object is sometimes referred to as a molecular cloud. LDN 1251 is quite close to us, at around 1,000 light years. It is part of a much large complex of bright and dark nebulae in this region of the sky. There are also galaxies far in the background. Near the left edge of the nebula is PGC69472, a spiral galaxy that reminds me a bit of M33. Numerous Herbig-Haro objects are associated with LDN 1251, and are visible as small patches of nebulosity associated with newly born stars.

Southern Hemisphere Astro

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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
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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 failed
Started	...
Astrometry.net job	6391313
PixInsight job	CP1L3388OQG5O3ECV8F4V3N3AP29JTY8
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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LDN 1251

LDN 1251

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LDN 1251

LDN 1251

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