IC1396 (Elephant Trunk Nebula, wide field) (José Manuel López Arlandis)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: IC 1396 · The star 13Cep · The star Garnet Star (μCep)

IC1396 (Elephant Trunk Nebula, wide field), José Manuel López Arlandis

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IC1396 (Elephant Trunk Nebula, wide field)

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IC1396 (Elephant Trunk Nebula, wide field)

IC1396 is one of the largest emission nebulae in the northern sky (angular size 3°). It is illuminated by the massive star HD206267 (SAO33626), located in the center. It is a triple star system of magnitude 5.7, whose stellar wind is extremely fast, ionizing and compressing the surrounding gas. All three components are massive stars, and the intense ultraviolet radiation they emit, ionizes IC 1396's gas and causes the compression of the nebula's denser globules, leading to star formation. IC1396 contains:
- The H2 region (emission nebula).
- The central open star cluster (Cr 439).
- The formation known as “Elephant Trunk” (IC1396A). It is a cold molecular cloud, a column of non-ionized gas. At 8:30 in the photo.
- Inside the Elephant Trunk there is a small reflection nebula (barely noticeable in the image), cataloged as vdB 142, which is illuminated by the star HD 239710, a blue star of spectral type B and apparent magnitude 9.4 . It is at the end of the "trunk".ube.
- The dark nebula Barnard 161 (B161). In the photograph, it is located at 5:30 h.

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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
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Astrometry.net job	5423754
PixInsight job	n/a
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IC1396 (Elephant Trunk Nebula, wide field)

IC1396 (Elephant Trunk Nebula, wide field)

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IC1396 (Elephant Trunk Nebula, wide field)

IC1396 (Elephant Trunk Nebula, wide field)

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