IC1396 Elephant Trunk (Jerry Macon)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: B161 · IC 1396 · LBN 452 · LBN 455 · LDN · LDN 1099 · LDN 1105 · LDN 1110 · LDN 1111 · LDN 1112 · Sh2-131 · VdB142

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IC1396 Elephant Trunk

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IC1396 Elephant Trunk

The Elephant's Trunk nebula is a concentration of interstellar gas and dust within the much larger ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. The piece of the nebula shown here is the dark, dense globule IC 1396A; it is commonly called the Elephant's Trunk nebula because of its appearance at visible light wavelengths, where there is a dark patch with a bright, sinuous rim. The bright rim is the surface of the dense cloud that is being illuminated and ionized by a very bright, massive star (HD 206267) that is just to the east of IC 1396A. The entire IC 1396 region is ionized by the massive star, except for dense globules that can protect themselves from the star's harsh ultraviolet rays.

The Elephant's Trunk nebula is now thought to be a site of star formation, containing several very young (less than 100,000 yr) stars that were discovered in infrared images in 2003. Two older (but still young, a couple of million years, by the standards of stars, which live for billions of years) stars are present in a small, circular cavity in the head of the globule. Winds from these young stars may have emptied the cavity.

The combined action of the light from the massive star ionizing and compressing the rim of the cloud, and the wind from the young stars shifting gas from the center outward lead to very high compression in the Elephant's Trunk nebula. This pressure has triggered the current generation of protostars. (Wikipedia)

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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.
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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	...
PixInsight job	08KYZFW70IBFMH32L11IYH545YQCWQ3B
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h38m50s.79
RA (top/left)	21h34m48s.44
RA (top/right)	21h43m20s.35
RA (bottom/right)	21h42m59s.99
RA (bottom/left)	21h34m16s.17

Dec (center)	+57°43′00″.4
Dec (top/left)	+57°17′13″.2
Dec (top/right)	+57°22′37″.2
Dec (bottom/right)	+58°08′16″.7
Dec (bottom/left)	+58°02′48″.4

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