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Hemisphere:  Northern  ·  Contains:  IC 1396
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IC1396 Ha, 



    
        

            Sergiy_Vakulenko
IC1396 Ha
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IC1396 Ha

Technical card

Imaging telescopes or lenses: Skywatcher ED80

Imaging cameras: ATIK 383L+

Mounts: AZ-EQ6

Guiding telescopes or lenses: Orion thin OAG

Guiding cameras: QHYCCD QHY5

Focal reducers: Skywatcher .85x Focal Reducer & Corrector

Software: Main Sequence Software SGPro

Filters: Baader Ha 7nm 36mm

Accessory: DIY Focus controllers


Dates:Sept. 30, 2018

Frames: 48x900"

Integration: 12.0 hours

Avg. Moon age: 20.13 days

Avg. Moon phase: 70.83%


Basic astrometry details

Astrometry.net job: 3006663

RA center: 21h 37' 55"

DEC center: +57° 43' 22"

Pixel scale: 2.138 arcsec/pixel

Orientation: 265.118 degrees

Field radius: 1.230 degrees


Resolution: 2500x3300

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

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.
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Sergiy_Vakulenko
Sergiy_Vakulenko
License: Attribution Creative Commons
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    IC1396 Ha, 



    
        

            Sergiy_Vakulenko
    Original
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    B

B

Description: Starless version

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IC1396 Ha, 



    
        

            Sergiy_Vakulenko

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