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Contains:  IC 1396, The star Garnet Star (μCep)
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Elephant's Trunk nebula - IC1396 (HaRGB), 





    
        

            Prabhakar
Elephant's Trunk nebula - IC1396 (HaRGB)

Elephant's Trunk nebula - IC1396 (HaRGB)

Technical card

Imaging telescope or lens:Takahashi FSQ85

Imaging camera:QSI683wsg

Mount:Orion Atlas EQ-G + EQDIR

Guiding telescope or lens:Takahashi FSQ85

Guiding camera:Lodestar

Software:Photo ShopStartools 1.3.5

Filter:Astrodon LRGB Tru-Balance E-series Gen II

Resolution: 1633x1221

Dates:July 10, 2015

Frames: 36x600"

Integration: 6.0 hours

Avg. Moon age: 23.90 days

Avg. Moon phase: 31.77%

Astrometry.net job: 832118

RA center: 324.890 degrees

DEC center: 57.699 degrees

Pixel scale: 4.942 arcsec/pixel

Orientation: -92.243 degrees

Field radius: 1.400 degrees

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 west 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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Imaged from South Florida.

A and B - RGB version
C - Ha Version (20x10 mins)
D - HaRGB

Comments

Author

neomonks
Prabhakar
License: Attribution Creative Commons
7480
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Revisions

  • Elephant's Trunk nebula - IC1396 (HaRGB), 





    
        

            Prabhakar
    Original
  • Elephant's Trunk nebula - IC1396 (HaRGB), 





    
        

            Prabhakar
    B
  • Elephant's Trunk nebula - IC1396 (HaRGB), 





    
        

            Prabhakar
    C
  • Final
    Elephant's Trunk nebula - IC1396 (HaRGB), 





    
        

            Prabhakar
    D

Sky plot

Sky plot

Histogram

Elephant's Trunk nebula - IC1396 (HaRGB), 





    
        

            Prabhakar