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Contains:  IC 1396
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The Elephant's Trunk Nebula, within IC1396, 


            Steven Bellavia
The Elephant's Trunk Nebula, within IC1396

The Elephant's Trunk Nebula, within IC1396

Technical card

Resolution: 5320x3600

Dates:Oct. 12, 2018Oct. 13, 2018

Astronomik 6nm OIII: 17x300" (gain: 140.00) -15C bin 1x1
Optolong 7nm Ha 2": 14x300" (gain: 140.00) -15C bin 1x1

Integration: 2.6 hours

Darks: ~25

Avg. Moon age: 3.93 days

Avg. Moon phase: 16.67%

Bortle Dark-Sky Scale: 4.00

Temperature: 12.00 job: 2313264

RA center: 21h 36' 18"

DEC center: +57° 49' 40"

Pixel scale: 1.360 arcsec/pixel

Orientation: 181.175 degrees

Field radius: 1.213

Data source: Backyard


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 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 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.
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.



Steven Bellavia
License: None (All rights reserved)


  • The Elephant's Trunk Nebula, within IC1396, 


            Steven Bellavia
  • Final
    The Elephant's Trunk Nebula, within IC1396, 


            Steven Bellavia


I added more contrast and saturation. So not as "natural" not sure if I like it.

Sky plot

Sky plot


The Elephant's Trunk Nebula, within IC1396, 


            Steven Bellavia