The Elephant’s Trunk Nebula, IC1396 – Detail

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The Elephant’s Trunk Nebula is a concentration of interstellar gas and dust that emits in multiple wavelengths. It can be located in the Cepheus constellation some 2,400 light years away from Earth.

The main structure shown in this image is known as the Elephant’s Trunk Nebula, IC 1396, an amazing 20 light-years long emission nebulae.

This image shows the Hα, [OIII] and [SII] emissions combined using the Hubble Palette composition. This inter5national color convention highlights the emissions from this nebula in different colors as it follows: the sulfur data is assigned to the red channel, the hydrogen data to the green channel and the oxygen data to the blue channel.

Broadband filters have been used to give the stars its natural color.

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​ HD image.

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Image Details

Hα: 36×300″
[OIII]: 28×300″
[SII]: 17×300″
RGB: (8,30,30)x120″

All images at 120Gain -15ºC bin2
Calibrated with 50 flats, 50 darks, 50 bias

Total exposure: 9h01′

Average darkness: 21 mag/arcsec2

Image resolution: 2.12”/pixel


FSQ85ED telescope

Mesu200 mount

ASI294MM Pro camera with ZWO EFW 8 pos

Guiding with ASI174MC and ZWO OAG

Baader filters



Aleix Roig, July 2021.
Prades (Tarragona, Catalonia – Spain).

Additional information

Image use

Non-commercial use, Commercial Use