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IC1396: Elephant Trunk Nebula in Cepheus

RA = 21h 39 min; Dec = +57 deg 30 min

Date & Site:

Imaged on 7/20/16; Carlsbad, CA

Conditions: 69 degrees; Full moon; calm; above average seeing


Telescope: Takahashi FSQ106N

Mount: Losmandy G-11 with Gemini

Camera: ST-10XME; CFW10; 60mm Astrotech Guidescope Astrodon 3nm Ha filter



Exposures: 5 hrs of Ha (15 minute subs) over two nights.

Imaged through a Hydrogen alpha filter permitting only light within a 3 nm bandwidth centered on a peak wavelength of 656.28 nm to reach the camera. This enables reasonable imaging during a full moon. Portrayed in native monochrome.

This image shows only a small portion of IC 1396 - a large emission nebula in Cepheus. The "elephant's trunk" is a cometary nebula - a band of dust and gas- being pushed away by radiation from a bright star near the top of the globule. Jets and particle winds emitted from this bright star radiate the ambient ionized hydrogen and dust.

FOV = 96 x 65 arc minutes

3,000 light years away

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