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IC 1396



IC 1396: Elephant's Trunk- Dark Nebula in Cepheus

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

Date & Site:

Imaged on 7/22/17; Palomar Mountain, CA

Conditions: temps in the upper 60's; calm; very good seeing


Telescope: TEC 140 Refractor, 980mm at f/7

Guider: Hutech OAG-5 with SBIG guidehead

Mount: AP 1100 CP3
Camera: ST-10XME; CFW10; Astrodon 3nm Ha, OIII, and SII narrowband filters


Exposures: 60 minutes each (15 minute subexposures) of Ha, OIII, and SII for total of 3 hours

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.

In this image, atomic hydrogen is mapped to blue.

3,000 light years away

(image reduced to 60% of original size)

FOV = 52 x 35 arc minutes

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