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Saturday, October 17, 2015

Elephant's Trunk Nebula in the IC 1396

New image of the IC 1396. I got this ready at October 7, just before I went to the Panhellenic Conference of Astronomy in Sparta, Greece.

Elephant's Trunk Nebula
Please, click for a large image

Image in mapped colors from the light emitted by ionized elements. 
Red=Sulfur, Green=Hydrogen and Blue=Oxygen.

A closeup
Please, click for a large image


The elephant's Trunk nebula is a concentration of interstellar gas and dust in the star cluster IC 1396.
This ionized gas region locates in the constellation Cepheus about 2400 light years away.
This about twenty light years long formation is coursed by a stellar wind, radiation pressure, from a group of massive young stars. 

An experimental starless image
Please, click for a large image

A starless version of the photo makes easier to see the actual nebula.

A pareidolia fun...

A gargoyle of the sky

An older wide field photo of the IC 1396 emission nebula.
Please, click for a large image

Elephant's Trunk Nebula at six o'clock position in this image from Autumn 2011, more info can be found HERE

Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 21 iterations, added at 25% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f7 with 0,7 focal reducer for Edge HD 1100 telescope

10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x2 and SXV-AOL

Astrodon filter, 5nm H-alpha
Astrodon filter, 3nm O-III
Astrodon filter, 3nm S-II

Exposure times
H-alpha, 12 x 1200s = 4h
O-III, 4 x 1200s binned = 1h 20min.
S-II,  3 x 1200s = 1h 
Total 6h 20min.

Color channels, H-a, S-II and O-III

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