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Tuesday, December 25, 2012
Have planned to shoot this detail for years. A pillar like formation at the North East corner of the IC 1805, the Heart Nebula. This is a very dim target, there is 8h of h-alpha emission captured and it's at a limit to be enough to show this object.
An unnamed object in IC 1805
Ra 02h 39m 43s Dec +61° 54′ 04″ Image is shot at 21.12.2012
Colors are mapped to a HST-palette, R=Sulfur, G=Hydrogen and B=Oxygen
An experimental starless image
This image shows just the nebulosity
Image in visual colors
Orientation in IC 1805
A two frame mosaic
This target was partly overlapping with my previous imaging project in IC 1805,
the Melotte 15, so I was able to build a two frame mosaic.
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera 8Hz
Image Scale, ~0,8 arc-seconds/pixel
24 x 1200s exposures for the H-alpha, emission of ionized Hydrogen = 8h
Narrowband cahnnels for ionized Oxygen and Sulfur are taken from an older wide field image.
A single 20 min. exposure
Image is just calibrated, linearly stretched and scaled down.