Elephant Trunk in RGB + SHO (Linwood Ferguson)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD205948 · HD239710 · LBN 451 · LBN 452 · LDN 1093 · LDN 1098 · LDN 1099 · LDN 1105

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Elephant Trunk in RGB + SHO

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Elephant Trunk in RGB + SHO

This is the Elephant in a pseudo Hubble pallet, with RGB stars. Its detail is from narrow band data of about 36 hours, but the colors are a combination with relatively brief (5.9 hours in 240s exposures) of RGB data, with yet more brief (1.4 hours of 30s exposures) RGB to give me star colors (and reduce bloating by very short exposures) after removing both longer exposure RGB and NB stars. It's also my first attempt with StarXTerminator.

This is taken at 2800mm from my backyard over about 75 days in 5 sessions trying to find windows between rain.

The actual colors came from using 3 times the RGB vs Narrow Band, but using all filters for a synthetic luminance (deconvolved) for detail. The broadband color did not so much alter the colors and add some shape to the darker areas in the NB data. SCNR was used at 0.6 to shift some green after combining.

Original
Final
B

B

Title: Elephant Trunk in RGB + SHO (version 2)

Description: This is similar to version 1 but reworked to better handle star removal and replacement (with many thanks to Russ at StarXTerminator). I also used the original stars, not the separately exposed one of the first time, as they had fairly good colors. I reduced them on re-introduction and then reduced again with the AstroSwell Star De-emphasizer. In this version I retained more of the Green.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	6330175
PixInsight job	GTZXHJLZS5CRD91LH99LJHO1QNVCAFAE
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h34m57s.631
RA (top/left)	21h37m28s.184
RA (top/right)	21h37m30s.374
RA (bottom/right)	21h32m25s.393
RA (bottom/left)	21h32m26s.878

Dec (center)	+57°29′53″.70
Dec (top/left)	+57°16′10″.27
Dec (top/right)	+57°43′19″.93
Dec (bottom/right)	+57°43′23″.54
Dec (bottom/left)	+57°16′14″.94

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Elephant Trunk in RGB + SHO

Elephant Trunk in RGB + SHO

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Elephant Trunk in RGB + SHO

Elephant Trunk in RGB + SHO

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