IC 1396 in LRGB (Björn)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: B161 · HD205196 · HD205510 · HD205948 · HD206081 · HD206267 · HD206482 · HD206773 · HD239710 · HD239712 · HD239724 · HD239727 · HD239729 · IC 1396 · LBN 451 · LBN 452 · LBN 455 · LDN · LDN 1093 · LDN 1096 · LDN 1098 · LDN 1099 · LDN 1102 · LDN 1105 · LDN 1110 · LDN 1111 · LDN 1112 · LDN 1124 · Sh2-131

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IC 1396 in LRGB

Revision title: Enhanced color contrast

Powered byPixInsight

IC 1396 in LRGB

Revision title: Enhanced color contrast

Again, this was a spontaneous imaging session. I checked the weather forecast and it predicted to be a clear night. Although this is starting to be the time of the year where fog might be a plague, possibly setting in at midnight, I was fortunate that it didn't bother me (the scope actually) at all.

Since I sent my narrowband filters in to the vendor for a check-up, I was left with the LRGB set. From my last wide-field image with my DSLR, I made a good experience with the multi-band pass IDAS LPS-D3 filter which I thought might be a good choice for this object as well as the filter is transmissive to all major emission lines. So, that's what I did. I’ve programmed the automated imaging session to capture about 80 to 90 minutes in each colour channel and put about 2.5h of L on top. I’ve miscalculated** the duration of the night and so my automated imaging sequence ended up collecting more R data than expected. However, it turned out that all channels produced sufficient data for a decent image.

Compared to the classical narrowband imaging, this image resembles the “true” colours of the Elephant trunk nebula quite accurately. I must admit that I start to prefer the natural colour look over artificial combinations from NB images.

I hope you enjoy!

Björn

* Besides pure exposure time, meridian flip, autofocus runs, dithering lead to additional non-productive time which can sometimes be quite a time consumer.

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Title: Enhanced color contrast

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Status	Advanced success
Started	...
Astrometry.net job	6254852
PixInsight job	7DYBHIQGHIBQ66V117HNHS7ZANV1CKQU
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h36m45s.86
RA (top/left)	21h42m28s.70
RA (top/right)	21h42m34s.79
RA (bottom/right)	21h30m50s.76
RA (bottom/left)	21h31m09s.64

Dec (center)	+57°37′26″.7
Dec (top/left)	+57°00′02″.9
Dec (top/right)	+58°14′52″.1
Dec (bottom/right)	+58°13′48″.8
Dec (bottom/left)	+56°59′03″.9

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IC 1396 in LRGB

Revision title: Enhanced color contrast

IC 1396 in LRGB

Revision title: Enhanced color contrast

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IC 1396 in LRGB

Revision title: Enhanced color contrast

IC 1396 in LRGB

Revision title: Enhanced color contrast

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