NGC 3718 & 3729 a nice pair (John Favalessa)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 3718 · NGC 3729 · PGC 2421869 · PGC 2423714 · PGC 2425719 · PGC 2431209 · PGC 2432523 · PGC 2432563 · PGC 2434871 · PGC 2437341 · PGC 2439126 · PGC 2440787 · PGC 2441470 · PGC 35609 · PGC 35615 · PGC 35618 · PGC 35620 · PGC 35631

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NGC 3718 & 3729 a nice pair

Powered byPixInsight

NGC 3718 & 3729 a nice pair

NGC 3718 has become one of my favorite galaxies. I'll have to study "what happened" to form this. Then what's going on just to the left of NGC3718? that is PGC35620 & 35618

So I have good data taken 2 nights from Mt Pinos 85 miles north of LA at 8,300', class 3, new moon, cold and low moisture.

Lum - 45 x 300s

RGB - 22 x 300s each

LeXtreme Ha & Oiii 25 x 300s

New at mono camera and LRGB filters. I integrated in APP, and used its many different methods to combine: RGB1, RGB2, LRGB1, HaRGB, HaRGB2, HaLRGB methodologies. I also combined in Pixinsight using linear ChannelCombination and non linear RGBCombination and then added Ha with the NBRGB Combination script. Just these were 4+ gigs!

I had so many different versions, clones on clones, linearFit on different channels, on and on. I kind of forget what this posted image's methodology is, but my best memory is Pix linear ChannelCombination with green as the linearFit basis. I had to manually align the color channels in Histogram stretch. Interestingly, the color clearly changes depending on the method and all methods produced usable results. This mono LRGB is turning into a full time job...a job which I like so far, but I must get more efficient.

I appreciate any and all comments, critique and suggestions. CS on the new moon!

Final
Original
B

B

Description: In this version I used APP's LHaRGB1 combination algorithm. (In the "final" I used Pix ChannelCombination.) Like I said, different methods brought out different color. I was up on a mountain when processing and couldn't use Pix's PhotoMetricColorCal.

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Status	Advanced success
Started	...
Astrometry.net job	4413809
PixInsight job	YQTY7I2ZDR0E6YQZCEH9A1EO5RLND83L
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h32m52s.42
RA (top/left)	11h35m06s.58
RA (top/right)	11h34m47s.54
RA (bottom/right)	11h30m36s.24
RA (bottom/left)	11h30m59s.43

Dec (center)	+53°05′43″.6
Dec (top/left)	+52°45′07″.3
Dec (top/right)	+53°28′55″.4
Dec (bottom/right)	+53°26′12″.2
Dec (bottom/left)	+52°42′26″.1

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NGC 3718 & 3729 a nice pair

NGC 3718 & 3729 a nice pair

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NGC 3718 & 3729 a nice pair

NGC 3718 & 3729 a nice pair

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