Pleiades (M45) - Second Try (JDJ)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: 16 Tau · 17 Tau · 18 Tau · 19 q Tau · 20 Tau · 21 Tau · 22 Tau · 23 Tau · 24 Tau · 25 eta Tau · 26 Tau · 27 Tau · 28 Tau · Alcyone · Asterope · Atlas · Celaeno · Electra · IC 349 · M 45 · Maia · Maia nebula · Merope · Merope nebula · NGC 1432 · NGC 1435 · Pleione · Sterope II · Taygeta · The star 18Tau · And 8 more.

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Pleiades (M45) - Second Try

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Pleiades (M45) - Second Try

This is my second attempt at an image of the Pleiades (M45) with the new APO refractor setup. This image has ~4 hrs integration time (about 2x my previous attempt) captured over three nights (December 5, 10, and 11, 2017). I tried to combine additional data sets but have had problems with the resulting stacks. Will keep working on this one, but this is a bit better than the first attempt.

M45 imaged with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer and Nikon D750. Stacked using DSS for a total integration time of ~4 hours using 120 sec subs at ISO 200. Subtracted darks, bias, and flats. Processed in Pixinsight: Cropped, gradient removal with DBE, Background Neutralization, Color Calibration, SCNR, stretched using Histogram Transformation Tool, Curves Transformation, HDR Multiscale Transform, ACDNR noise reduction, Color Calibration.

Cloudy Nights

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Status	Advanced success
Started	...
Astrometry.net job	2455298
PixInsight job	NNGFNRRW385V2CSZ79FFUPBQQMAOFH3O
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h46m43s.88
RA (top/left)	03h41m06s.86
RA (top/right)	03h44m17s.42
RA (bottom/right)	03h52m19s.41
RA (bottom/left)	03h49m15s.32

Dec (center)	+24°14′26″.6
Dec (top/left)	+24°58′20″.8
Dec (top/right)	+22°52′45″.9
Dec (bottom/right)	+23°29′45″.9
Dec (bottom/left)	+25°36′15″.2

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Pleiades (M45) - Second Try

Pleiades (M45) - Second Try

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Pleiades (M45) - Second Try

Pleiades (M45) - Second Try

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