M31 at 85mm (JDJ)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: 20 pi. Cas · 26 And · 27 rho And · 32 And · 35 nu. And · 37 mu. And · 39 And · 41 And · Andromeda · Andromeda Galaxy · IC 1550 · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 218 · NGC 224 · NGC 272 · NGC 317 · Part of the constellation Andromeda (And) · R And · The star 32And · The star 39And · The star 41And · The star μAnd · The star νAnd · The star πCas · The star ρAnd

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M31 at 85mm

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M31 at 85mm

This widefield image of the Andromeda Galaxy (M31) was taken on the night of November 11, 2020. I decided to take advantage of a string of clear nights with little interference from the Moon to image M31 at a couple different focal lengths. This first image was from a short session with an 85 mm focal length lens. I plan to see if I can improve this with some narrowband data shot with this lens through a dual-narrowband filter previously.

Imaged with 85mm/F1.4 Rokinon at F/2, IDAS LPS-D1 Clip Filter, and full spectrum modified Nikon D5300.

Total integration time was ~1.5 hours using 51 subs at ISO200 x 120 sec. Pre-processed using PixInsight Batch Pre-Processing (BPP) script. Images calibrated using darks, bias, and flats. Image integration performed using Image Integration process. Post-processed in Pixinsight: Cropped, gradient removal with ABE, MLT for noise reduction, stretched using Histogram Transformation with parameters for STF, Curves adjustment, TGVDenoise for noise reduction, Local histogram transform, Morphological transformation to shrink starts, and final black point adjustment using Histogram transformation.

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B

Description: NBRGB version generated using ~4 hrs of narrowband Ha and OIII data taken using dual narrowband filter

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Status	Advanced success
Started	...
Astrometry.net job	4030886
PixInsight job	WPYEHO0JXBNF2NCC4R5IYSFPBF39OZ1J
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h42m49s.11
RA (top/left)	00h14m02s.72
RA (top/right)	00h21m16s.27
RA (bottom/right)	01h07m06s.80
RA (bottom/left)	01h08m41s.42

Dec (center)	+41°16′46″.4
Dec (top/left)	+46°36′19″.7
Dec (top/right)	+35°10′32″.6
Dec (bottom/right)	+35°34′17″.1
Dec (bottom/left)	+47°04′41″.5

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M31 at 85mm

M31 at 85mm

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M31 at 85mm

M31 at 85mm

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