M31 in Ha

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda galaxy · Great Nebula in Andromeda · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 221 · NGC 224

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M31 in Ha

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M31 in Ha

Imaged the Andromeda Galaxy (M31) on the nights of November 10, 12 & 15, 2019 using an Optolong Lenhance dual narrowband filter. This image is the R channel with the H-alpha data. Will be using the Ha data to generate a NBRGB image in combination with RGB data taken with an LPSD1 filter.

Imaged with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, Optolong Lenhance dual narrowband filter, and full spectrum modified Nikon D5300.

Pre-processed using PixInsight Batch Pre-Processing (BPP) script. Images calibrated using darks, bias, and flats. Extracted red/green/blue channels using BatchChannelExtraction script. Registered and stacked using StarAlighment and Integration. Total integration time of ~6 hours using 58 subs at ISO400x360 sec. Post-processed in Pixinsight: Cropped, gradient removal with ABE, MLT for noise reduction, stretched using STF settings in Histogram Transformation Tool, Curves Transformation, TGVDenoise for noise reduction, HDR transform, Local histogram transform.

The refractors!
Cloudy Nights
DSLR narrowband
Suburban Astrophotography
The OSC Club (One Shot Camera)

Galaxies

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	3090409
PixInsight job	IGQSP861XMGJQLGH8XRVMZL4TMPMT2M2
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h42m43s.17
RA (top/left)	00h36m48s.18
RA (top/right)	00h38m49s.55
RA (bottom/right)	00h48m23s.73
RA (bottom/left)	00h46m48s.80

Dec (center)	+41°14′06″.0
Dec (top/left)	+42°36′24″.4
Dec (top/right)	+39°38′20″.3
Dec (bottom/right)	+39°50′45″.1
Dec (bottom/left)	+42°49′13″.3

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M31 in Ha

M31 in Ha

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M31 in Ha

M31 in Ha

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