M51 in NBRGB (JDJ)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 4263 · IC 4278 · M 51 · NGC 5169 · NGC 5173 · NGC 5194 · NGC 5195 · NGC 5198 · Whirlpool galaxy

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M51 in NBRGB

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M51 in NBRGB

Imaged M51, the Whirlpool Galaxy, this past spring from my red zone backyard 10 miles north of Washington DC using IDAS LPS-D1 filter for RGB data and Optolong 12nm Ha filter for NB data.

NBRBG image generated from OSC RGB data and H-alpha NB data using the Pixinsight NBRGB combination script. Red was augmented by H-alpha data with a scale factor of 0.3.

Ha data: https://astrob.in/tuf7bn/0/

Imaged on May 18, 2019 with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, Optolong 12nm H-alpha Filter, and full spectrum modified Nikon D5300.

OSC data: https://astrob.in/5mzpmc/B/

Imaged on May 6/20/21, 2019 with WO GT81 at F4.7 (382 mm focal length) using Flat6A II field flattener/0.8x reducer, IDAS LPS D1 Clip Filter, and full spectrum modified Nikon D5300

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

Galaxies

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	2957766
PixInsight job	P2689P0GCF1CTU2XGRYGGP31SYO4N8XA
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	13h29m58s.80
RA (top/left)	13h26m50s.18
RA (top/right)	13h27m02s.32
RA (bottom/right)	13h33m02s.65
RA (bottom/left)	13h33m00s.30

Dec (center)	+47°11′20″.8
Dec (top/left)	+47°52′46″.8
Dec (top/right)	+46°28′42″.5
Dec (bottom/right)	+46°29′34″.1
Dec (bottom/left)	+47°53′42″.6

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M51 in NBRGB

M51 in NBRGB

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M51 in NBRGB

M51 in NBRGB

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