Whirlpool Galaxy (M51) - RASA 11" ( Dan Gallo )

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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Whirlpool Galaxy (M51) - RASA 11"

Powered byPixInsight

Whirlpool Galaxy (M51) - RASA 11"

Imaging Telescopes Or Lenses: Celestron Rowe-Ackermann Schmidt Astrograph 11"
Imaging Cameras: ZWO ASI294MC Pro
Mounts: Losmandy G11 Gemini 2
Filters: L-Pro 2"
Software: Sequence Generator Pro · Lightroom · PixInsight

Dates:: May 2, 2019
Frames:: L-Pro 2": 60×60″(1h) (gain: 120.00) -15°C bin 1×1
Integration:: 1h
Darks:: 100
Flats:: 100
Bias:: 100
Avg. Moon age:: 27.17 days
Avg. Moon phase:: 6.20%
Bortle Dark-Sky Scale:: 7.00

RA center: 13h29m53s.12

DEC center: +47°12′40″.10

Pixel scale: 1.544 arcsec/pixel

Orientation: -38.519 degrees

Field radius: 0.960 degrees

More info:Open

Resolution: 3745x2462

File size: 2.4 MB

Locations: Foster City, Foster City, California, United States

Data source: Backyard

First light with my new RASA 11". Really impressed with it so far, and how well it seemed to hold focus through the imaging session, and smaller/sharper stars versus the HyperStar setup I had before. Some slight diffraction spikes, due to not properly routing the cables. Certainly a big and heavy scope to lift on to the mount (I have to setup each time!)

I had quite an obvious blue gradient on the lower left corner which DBE in PixInsight couldn't fix easily (think I need to work on my flats), so I just used Lightroom to apply a graduated filter to lower the black level and saturation on that corner of the image, which helped.

I like how I managed to capture some smaller (more distant) galaxies in the lower right corner of this image.

Please note: The following tables are updated every 24 hours.

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

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.
Dismissals 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	3251044
PixInsight job	5W5BX3YI8YW5OYC1WVUDJFV9MRAJHB37
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	13h29m53s.12
RA (top/left)	13h31m40s.83
RA (top/right)	13h24m15s.55
RA (bottom/right)	13h28m09s.50
RA (bottom/left)	13h35m31s.81

Dec (center)	+47°12′40″.10
Dec (top/left)	+48°07′25″.4
Dec (top/right)	+47°06′57″.9
Dec (bottom/right)	+46°17′50″.8
Dec (bottom/left)	+47°17′21″.5

Image Index:

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Whirlpool Galaxy (M51) - RASA 11"

Whirlpool Galaxy (M51) - RASA 11"

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Contribution Index (beta):

Whirlpool Galaxy (M51) - RASA 11"

Whirlpool Galaxy (M51) - RASA 11"

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