M51 Whirlpool Galaxy (Jarrett Trezzo)

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

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M51 Whirlpool Galaxy

Link: http://cosmic-colors.com/galaxies/m51-whirlpool-galaxy/

Powered byPixInsight

M51 Whirlpool Galaxy

Link: http://cosmic-colors.com/galaxies/m51-whirlpool-galaxy/

Here's another RASA test to try and see what it can do in terms of resolution. It's probably not the best test as the seeing was not great by any means (3-3.5" FWHM for all subs), but I wanted to see what an hour of RASA/183 luminance data can do for my OSC data of longer focal length.

This time I combined from the EdgeHD 9.25 version I did last year. The stars are obviously much fatter in this version, and the details a bit less crisp, but all in all, considering the luminance data is over 1000mm less focal length than the color (620mm vs. 1650mm), I don't think it's that far off.

What do you think?

L: 60x60" QHY183M + RASA 11

RGB (OSC): 97x180" QHY247C + EdgeHD 9.25 @ f/7

Next RASA test will be short 5s exposures!

Final
Original
B
C
D
E

B

Description: a reprocess

Uploaded: ...

D

Description: a little more work on the stars

Uploaded: ...

E

Description: ultimately went with first process

Uploaded: ...

Celestron RASA
ZWO ASI183/QHY183
Cloudy Nights
QHY Users Group
Suburban Astrophotography

Galaxies
Images with QHY183M
Images with QHY247C
Images with RASA 11

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

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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
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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
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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
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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	2706178
PixInsight job	7EJ5H6CL55TTHWZCIMBX2UHS1WP1XNPV
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	13h29m50s.903
RA (top/left)	13h31m33s.345
RA (top/right)	13h27m42s.825
RA (bottom/right)	13h28m09s.501
RA (bottom/left)	13h31m58s.105

Dec (center)	+47°11′29″.55
Dec (top/left)	+47°28′32″.87
Dec (top/right)	+47°22′28″.83
Dec (bottom/right)	+46°54′20″.11
Dec (bottom/left)	+47°00′21″.69

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M51 Whirlpool Galaxy

M51 Whirlpool Galaxy

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Image Index:

Contribution Index (beta):

M51 Whirlpool Galaxy

M51 Whirlpool Galaxy

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E

Sky plot

Histogram

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