Pinwheel Galaxy (M101) (Greg Erianne)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: HD122865 · M 101 · NGC 5447 · NGC 5449 · NGC 5450 · NGC 5451 · NGC 5453 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5462 · NGC 5471 · NGC 5473 · NGC 5477 · Pinwheel galaxy

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Pinwheel Galaxy (M101)

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Pinwheel Galaxy (M101)

The Pinwheel Galaxy (M101, NGC 5457) is a spiral galaxy in the constellation Ursa Major, is 21 million light-years from earth, and has a diameter of 170,000 light-years, about 1.5 times the diameter of our Milky Way Galaxy. Numerous galaxies surround M101, some of which are visible in this cropped image.Image capture on 3/30/23Askar 107PHQ
ASI2600MC Pro (OSC camera)
ZWO AM5 mount with guiding via ASIAir Plus using an ASI178mm mini and a 60mm F4 guide scope
Light Frames [Total Exposure 4:40]
- Antlia RGB Triband Ultra filter -- 600s x 22 frames. . . . . . . . . . . . . . . . .[Total Exposure 3:40]
- No filter (UV/IR cut filter only from ASI2600MC) -- 180s x 20 frames. [Total Exposure 1:00]All light frames calibrated with dark, flat, and bias frames
Pre- and post-processed in PixInsight
Additional post-processing in Photoshop for generation of jpeg (for reduced file size)

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
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	7450887
PixInsight job	7XPUS91RT7T8EBA8LYMGKHO2MKAKAY7T
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m35s.444
RA (top/left)	14h01m19s.685
RA (top/right)	14h00m52s.728
RA (bottom/right)	14h05m47s.314
RA (bottom/left)	14h06m21s.468

Dec (center)	+54°26′44″.33
Dec (top/left)	+54°57′48″.36
Dec (top/right)	+53°58′42″.98
Dec (bottom/right)	+53°55′29″.27
Dec (bottom/left)	+54°54′30″.24

Image Index:

Contribution Index (beta):

Pinwheel Galaxy (M101)

Pinwheel Galaxy (M101)

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Image Index:

Contribution Index (beta):

Pinwheel Galaxy (M101)

Pinwheel Galaxy (M101)

Equipment

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Description

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