M101 (Steve Argereow)

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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M101

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M101

Combined last years and this years imaging data.

M101 is a large face-on spiral galaxy located 22 million light-years away in the constellation of Ursa Major.
At magnitude +7.9. M101 is also known as the Pinwheelgalaxy and was discovered by Pierre Méchain
on March 27, 1781. He described it as "nebula without star, very obscure and pretty large. He communicated this
to Charles Messier, who verified its position and then included it in his catalogue as one of the final entries.
M101 is 180,000 Light-Years in diameter, with over 1 Trillion, Stars!

Information Credits: Home Free Star Charts

Telescope: Explorer Scientific 127mm CF APO Refractor f/7.5 (952mm Focal Length)
Explore Scientific X0.7 Reducer f/5.25 (667mm Focal Length)
Mount IOptron CEM40
Camera ZWOASI6200MC-Pro Temp -10C, Binning 1 x 1, Gain 100 Offset 50
ZWO EFW

45 X 240 Second Exposures W/Optolong L-Pro Filter 3 Hours - 4/19/2022
24 X 300 Second Exposures W/Optolong L-Pro Filter 2 Hours - 4/21/2022
30 X 360 Second Exposures W/Optolong L-Pro Filter 3 Hours - 4/22/2022
26 x 300 Second Exposures W/Optolong L-Ultimate 156 min 4/02/2023
17 X 360 Second Exposures W/Optolong L-Ultimate 102 min 4/19/2023
15 X 360 Second Exposures W/Optolong L-Ultimate 90 min 4/19/2023
40 Dark Frames 30 Flats
Total Integration Time: 13 Hours 22 Minutes
Acquisition with SharpCap
Stacked with Astro Pixel Processor
Guiding PHD2
Processed with Astra Image/GIMP
Photo taken from Seven Lakes, NC Bortle 4.5

SharpCap Users
Optolong L-eXtreme filter
AstroBin Platform open discussions community forum
ZWO ASI 2600MC PRO
North Carolina Astronomers

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	7624574
PixInsight job	1AGGU0N733ATW7CEV0DGY146QAT8GJIX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h03m18s.19
RA (top/left)	14h05m37s.93
RA (top/right)	14h05m57s.36
RA (bottom/right)	14h00m54s.79
RA (bottom/left)	14h00m42s.69

Dec (center)	+54°25′44″.6
Dec (top/left)	+53°54′28″.6
Dec (top/right)	+54°55′13″.6
Dec (bottom/right)	+54°56′53″.5
Dec (bottom/left)	+53°56′04″.0

Image Index:

Contribution Index (beta):

M101

M101

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Image Index:

Contribution Index (beta):

M101

M101

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

Notifications

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