Markarian's Chain (George Chappel)

Celestial hemisphere: Northern · Constellation: Virgo (Vir) · Contains: IC 3303 · IC 3344 · IC 3349 · IC 3355 · IC 3363 · IC 3382 · IC 3388 · IC 3393 · M 84 · M 86 · NGC 4374 · NGC 4387 · NGC 4388 · NGC 4402 · NGC 4406 · NGC 4407 · NGC 4413 · NGC 4425 · NGC 4431 · NGC 4435 · NGC 4436 · NGC 4438 · NGC 4440 · NGC 4458 · NGC 4461 · NGC 4473 · The Eyes

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Markarian's Chain

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Markarian's Chain

Due to not paying attention and wanting to capture the additional galaxies in the bottom right of the frame, I inadvertently left one of the eight Markarian's Chain galaxies (NGC 4477) out of frame (it lies just left of NGC 4473). While I failed at capturing all eight Markarian's Chain galaxies, there are a total of 23 galaxies annotated in this image. Due to cloudy weather, this image required three months to gather enough data. With such poor weather, I couldn't be picky on which nights I captured data...which meant having to do some imaging with a full moon. Throw in the light pollution from a major metropolitan area, and I had to fight some serious gradients to get the final image. Still not entirely happy with the final result, but I grew tired of fighting it and moved on to other data I needed to process.

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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	6996135
PixInsight job	NT1YQGQ5PVOYCB3SNUAKYVX0DWOH2TF9
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	12h27m41s.20
RA (top/left)	12h27m46s.43
RA (top/right)	12h24m01s.79
RA (bottom/right)	12h27m35s.94
RA (bottom/left)	12h31m20s.71

Dec (center)	+13°02′53″.9
Dec (top/left)	+13°57′22″.6
Dec (top/right)	+12°52′05″.3
Dec (bottom/right)	+12°08′23″.6
Dec (bottom/left)	+13°13′25″.6

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Markarian's Chain

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Image Index:

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Markarian's Chain

Markarian's Chain

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