M45 / Pleiades Cluster / Seven Sisters (Jeff Donaldson)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: 16 Tau · 17 Tau · 18 Tau · 19 q Tau · 20 Tau · 21 Tau · 22 Tau · 23 Tau · 24 Tau · 25 eta Tau · 26 Tau · 27 Tau · 28 Tau · Alcyone · Asterope · Atlas · Barnard's Merope Nebula · Celaeno · Electra · IC 349 · M 45 · Maia · Maia Nebula · Merope · Merope Nebula · NGC 1432 · NGC 1435 · Pleiades · Pleione · Sterope II · And 10 more.

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M45 / Pleiades Cluster / Seven Sisters

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M45 / Pleiades Cluster / Seven Sisters

The Pleiades, also known as the Seven Sisters and Messier 45, is an open star cluster containing middle-aged, hot B-type stars in the north-west of the constellation Taurus. It is among the star clusters nearest to Earth, it is the nearest Messier object to Earth, and is the cluster most obvious to the naked eye in the night sky.

The cluster is dominated by hot blue and luminous stars that have formed within the last 100 million years. Reflection nebulae around the brightest stars were once thought to be leftover material from the formation of the cluster, but are now considered likely to be an unrelated dust cloud in the interstellar medium through which the stars are currently passing.

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	4093501
PixInsight job	8ZPG2FM01L0XVHWVM4YVFJ5Y1ERJPN3S
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h46m43s.14
RA (top/left)	03h50m06s.71
RA (top/right)	03h49m47s.18
RA (bottom/right)	03h43m16s.13
RA (bottom/left)	03h43m42s.18

Dec (center)	+24°11′27″.2
Dec (top/left)	+23°07′34″.6
Dec (top/right)	+25°18′31″.4
Dec (bottom/right)	+25°15′02″.9
Dec (bottom/left)	+23°04′08″.3

Image Index:

Contribution Index (beta):

M45 / Pleiades Cluster / Seven Sisters

M45 / Pleiades Cluster / Seven Sisters

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Image Index:

Contribution Index (beta):

M45 / Pleiades Cluster / Seven Sisters

M45 / Pleiades Cluster / Seven Sisters

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