NGC 4438 - Cadena de Markarian (Ramón Delgado Fernández)

Celestial hemisphere: Northern · Constellation: Virgo (Vir) · Contains: IC 3311 · M 84 · M 86 · NGC 4374 · NGC 4387 · NGC 4388 · NGC 4402 · NGC 4406 · NGC 4413 · NGC 4425 · NGC 4431 · NGC 4435 · NGC 4436 · NGC 4438 · NGC 4440 · NGC 4458 · NGC 4459 · NGC 4461 · NGC 4473 · NGC 4474 · NGC 4476 · NGC 4477 · NGC 4478 · The Eyes

NGC 4438 - Cadena de Markarian, Ramón Delgado Fernández

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NGC 4438 - Cadena de Markarian

Link: http://www.ramon-astronomia.es/NGC4438_Markarian_11-05-13_web.jpg

En diciembre de 1961 el astrónomo armenio Benjamín E. Markarian (1913-1985), publicó en The Astronomical Journal, un paper titulado: Physical Chain of Galaxies in the Virgo Cluster and Its Dynamic Instability. En él presentaba un estudio de la zona ocupada por 8 galaxias, ubicadas en el área central del gigantesco Cúmulo de Virgo, unidas en una curvada cadena de 1,5º de extensión, con aparente conexión física. Markarian notó que esta cadena era parte de un círculo centrado en (12h 22m; +14º 28'), muy cerca de un par de galaxias de 11ª magnitud, catalogadas NGC 4298 y NGC 4302 y, que era difícil que sea una formación al azar. Esta idea fue siempre discutida y hoy por hoy, se cree que todo este sistema es solo generado por efecto de proyección, sin tener una real conexión gravitatoria.

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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
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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
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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	Basic success
Started	...
Astrometry.net job	980441
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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NGC 4438 - Cadena de Markarian

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NGC 4438 - Cadena de Markarian

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