M 104 (Tom Harrison)

Celestial hemisphere: Southern · Constellation: Virgo (Vir) · Contains: M 104 · NGC 4594 · Sombrero Galaxy

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M 104

Link: http://www.manoprietoobservatory.com/gallery/galaxies/144

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M 104

Link: http://www.manoprietoobservatory.com/gallery/galaxies/144

M104, also known as the Sombrero Galaxy, is an unbarred spiral galaxy seen almost edge-on in the direction of the Constellation Virgo at a distance of 28-30 Million Light-Years. M104 has an extremely bright nucleus and a very large central bulge which extends the length of the galaxy disk. A dark dust lane containing most of the gas and dust traverses the girth, and together with the bright bulge lends it the name "Sombrero Galaxy" as seen through a telescope eyepiece. There is a supermassive black hole at least a billion times the mass of our sun in the core. The nucleua area seems devoid of any significant star forming regions. Another significant feature of M104 is its numerous globular clusters of old stars spread fairly evenly throughout the large halo, and the number of these clusters is thought to be related to the size of the bulge.

Object: M104 (Sombrero Galaxy)

Distance: 28-30 Million Light-years

Magnitude: 8.98

Date: May 2009

Place: Fort Davis, TX

Exposure Details: LRGB:6.2:2:2:2 hours unbinned

Processing: MaxIm DL, CCDStack, Photoshop CS3

Optics: 12.5" RCOS Truss

Focal Length: 2808mm @ f9

Mount: Paramount ME

Camera: SBIG STL303E

Focuser: RCOS

Guiding: Off-Axis with SBIG Guide Camera

Filters: Tru-Balance Gen II LR

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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	Basic success
Started	...
Astrometry.net job	6420411
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M 104

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