Messier 5 (Alex Woronow)

Celestial hemisphere: Northern · Constellation: Serpens (Ser) · Contains: 5 Ser · IC 4537 · M 5 · NGC 5904 · The star 5Ser

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Messier 5

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Messier 5

Messier 5

OTA: TAO 150 (f/7.3)

Camera: FLI - ML16200 (1.13 arcseconds/pixel)

Observatory: Deep Sky West, Chile

EXPOSURES:

Red: 27 x 600 sec.

Blue: 12 x 600

Green: 14 x 600

L: 23 x 600

Total exposure 12 hours

Image Width: ~52 arcminutes

Processed by Alex Woronow (2020) using PixInsight, Skylum, SWT

Globular clusters predominantly host old stars. Messier 5 is among the oldest known globular clusters in the Milky Way. GC’s tend to have very little associated gas and dust and, therefore, very no significant active star-formation. It is thought that all the stars in a given GC were born at approximately the same time, and, therefore have about the same ages. Because massive stars burn their fuels fastest, they have long since depleted their fuels and vanished in supernovae explosions. The remaining stars are mostly low-mass and old. M 5 has a few stars younger than the 12 billion-year age of the cluster, probably born from the debris of the supernovae or through star-star collisions. These stars are labeled as “blue stragglers.” All totaled, M 5 has over 100,000 stars--perhaps even 6 times this minimum number.

Globular clusters generally occur outside of the main disk of a galaxy, in a halo around it. These dense, spherical star associations probably formed in areas of abnormally elevated gas densities. However, considerably uncertainty surrounds how GC’s arise--strangely, the more massive a galaxy’s central black hole, the more globular clusters the galaxy tends to have. Is it a correlation or a cause-and-effect?

Members of Deep Sky West
Takahashi Refractors

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
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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
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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	Advanced success
Started	...
Astrometry.net job	3631015
PixInsight job	SPSBTOIBD6CXW2H2QVOVAGFD9AFAMGK6
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	15h18m33s.10
RA (top/left)	15h16m40s.30
RA (top/right)	15h20m06s.25
RA (bottom/right)	15h20m25s.100
RA (bottom/left)	15h17m00s.10

Dec (center)	+02°04′48″.5
Dec (top/left)	+01°41′30″.7
Dec (top/right)	+01°36′34″.6
Dec (bottom/right)	+02°28′06″.5
Dec (bottom/left)	+02°33′11″.9

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