M5 (Matteo Ambrosi)

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

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M5

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M5

Astrophotography from my back garden going on. This time the subject is M5, a globular cluster in the snake constellation.

Globular clusters are an important object of study since they contain very ancient stars, with a low amount of heavy elements,

for they were formed in the early stages of the universe formation. These clusters are not on the same galactic plane as the other stars, but in the galactic halo.

Not being subject to the arms tidal forces, they retained their cluster shape.

M5 supposedly contains from 100,000 to 500,000 stars in about 130 light years diameter and is 24,500 light years away from the earth.

Acquisition date: 25-26/05/2020

Telescope: Skywatcher 150/750

Guide scope: UltraGuide Artesky 60/240

Mount: Celestron AVX

Camera: Canon EOS 450d modified with Baader filter

Guide camera: Zwo Asi 224 MC

Filter: Optolong L-Pro

Coma corrector: Skywatcher coma corrector 2''

Lights: 54x150'' 800 ISO

Darks: 31x150''

Flats: 41

Biases: 41

Software: APT Astro Photography Tool, PixInsight

Suburban Astrophotography
Imagers of Italy
PixInsight Addicts
Low-Cost Astrophotography
Optolong L-Pro filter

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	Basic success
Started	...
Astrometry.net job	3558349
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M5

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Image Index:

Contribution Index (beta):

M5

M5

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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