M67 star cluster (Alan Ćatović)

Celestial hemisphere: Northern · Constellation: Cancer (Cnc) · Contains: M 67 · NGC 2682

M67 star cluster

Detalji snimka: ISO 800, M mode, RAW, 11 ekspozicija od po 120 s, 240 s, 360 s, 180 s, 180 s, 180 s, 180 s, 180 s, 180 s, 180 s i 180 s. Ukupno 45 minuta ekspozicije.

Messier 67 (M67 ili NGC 2682) je otvoreni zvjezdani skup u sazviježđu Rak. Otkrio ga je Johann Gottfried Koehler 1779.godine, a Charles Messier ga je samostalno otkrio godinu dana kasnije i dodao u katalog.

M67 se nalazi oko 2700 svjetlosne godine od Zemlje. Skup se proteže oko 30′ na nebu ili 23 svj. godine u stvarnosti. Starost skupa je velika, između 3,2 i 5 milijardi godina. Novije procjene govore o starosti od 4 milijarde godina. M67 nije najstariji otvoreni skup u galaksiji ali pripada među starije. Gravitacijska privlačnost među zvijezdama otvorenih skupova nije velika i oni se u većini slučajeva dezintergriraju u roku od milijardu godina.

M67 se detaljno istražuje i proučava ali unatoč tome, njegova svojstva se znatno razlikuju od izvora do izvora. Danas se smatra da je skup star 4 milijarde godina, da sadrži oko 150 bijelih patuljaka i ima ukupnu masu od 1080 do 1400 sunčevih.

Skup sadrži više od 100 zvijezda sličnih Suncu i mnogo crvenih divova. Ukupan broj zvijezda je procijenjen na oko 500. Zbog sličnosti zvijezda u skupu, M67 se detaljno proučava u svrhu razvoja modela evolucije zvijezda.

M67 ima prividni sjaj od magnitude + 6,1. Lako ga je uočiti u 10×50 dvogledu ali zvijezde su većinom tamnije od magnitude + 10 pa nisu vidljive u dvogledu. U 200 mm teleskopu moguće je vidjeti preko 50 zvijezda na prostoru ugaone širine od 20 do 30′.

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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	3273428
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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