M4 (Giovanni) - AstroBin

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: M 4 · NGC 6121

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M4

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M4

M4

Elevation about 20°

Der Kugelsternhaufen Messier 4 (kurz: M 4) steht im Sternbild Skorpion, im NGC-Katalog trägt er die Nummer 6121. M 4 ist mit 7000 Lj Entfernung der nächstgelegene Kugelsternhaufen, daher wird er oft zu speziellen Untersuchungen herangezogen.

Der Haufen besitzt bei einem Durchmesser von 75 Lichtjahren etwa 100.000 Sterne und ist recht schwach konzentriert (Klasse 9), zeigt also keine sehr ausgeprägte zentrale Helligkeit. Eine Studie an mehr als 600 Weißen Zwergen ergab ein Alter von ungefähr 12,7 Milliarden Jahren.[4]

Obwohl er recht klein ist, hat M 4 eine beachtliche Winkelausdehnung und ist daher ein eindrucksvolles Objekt für die astronomische Beobachtung. Wegen seiner südlichen Position ist der Haufen allerdings für Amateurastronomen in Mitteleuropa weniger attraktiv als etwa die unweit gelegenen M5 oder M19.

Auffällig ist die, schon von Wilhelm Herschel 1783 beschriebene, zentrale Balkenstruktur, die aus einer 2,5′ langen Sternreihe etwa 11. Größe besteht und sich fast durch den ganzen dichten Haufenkern zieht. (Wikipedia).

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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.

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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.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Basic success
Started	...
Astrometry.net job	3732362
PixInsight job	n/a
PixInsight queue size	n/a
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