Celestial hemisphere:  Southern  ·  Constellation: Tucana (Tuc)  ·  Contains:  47 Tuc  ·  NGC 104
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47 Tucanae Glocular Cluster NGC 104, Paulo Cacella
47 Tucanae Glocular Cluster NGC 104
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47 Tucanae Glocular Cluster NGC 104

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47 Tucanae Glocular Cluster NGC 104, Paulo Cacella
47 Tucanae Glocular Cluster NGC 104
Powered byPixInsight

47 Tucanae Glocular Cluster NGC 104

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Description

7 Tucanae, 47 Tuc (or NGC 104) is a globular cluster located in the constellation Tucana. It is about 4.0 ± 0.35 kpc (13,000 ± 1,100 ly) away from Earth, and 120 light years across. 47 Tuc can be seen with the naked eye, with an apparent magnitude of 4.1.[3] It appears about 50 arcminutes across. Due to its far southern location, 18° from the south celestial pole, it was not catalogued by European astronomers until the 1750s, when the cluster was first identified by Nicolas-Louis de Lacaille from South Africa.

47 Tucanae is the second brightest globular cluster after Omega Centauri, and telescopically reveals about ten thousand stars, many appearing within a small dense central core. The cluster may contain an intermediate-mass black hole.

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47 Tucanae Glocular Cluster NGC 104, Paulo Cacella