Celestial hemisphere:  Southern  ·  Constellation: Scorpius (Sco)  ·  Contains:  21 alf Sco  ·  Antares  ·  M 4  ·  NGC 6121  ·  NGC 6144  ·  PGC 185272  ·  Scorpius  ·  The star Antares (αSco)
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A quick on M4, the closest globular cluster to Earth., Claudio Tenreiro
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A quick on M4, the closest globular cluster to Earth.

Getting plate-solving status, please wait...
A quick on M4, the closest globular cluster to Earth., Claudio Tenreiro
Powered byPixInsight

A quick on M4, the closest globular cluster to Earth.

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Description

Just M4, or NGC 6121, to get it out of that rich field in the middle of the scorpion constellation. Weather was not good but the worst is pollution due to smoke... Anyway, this is a wonderful zone of the sky.

Antares also provides a dramatic yellow colour to the scene.

M4 is known to be the closest globular cluster to Earth and the second closer one is Caldwell 86

(my image of C_86 is at: https://www.astrobin.com/wf8u04/)

Estimated Mass = 6.7x10^4 Sm

Estimated Age = 12.2 +/- 0.2 Gyr

radius = 35 ly

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