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Trumpler 20

Collinder 262, Harvard 7

Proper NameNone
Messier NumberNone
NGC/IC NumberNone
Other DesignationsTrumpler 20, Collinder 262, Harvard 7
ConstellationCrux
Right Ascension12h 39m 32s
Declination-60° 38' 13"
Distancec. 11,100 light years
c. 3,400 parsecs
MagnitudeApparent: +10.10
Absolute: -2.55
DiameterApparent: 16'
Actual: 50 light years
Number of Starsc. 2,500
Optimum VisibilityApril (usually visible from southern latitudes)

The distant star cluster Trumpler 20 stands out as a denser region of stars, compared to the busy background of the Milky Way beyond. Note that the arc of faded blue in this image is not an actual phenomenon, but simply a refraction effect from the bright star Mimosa (Beta Crucis) to the northeast. Imagery provided by Aladin sky atlas

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