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Melotte 180

NGC 6441, HD 161968

Proper NameNone
Messier NumberNone
NGC/IC NumberNGC 6441
Other DesignationsMelotte 180, HD 161968
ConstellationScorpius
Right Ascension17h 50m 13s
Declination-37° 3' 5"
Distancec. 39,100 light years
c. 12,000 parsecs
MagnitudeApparent: +7.15
Absolute: -8.25
DiameterApparent: 9.6'
Actual: 106 light years
Optimum VisibilityJune / July

At first glance, the globular cluster Melotte 180 appears to have a twin in the sky, but in fact this is not the case. The bright object to its immediate west is not another cluster but a star, specifically the orange giant Fuyue or G Scorpii. The two objects lie on a close line of sight from Earth, but are in fact widely separated in space. Fuyue is about 130 light years from the Sun, while Melotte 180 is more than 39,000 light years distant - or nearly three hundred times farther away than the foreground star. Imagery provided by Aladin sky atlas

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