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Summer Rose Star

M55, NGC 6809

Proper NameSummer Rose Star
Messier NumberM55
NGC/IC NumberNGC 6809
ConstellationSagittarius
Right Ascension19h 41m 1s
Declination-30° 55' 28"
Distancec.17,600 light years
c.5,400 parsecs
MagnitudeApparent: +6.3
Absolute: -7.4
DiameterApparent: 5' 42"
Actual: c.100 light years
Optimum VisibilityJuly / August
NotesDespite its common name of the Summer Rose 'Star', M55 is in fact a loose globular cluster about a hundred light years across, lying some 18,000 light years from the Solar System in the general direction of the Galaxy's Core.

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