BinoSky - best bets for stargazing with binoculars
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The Butterfly Cluster, M6, in Scorpius
A map of the star field. Magnitudes are given without a decimal point, e.g. 67 is to be interpreted as magnitude 6.7.

Worth looking at from a suburban or rural site, but not in the same class as its neighbor M7.

60-degree field of view

Data (Janes, Duke, and Lynga, 1987)
RA 17 40
dec -32 13
total V magnitude 4.2
NGC number 6405
Trumpler class II 3 r
angular diameter 20'
distance 490 pc
age (Myr) 78
integrated B-V .28
observed stars 331
earliest sp. class B5
brightest star 7.0

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(c) Copyright 1998 Benjamin Crowell. All right reserved.
Photos from the Digitized Sky Survey,
Sky maps created by Your Sky,