M39 in BinoSky, a guide to astronomy with binoculars.


BinoSky - best bets for stargazing with binoculars

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Open cluster M39 in Cygnus

A map of the star field. Magnitudes are given without a decimal point, e.g. 67 is to be interpreted as magnitude 6.7.

Comments
Visible from a reasonably dark area, but nothing worth writing home about.

Data (Janes, Duke, and Lynga, 1987)

RA 21 32

dec 48 26

total V magnitude 4.6

NGC number 7092

Trumpler class III 2 m

angular diameter 29'

distance 290 pc

age (Myr) 200

integrated B-V .06

observed stars 28

earliest sp. class A0

brightest star 7.0

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	A map of the star field. Magnitudes are given without a decimal point, e.g. 67 is to be interpreted as magnitude 6.7.

Data (Janes, Duke, and Lynga, 1987)
RA	21 32
dec	48 26
total V magnitude	4.6
NGC number	7092
Trumpler class	III 2 m
angular diameter	29'
distance	290 pc
age (Myr)	200
integrated B-V	.06
observed stars	28
earliest sp. class	A0
brightest star	7.0