M41 in BinoSky, a guide to astronomy with binoculars.


BinoSky - best bets for stargazing with binoculars

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M41, an open cluster in Canis Major

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

How to Find It
Starting from Sirius, follow the backbone of Canis Major down to the distinctive triplet of stars, then 2 degrees off to the right to a 6th magnitude star, shown in the star field map below and to the left of the cluster.

Comments
Northern-hemisphere observers in light-polluted areas should only attempt this one when it is as high as possible above the horizon.

60-degree field of view

Data (Janes, Duke, and Lynga, 1987)

RA 06 47

dec -20 44

total V magnitude 4.5

NGC number 2287

Trumpler class I 3 r

angular diameter 39'

distance 642 pc

age (Myr) 20

integrated B-V .39

observed stars 69

earliest sp. class B3

brightest star 8.0

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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.

	How to Find It Starting from Sirius, follow the backbone of Canis Major down to the distinctive triplet of stars, then 2 degrees off to the right to a 6th magnitude star, shown in the star field map below and to the left of the cluster. Comments Northern-hemisphere observers in light-polluted areas should only attempt this one when it is as high as possible above the horizon.
60-degree field of view

Data (Janes, Duke, and Lynga, 1987)
RA	06 47
dec	-20 44
total V magnitude	4.5
NGC number	2287
Trumpler class	I 3 r
angular diameter	39'
distance	642 pc
age (Myr)	20
integrated B-V	.39
observed stars	69
earliest sp. class	B3
brightest star	8.0