The open cluster M103 = NGC 581 is roughly 20 Myr old, at a distance modulus of (m - M) = 12.89 = 3.8 kpc.
RA = 01:33:23 Dec = +60:39:00
Finding chart for visual use, field of view roughly 20 degrees:
R-band finding chart, roughly 9x9 arcminutes:
K-band finding chart, slight larger (11x11 arcminutes)
Copyright © Michael Richmond. This work is licensed under a Creative Commons License.