Thursday, October 8, 2015

M29 - so obscured

Messier 29 is yet another open star cluster in the Cyngus constellation. Its stars belongs to the Cygnus OB1 association. Five brighters stars of this cluster is giants of B0 spectral type - its absolute magnitude is about -8mag, so each one is 160000 times brighter than the Sun. The M29 cluster is quite modest, its brightest members have visual magnitude fainter than 8mag, but if there would be no Milky Way dusts between the cluster and us, these stars would be 1000 times birghter than they are now. The distance to this cluster is not well determined - according to different sources it is something between 4000 and 8000 light years. 
Picture below has been shot with RGB filters - 40 minutes each one, and hydrogen alpha filter - 4 hours with 15 minutes subs. With Atik383 camera and TS130/910 0.79x refractor with reducer.
M29 open star cluster with hydrogen clouds and Milky Way stars

Clear skies!

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