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About this observation
Peter Mulligan
Time of observation
28/09/2018 - 20:10
Galactic cluster M39
Observing location
Sheffield, UK
Skywatcher Explorer 200p
on EQ5
Canon 1100D
28-20sec, 800ISO

This prominent cluster is about 1060 light years away, and occupies a volume of 7 light-years.  The stars are mainly early spectral types of A and B.  The brightest member HD 205210 B9IV is about 200 times the luminosity of the sun.

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