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Dimensions2140 x 1489
Original file size2.16 MB
Image typeJPEG
M9 in Ophiuchus With Comet C/2007 G1 (LINEAR)

M9 in Ophiuchus With Comet C/2007 G1 (LINEAR)

Canon 350D Hap Griffin Baader Mod
20x180sec at iso 1600
30 Darks/Flats/Bias
APM/TMB 130/780

Small Wonders: Ophiuchus June, 2009 (Tom Trusock)

M9 is one of the nearer globular clusters to the nucleus of our Galaxy, with a computed distance of 5500 light-years from the Galactic Center with a diameter of 90 light years. M9 is receding from us at the very high velocity of 224 km/sec.

To the north and west, its light is significantly dimmed by interstellar dust, as it lies at the edge of a patch of dark nebula (Barnard 64 - seen in this image as a dark blot to the right of the cluster); its light is probably weakened by at least one magnitude, but it's absolute luminosity is roughly 120,000 times that of our sun.

Comet C/2007 G1 (LINEAR) can be seen at magnitude 12 in the lower left third of the frame.

June 5, 2008