ASTRO: NGC 6760 A Golden Globule Cluster

NGC 6760 it a rarely imaged globular cluster in Aquila about 24,100 light-years from us and 15,600 from the galactic center. It was discovered in 1845 by John Hind. The cluster's integrated spectral type is G5 so it is slightly yellow but reddening from looking through the disk of the galaxy has turned it much redder than it really is. Half the mass of the cluster lies within 1.27 minutes of its center though stars can go out nearly 13 minutes before tidal forces of the galaxy will rip them away. That would be more than half way to the edges of the long dimension of my image. For such a nice globular it is surprisingly unknown. It is about magnitude 8.9 visually further adding to the mystery of its obscurity. In fact, checking my visual logs it appears I've ignored it like everyone else. I find no entry for it.

14" LX200R @ f/10, L=4x10' RGB=1x10' (clouds nailed color data), STL-11000XM, Paramount ME

Rick

That's a very nice shot. The reddish/yellow of the cluster
contrasts nicely with the blue foreground stars. Neither
gets lost in the dense background of the galaxy stars.

Brian
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Rick,

I just searched my harddisk and found no image of this "gold standard" of
globular clusters.
At least it is on my list now.

Stefan

"WA0CKY" schrieb im Newsbeitrag ...


NGC 6760 it a rarely imaged globular cluster in Aquila about 24,100
light-years from us and 15,600 from the galactic center. It was
discovered in 1845 by John Hind. The cluster's integrated spectral type
is G5 so it is slightly yellow but reddening from looking through the
disk of the galaxy has turned it much redder than it really is. Half
the mass of the cluster lies within 1.27 minutes of its center though
stars can go out nearly 13 minutes before tidal forces of the galaxy
will rip them away. That would be more than half way to the edges of
the long dimension of my image. For such a nice globular it is
surprisingly unknown. It is about magnitude 8.9 visually further adding
to the mystery of its obscurity. In fact, checking my visual logs it
appears I've ignored it like everyone else. I find no entry for it.

14" LX200R @ f/10, L=4x10' RGB=1x10' (clouds nailed color data),
STL-11000XM, Paramount ME

Rick


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WA0CKY

It seems to be rather overlooked by the amateur community. I don't know
why. It's been on my to-do list from the beginning but it seemed
something else always came first. May be the reason it is so rarely
seen. Just too many others competing for scope time at a time (for us
northerners anyway) it is hard to come by thanks to short nights.

Rick

On 1/21/2014 4:18 PM, Stefan Lilge wrote:
Rick,

I just searched my harddisk and found no image of this "gold standard"
of globular clusters.
At least it is on my list now.

Stefan

"WA0CKY" schrieb im Newsbeitrag ...


NGC 6760 it a rarely imaged globular cluster in Aquila about 24,100
light-years from us and 15,600 from the galactic center. It was
discovered in 1845 by John Hind. The cluster's integrated spectral type
is G5 so it is slightly yellow but reddening from looking through the
disk of the galaxy has turned it much redder than it really is. Half
the mass of the cluster lies within 1.27 minutes of its center though
stars can go out nearly 13 minutes before tidal forces of the galaxy
will rip them away. That would be more than half way to the edges of
the long dimension of my image. For such a nice globular it is
surprisingly unknown. It is about magnitude 8.9 visually further adding
to the mystery of its obscurity. In fact, checking my visual logs it
appears I've ignored it like everyone else. I find no entry for it.

14" LX200R @ f/10, L=4x10' RGB=1x10' (clouds nailed color data),
STL-11000XM, Paramount ME

Rick




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