ASTRO: NGC 6830

NGC 6830 is an open cluster in Vulpecula. When time and skies permit
and nothing else is in optimum position I work on Herschel 400 objects.
This is one of them. It was discovered by William Herschel in 1784
using his 18.7" reflector. My notes from my Herschel 400 log dated May
20, 1985 reads "An open cluster at the north end of a rich star cloud
extending north from 12 Vulpecula. Hard to tell where the cluster ends
and the star cloud begins! The cluster is good the field is even
better!" I was into exclamation points at the time it seems.

WEBDA say the cluster is reddened by a half magnitude, it is 5,300
light-years distant and about 37 million years old.

I've prepared to different versions from my data. One is is made from
the color frames only using a pseudo luminance made from the 6 color
frames. It's data is:

14" LX200R @ f/10, Pseudo L=6x10', RGB=2x10', STL-11000XM, Paramount ME

A second version was make using the same color frames and my usual 4 10
minute luminance frames. While it picks up a lot more stars. I prefer
the RGB version as it doesn't wear me out with a ton of faint stars.

14" LX200R @ f/10, L=4x10', RGB=2x10', STL-11000XM, Paramount ME

Please let me know which you prefer.

Rick
--
Prefix is correct. Domain is arvig dot net

Rick,

that's a crowded field. The blue stars in the cluster stand out well from
the background, but the red stars seem uniform in the field of view.

Stefan

"Rick Johnson" schrieb im Newsbeitrag
...

NGC 6830 is an open cluster in Vulpecula. When time and skies permit
and nothing else is in optimum position I work on Herschel 400 objects.
This is one of them. It was discovered by William Herschel in 1784
using his 18.7" reflector. My notes from my Herschel 400 log dated May
20, 1985 reads "An open cluster at the north end of a rich star cloud
extending north from 12 Vulpecula. Hard to tell where the cluster ends
and the star cloud begins! The cluster is good the field is even
better!" I was into exclamation points at the time it seems.

WEBDA say the cluster is reddened by a half magnitude, it is 5,300
light-years distant and about 37 million years old.

I've prepared to different versions from my data. One is is made from
the color frames only using a pseudo luminance made from the 6 color
frames. It's data is:

14" LX200R @ f/10, Pseudo L=6x10', RGB=2x10', STL-11000XM, Paramount ME

A second version was make using the same color frames and my usual 4 10
minute luminance frames. While it picks up a lot more stars. I prefer
the RGB version as it doesn't wear me out with a ton of faint stars.

14" LX200R @ f/10, L=4x10', RGB=2x10', STL-11000XM, Paramount ME

Please let me know which you prefer.

Rick
--
Prefix is correct. Domain is arvig dot net