#1
|
|||
|
|||
ASTRO: NGC 6819
NGC 6819 is an open cluster in Cygnus. This cluster is much nearer to
us than NGC 6791 at only some 7.2 thousand light years. Also it is a quite normal cluster with one stellar population with the expected metal content. But like NGC 6791 is far older than most clusters. Though its stars all show an age of about 2.4 billion years. This is still very old for a star cluster indicating it too has the mass needed to resist the tidal forces of our galaxy tearing it apart. Note the distant near edge on spiral on the far left. It is 2MFGC 15077. I can't find any redshift data. Closer to the cluster on the same line is a pair of spirals at nearly right angles to each other. I can't even find a catalog entry for them however. So no way for me to tell if they are interacting or not. 14" LX200R @ F/10, L=6x10' RGB=2x10', STL-11000XM, Paramount ME Image is at 1.5" per pixel. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#2
|
|||
|
|||
ASTRO: NGC 6819
Beautiful image Rick, the cluster looks great and even if you had not
mentioned it I would have enjoyed the small edge-on galaxy. Stefan "Rick Johnson" schrieb im Newsbeitrag ster.com... NGC 6819 is an open cluster in Cygnus. This cluster is much nearer to us than NGC 6791 at only some 7.2 thousand light years. Also it is a quite normal cluster with one stellar population with the expected metal content. But like NGC 6791 is far older than most clusters. Though its stars all show an age of about 2.4 billion years. This is still very old for a star cluster indicating it too has the mass needed to resist the tidal forces of our galaxy tearing it apart. Note the distant near edge on spiral on the far left. It is 2MFGC 15077. I can't find any redshift data. Closer to the cluster on the same line is a pair of spirals at nearly right angles to each other. I can't even find a catalog entry for them however. So no way for me to tell if they are interacting or not. 14" LX200R @ F/10, L=6x10' RGB=2x10', STL-11000XM, Paramount ME Image is at 1.5" per pixel. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) | [email protected] | Astronomy Misc | 0 | August 15th 07 09:36 PM |
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) | [email protected] | SETI | 0 | May 3rd 07 01:08 AM |
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) | [email protected] | Astronomy Misc | 0 | April 12th 07 01:05 AM |
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) | [email protected] | SETI | 0 | April 12th 07 01:05 AM |
[sci.astro,sci.astro.seti] Contents (Astronomy Frequently Asked Questions) (0/9) | [email protected] | SETI | 0 | October 6th 05 02:34 AM |