A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Others » Astro Pictures
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

ASTRO: Palomar 15



 
 
Thread Tools Display Modes
  #1  
Old July 23rd 12, 07:43 AM
WA0CKY WA0CKY is offline
Senior Member
 
First recorded activity by SpaceBanter: Feb 2008
Posts: 689
Default ASTRO: Palomar 15

Palomar 15 was cataloged by many as a galaxy. The Karachentseva Isolated Galaxy Catalogue says of it; "Resolved dwarf system. ...bright nucleus and diffuse halo." It is also listed by the UGC, PGC, MCG and CGCG catalogs as a galaxy. UGC also calls it a dwarf system. But it is a globular cluster in Ophiuchus where many of our galaxy's globular clusters reside. It is about 145,000 light-years distant on the far side of our galaxy, 125,000 light-years from the center. So it suffers quite a bit of extinction making it even dimmer than it already is. While listed at 14.2 magnitude it is extremely difficult in an 18" scope and hardly better in far larger ones. Sources vary as to the discoverer. It was discovered in 1959. Some sources credit George Abell, others Fred Zwicky. It has the largest diameter core of any known globular but is of such low density it obviously has never been near the galaxy's core or it would have been completely ripped apart in one pass. You can read more about it at: http://articles.adsabs.harvard.edu/f...J.....99..229S

Only a handful of the galaxies in the image are listed at NED and none with redshift data so I've not prepared an annotated image. There's an asteroid in the image, Renaldowebb, near the west edge (right). It is at an estimated 18.3 magnitude. The naming citation reads: "(21674) Renaldowebb = 1999 RG18 Renaldo Michael Webb (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his physics project. He attends the Louisiana School for Mathematics, Science, and the Arts, Natchitoches, Louisiana, U.S.A."

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

RickPalomar 15 was cataloged by many as a galaxy. The Karachentseva Isolated Galaxy Catalogue says of it; "Resolved dwarf system. ...bright nucleus and diffuse halo." It is also listed by the UGC, PGC, MCG and CGCG catalogs as a galaxy. UGC also calls it a dwarf system. But it is a globular cluster in Ophiuchus where many of our galaxy's globular clusters reside. It is about 145,000 light-years distant on the far side of our galaxy, 125,000 light-years from the center. So it suffers quite a bit of extinction making it even dimmer than it already is. While listed at 14.2 magnitude it is extremely difficult in an 18" scope and hardly better in far larger ones. Sources vary as to the discoverer. It was discovered in 1959. Some sources credit George Abell, others Fred Zwicky. It has the largest diameter core of any known globular but is of such low density it obviously has never been near the galaxy's core or it would have been completely ripped apart in one pass. You can read more about it at: http://articles.adsabs.harvard.edu/f...J.....99..229S

Only a handful of the galaxies in the image are listed at NED and none with redshift data so I've not prepared an annotated image. There's an asteroid in the image, Renaldowebb, near the west edge (right). It is at an estimated 18.3 magnitude. The naming citation reads: "(21674) Renaldowebb = 1999 RG18 Renaldo Michael Webb (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his physics project. He attends the Louisiana School for Mathematics, Science, and the Arts, Natchitoches, Louisiana, U.S.A."

14" LX200R@ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME
Attached Thumbnails
Click image for larger version

Name:	PAL15L4X10RGB2X10.JPG
Views:	230
Size:	326.2 KB
ID:	4199  Click image for larger version

Name:	PAL15L4X10RGB2X10CROP150.JPG
Views:	81
Size:	138.0 KB
ID:	4200  
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Journey to Palomar Rick Evans[_3_] Amateur Astronomy 3 August 22nd 08 06:01 PM
ASTRO: Palomar 5 From Colorado Springs Doug W. Astro Pictures 6 June 14th 08 04:46 AM
Observing Palomar 11 Bill Cotten Amateur Astronomy 1 July 31st 06 01:30 AM
Pilgrimage to Palomar Bill Ferris Amateur Astronomy 32 July 9th 04 04:40 AM
Palomar Starlord Amateur Astronomy 4 October 30th 03 05:56 AM


All times are GMT +1. The time now is 09:57 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 SpaceBanter.com.
The comments are property of their posters.