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  #1  
Old 03-03-2014, 04:07 AM
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glenc (Glen)
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Another List

I usually make lists of the brightest objects. This time I selected large objects instead.

This is a list of 261 NGC and IC objects south of declination +50.
They are all visible from Brisbane's latitude and north of there.

I looked at images of all the open clusters brighter than mag 7 and picked 37 of them. I also included NGC 6520 which is mag 7.8.

I picked the 50 largest globular clusters. Some class XII globulars were not included because they are hard to see.

The 45 nebulae were chosen from wikisky.org images and from 35 years of experience. I usually look at all the bright nebulae in the sky first, when I roll out my telescope.

My cut-off mag for planetary nebulae was 12. I picked the 50 largest ones, this list contains the 39 that are south of dec +50.

I have a preference for elongated galaxies. I picked the largest galaxies, then deleted some with low surface brightness. This list contains 89 galaxies to mag 11.3.

There are 73 Messier objects and 11 IC objects in the list.
The LMC and M45 are not in the NGC catalog and not in this list.

William Herschel, James Dunlop and Charles Messier found most of the objects in this list; 87, 38 and 26 DSO respectively. John Herschel and Nicolas Lacaille found 18 and 17 of these 261 objects.

The 19 columns in the colour coded list are:
Catalog & Number, Messier #, Discoverer with year, aperture and type of scope, Object type, Constellation, Visual magnitude, Surface Brightness, Length and Width in arc-minutes, RA in hms, dec in hm.


The list is based on Dr Steinicke's PhD research.
http://www.klima-luft.de/steinicke/ngcic/ngcic_e.htm
Attached Files
File Type: pdf NGCic Sth+50.pdf (380.9 KB, 66 views)
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Old 03-03-2014, 07:26 AM
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glenc (Glen)
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The original list contained 300 DSO.
45 OC, 50 GC, 50 neb, 50 PN and 105 Gxy.
(I am not an OC fan)

This sub-list contains the 261 DSO south of dec +50.
The attached file is a summary of the DSO discoverers.
Attached Files
File Type: pdf NGCic stats.pdf (194.4 KB, 30 views)
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Old 03-03-2014, 06:42 PM
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This is brilliant!
Thank you so much Glen .
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Old 03-03-2014, 07:09 PM
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Thanks Suzy.
W & J Herschel's 18.5" aperture, 20' long telescope was like this.
http://www.cielosboreales.com/wp-con...ioherschel.jpg

Last edited by glenc; 04-03-2014 at 07:44 AM.
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Old 05-03-2014, 02:55 PM
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The 5 most elongated galaxies in this list are
NGCs 891, 4244, 4517, 4565 and 5170 (see the wikisky org image).
They were all found by William Herschel.

I saw 5170 last night (Thu am) with a 16". The core was easy to see but the ends were very faint.
Attached Thumbnails
Click for full-size image (5170.jpg)
77.4 KB22 views

Last edited by glenc; 06-03-2014 at 10:07 AM.
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  #6  
Old 05-03-2014, 08:44 PM
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Quote:
Originally Posted by glenc View Post
Thanks Suzy.
W & J Herschel's 18.5" aperture, 20' long telescope was like this.
http://www.cielosboreales.com/wp-con...ioherschel.jpg
Whoa!!!
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Old 08-03-2014, 10:29 AM
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glenc (Glen)
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263 images

Most of these 263 images of NGC and IC objects south of dec +50 have the same size field 56' by 56'.
The PN have a 28' field and large objects have a 112' field.
The file numbers are NGC or IC numbers.
http://share.shutterfly.com/view/fla...0BbM2LVo3bt3Gw
You can view on full screen.

The images are from http://server1.wikisky.org/
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Old 08-03-2014, 11:31 AM
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astroron (Ron)
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Quote:
Originally Posted by glenc View Post
Thanks Suzy.
W & J Herschel's 18.5" aperture, 20' long telescope was like this.
http://www.cielosboreales.com/wp-con...ioherschel.jpg

Suzy, Don't forget I obaserved the same galaxies in my 16" scope.
Cheers
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  #9  
Old 10-03-2014, 01:31 AM
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My 16" GSO reflector is nearly as good as W & J Herschel's 18.5".
They probably had better contrast with no secondary mirror and a longer 20 ft. tube.
Their 15 arc-min field at 157 times was much worse.
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