105 Globular Clusters

[glenc]

The attached list contains 105 globular clusters.
The brightest 43 GC are highlighted in yellow.
The 41 largest GC are highlighted in yellow.
34 are bright and large, they are highlighted in yellow in the 2nd column.

The following are not in the list
GC fainter than mag 12.
GC smaller than 3 arc min.

The data is from http://www.klima-luft.de/steinicke/ngcic/ngcic_e.htm

[glenc]

These 105 GC were found by
Number, Name
105 Total
36 William Herschel
23 James Dunlop
15 Charles Messier
6 John Herschel
4 Nicolas Lacaille
4 Pierre Mechain
2 Bode
2 de Chéseaux
2 Halley
2 Maraldi
1 each, 9 people

[EpickCrom]

Hi Glen.

Your lists are pure gold, I shall spend this weekend dissecting them and planning my next observing session. Thanks :thumbsup:

[glenc]

Thanks Joe
This morning I observed GC from 3:00am to 4:30am with a 10" Dob (not goto) and an 11mm EP at 109x (45' field). It was cold and windy.
Attached is a list of the 50 GC I saw with their concentration, visual magnitude, size in arc mins, constellation, RA and dec.

[EpickCrom]

Nice one Glen.

I too observed M4 and M80 last night, the bar of stars in M4 was clearly seen and M80 was a dense smaller ball of stars. Globular clusters are awesome :thumbsup:

Cheers
Joe

[glenc]

I have seen another 20 globular clusters in the last 3 nights with my 10" Dob, 70 GC all up. The faintest was NGC 6366 which is 3 degrees from M14. Franz H took this image of 6366.

[glenc]

Thanks Joe

[glenc]

James Dunlop found the bright small GC NGC 5824 in 1826. His description is attached.
Harold Corwin wrote this in http://haroldcorwin.net/ngcic/ngcnotes.all

"NGC 5824 = NGC 5834. Here is an interesting case in which Dreyer reveals his bias for his senior colleague from Great Britian, and against a younger one from Tennessee. But the younger persisted, and proved himself correct. JH's position (from his Slough sweep number 353 on 9 May 1831; curiously, there is no trace of this in his Cape Observations) is out by 2.4 minutes of time, and 3.5 arcmin; the position is not marked uncertain in any way. His description is also unusual in that it says only, "A very strongly suspected nebula; but I cannot be quite sure (from the low situation) it is not a star." He translated this to "eeF(?)" for the GC, and Dreyer went right along with that in the NGC, too. Barnard first observed this object in 1882, and had four micrometric measurements for it by 1886 when he published a note about it in AN 2756 (he has another earlier note in Sidereal Messenger 3, 189, 1884 correcting the description, but quoting JH's incorrect position). The resulting position agrees with the modern positions to within a few arcseconds. Barnard also noted the brief, incorrect description in the GC, saying that "The nebula is small and very bright with a decided nucleus." Dreyer rejected Barnard's identification of the object as GC 4036, listing both it and JH's observation, giving both objects NGC numbers. Another oddity is Dreyer's parenthetical inclusion of Marth's brief note that JH's object is "B, stellar" (I've not yet traced Marth's note). Unfortunately, Dreyer has no other note in the NGC about the two entries, so Barnard's object stands there as a "new" one, while JH's continues on with the wrong coordinates. Barnard was evidently annoyed by this, and published a second note in AN 2995 (1890) with yet more micrometric measurements, this time from Lick Observatory where he had just taken a job as one of the resident astronomers. This second position is accordant with his first to within a few arcsec, but Barnard gives more details here, noting that the object is probably a globular cluster of 10th magnitude about 3/4 to 1 arcmin in diameter. He also notes that the object must have been quite bright if JH was to have swept it up in the southern sky just six degrees above his horizon at Slough. This time, Dreyer got the point. So, in the IC1 Notes, he asks that NGC 5834 "be struck out" as it is identical to NGC 5824. Since there is nothing at JH's position, and nothing else in the area that he might have seen, the identity is assured. Finally, Glen Cozens has suggested that the cluster may have been seen by James Dunlop, too. If Dunlop's RA for his number 611 is corrected by 1.8 minutes of time (21 arcmin) it would match that for the cluster."

[glenc]

This list contains 48 GC sorted by RA.
43 are bright, they are coloured yellow in the Vmag column.
39 are large, they are coloured yellow in the Size column.
34 are both bright and large, they are coloured yellow in the Num column.

[glenc]

Mergers between the Milky Way and long-ago dwarf galaxies have enriched our skies with dozens of iconic globular clusters. Many are visible in small telescopes.

https://skyandtelescope.org/astronomy-news/see-summers-best-gobbled-globulars/?utm_source=cc&utm_medium=newsletter

[Mick]

:thumbsup: