Globular Clusters. This list contains 135 of the brightest and largest globular clusters from the Astroleague's observing program/list.
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1 Globular Clusters A globular cluster is a spherical collection of stars that orbit a galactic core as a satellite. Globular clusters are very tightly bound by gravity, giving them their spherical shapes and relatively high stellar densities toward their centers. A globular cluster is sometimes known more simply as a globular. Globular clusters, which are found in the halo of a galaxy, contain considerably more stars and are much older than the less dense open clusters, which are found in the disk. Globular clusters are fairly common; there are about 150 to 158 currently known globular clusters in the Milky Way, with perhaps 10 to 20 more still undiscovered. These globular clusters orbit the Galaxy at radii of 40 kiloparsecs (130,000 lightyears) or more. Larger galaxies can have more: The Andromeda galaxy may have as many as 500 while giant elliptical galaxies, such as M87, may have as many as 13,000 globular clusters. Every galaxy of sufficient mass in the Local Group has an associated group of globular clusters, and almost every large galaxy surveyed has been found to possess a system of globular clusters. The Sagittarius Dwarf galaxy and the disputed Canis Major Dwarf galaxy appear to be in the process of donating their associated globular clusters (such as Palomar 12) to the Milky Way, demonstrating how many of this galaxy's globular clusters might have been acquired in the past. Although it appears that globular clusters contain some of the first stars to be produced in the galaxy, their origins and their role in galactic evolution are still unclear. It does appear clear that globular clusters are significantly different from dwarf elliptical galaxies and were formed as part of the star formation of the parent galaxy rather than as a separate galaxy. However, recent conjectures by astronomers suggest that globular clusters and dwarf spheroidals may not be clearly separate and distinct types of objects. This list contains 135 of the brightest and largest globular clusters from the Astroleague's observing program/list. Globular Clusters 1
2 Globular Cluster Types b Hub Globulars o Halo Globulars r Far Halo Globulars m Magellanic Globulars x External Globulars (none) Unknown/No Classification Catalogs Arp Djorg ESO HP IC M N Pal Rup Ter Ton Arp & Van den Bergh Djorgoski European Southern Observatory Haute-Provence Index Catalog Messier Catalog New General Catalog (NGC) Palomar Globulars Ruprecht Terzan Clusters Tonantzintla Globular Clusters 2
3 Globular Clusters Object Const RA Dec Mag Size Type N104 Tuc 00h 24m 05s -72º 04.9' ' o N121 In SMC 00h 26m 47s -71º 32.2' ' m N288 Scl 00h 52m 45s -26º 35.0' ' o N362 Tuc 01h 03m 14s -70º 50.9' ' o N1049 For 02h 39m 48s -34º 15.5' ' x N1261 Hor 03h 12m 16s -55º 13.0' ' Pal 1 Cep 03h 33m 21s +79º 34.9' ' Pal 2 Aur 04h 46m 06s +31º 22.9' ' N1851 Col 05h 14m 07s -40º 02.8' ' M79 Lep 05h 24m 11s -24º 31.5' ' N2298 Pup 06h 48m 59s -36º 00.3' ' N2419 Lyn 07h 38m 08s +38º 55.9' ' N2808 Car 09h 12m 03s -64º 51.8' ' o ESO 37-1 Cha 09h 20m 56s -77º 16.7' 11.4 o Pal 3 Sex 10h 05m 31s +00º 04.3' ' r N3201 Vel 10h 17m 37s -46º 24.7' ' o Pal 4 Uma 11h 29m 16s +28º 58.4' ' r N4147 Com 12h 10m 06s +18º 32.5' ' r N4372 Mus 12h 25m 47s -72º 39.2' ' o Rup 106 Cen 12h 38m 39s -51º 09.1' ' r M68 Hya 12h 39m 28s -26º 44.6' ' o N4833 Mus 12h 59m 34s -70º 52.5' ' o M53 Com 13h 12m 55s +18º 10.1' ' r N5053 Com 13h 16m 27s +17º 41.9' ' r N5139 Cen 13h 26m 46s -47º 28.6' ' o M3 Cvn 13h 42m 11s +28º 22.7' ' o N5286 Cen 13h 46m 27s -51º 22.6' ' o N5466 Boo 14h 05m 27s +28º 32.1' ' r N5634 Vir 14h 29m 37s -05º 58.6' ' r N5694 Hya 14h 39m 36s -26º 32.3' ' r IC 4499 Aps 15h 00m 19s -82º 12.8' ' r N5824 Lup 15h 03m 59s -33º 04.1' ' r Pal 5 Ser 15h 16m 05s -00º 06.7' ' r N5897 Lib 15h 17m 24s -21º 00.6' ' o M5 Ser 15h 18m 33s -02º 05.0' ' o N5927 Lup 15h 28m 01s -50º 40.4' ' b Globular Clusters 3
4 Object Const RA Dec Mag Size Type N5946 Nor 15h 35m 29s -50º 39.6' ' o N5986 Lup 15h 46m 03s -37º 47.1' ' b Pal 14 Her 16h 10m 59s +14º 57.5' ' r M80 Sco 16h 17m 02s -22º 58.5' ' b M4 Sco 16h 23m 35s -26º 31.5' ' o N6101 Aps 16h 25m 49s -72º 12.0' ' r N6144 Sco 16h 27m 14s -26º 01.3' ' b N6139 Sco 16h 27m 40s -38º 50.9' ' b Ter 3 Sco 16h 28m 40s -35º 20.6' ' b M107 Oph 16h 32m 32s -13º 03.2' ' b M13 Her 16h 41m 41s +36º 27.6' ' o N6229 Her 16h 46m 59s +47º 31.7' ' r M12 Oph 16h 47m 14s -01º 56.8' ' b N6235 Oph 16h 53m 25s -22º 10.6' ' b M10 Oph 16h 57m 09s -04º 06.0' ' b N6256 Sco 16h 59m 33s -37º 07.3' ' b Pal 15 Oph 16h 59m 51s -00º 32.5' ' r M62 Oph 17h 01m 13s -30º 06.8' ' b M19 Oph 17h 02m 38s -26º 16.1' ' b N6284 Oph 17h 04m 29s -24º 45.9' ' o N6287 Oph 17h 05m 09s -22º 42.5' ' b N6293 Oph 17h 10m 10s -26º 34.9' ' b N6304 Oph 17h 14m 32s -29º 27.7' ' b N6316 Oph 17h 16m 37s -28º 08.4' ' b M92 Her 17h 17m 07s +43º 08.8' ' o N6325 Oph 17h 17m 59s -23º 46.0' ' b M9 Oph 17h 19m 12s -18º 31.0' ' b N6342 Oph 17h 21m 10s -19º 35.2' ' b N6355 Oph 17h 23m 58s -26º 21.2' b N6356 Oph 17h 23m 35s -17º 48.8' ' o IC 1257 Oph 17h 21m 08s -07º 05.6' ' r N6352 Ara 17h 25m 29s -48º 25.4' ' b N6366 Oph 17h 27m 44s -05º 04.6' ' o Ter 2 Sco 17h 27m 33s -30º 48.2' ' b HP 1 Oph 17h 31m 05s -29º 59.0' ' b N6362 Ara 17h 31m 55s -67º 02.9' ' o N6380 Sco 17h 34m 28s -39º 04.2' ' b Ter 1 Sco 17h 35m 47s -30º 28.9' ' b Globular Clusters 4
5 Object Const RA Dec Mag Size Type Ton 2 Sco 17h 36m 11s -38º 33.2' ' b N6388 Sco 17h 36m 17s -44º 44.1' ' b N6401 Oph 17h 38m 37s -23º 54.6' ' b M14 Oph 17h 37m 36s -03º 14.8' ' b N6397 Ara 17h 40m 42s -53º 40.4' ' o Pal 6 Oph 17h 43m 42s -26º 13.4' ' b N6426 Oph 17h 44m 54s +03º 10.2' ' o Ter 5 Sgr 17h 48m 05s -24º 46.8' ' b N6440 Sgr 17h 48m 53s -20º 21.6' ' b N6441 Sco 17h 50m 13s -37º 03.1' ' b Ter 6 Sco 17h 50m 47s -31º 16.5' ' b N6453 Sco 17h 50m 52s -34º 35.9' ' b N6496 Sco 17h 59m 03s -44º 15.9' ' b N6517 Oph 18h 01m 51s -08º 57.5' ' b Djorg 2 Sco 18h 01m 49s -27º 49.5' ' b Ter 10 Sgr 18h 02m 58s -26º 04.0' ' b N6522 Sgr 18h 03m 35s -30º 02.1' ' b N6535 Ser 18h 03m 51s -00º 17.8' ' b N6539 Ser 18h 04m 50s -07º 35.2' ' b N6528 Sgr 18h 04m 49s -30º 03.4' ' b N6540 Sgr 18h 06m 09s -27º 45.9' ' b N6544 Sgr 18h 07m 20s -24º 59.9' ' o N6541 Cra 18h 08m 02s -43º 42.9' ' b N6553 Sgr 18h 09m 17s -25º 54.5' ' b N6558 Sgr 18h 10m 18s -31º 45.8' ' b IC 1276 Ser 18h 10m 45s -07º 12.8' ' b N6569 Sgr 18h 13m 38s -31º 49.6' ' b N6584 Tel 18h 18m 38s -52º 12.9' ' o N6624 Sgr 18h 23m 40s -30º 21.5' ' b M28 Sgr 18h 24m 33s -24º 52.2' ' b M69 Sgr 18h 31m 23s -32º 20.9' ' b N6638 Sgr 18h 30m 56s -25º 29.8' ' b N6642 Sgr 18h 31m 54s -23º 28.5' ' b N6652 Sgr 18h 35m 46s -32º 59.4' ' b M22 Sgr 18h 36m 24s -23º 54.2' ' b Pal 8 Sgr 18h 41m 30s -19º 49.6' ' o M70 Sgr 18h 43m 13s -32º 17.5' ' b N6712 Set 18h 53m 04s -08º 42.3' ' b Globular Clusters 5
6 Object Const RA Dec Mag Size Type M54 Sgr 18h 55m 03s -30º 28.7' ' x N6717 Sgr 18h 55m 06s -22º 42.1' ' b N6723 Sgr 18h 59m 33s -36º 37.9' ' b N6749 Aql 19h 05m 15s +01º 54.1' ' o N6752 Pav 19h 10m 52s -59º 58.9' ' o N6760 Aql 19h 11m 12s +01º 01.9' ' b M56 Lyr 19h 16m 36s +30º 11.1' ' o Ter 7 Sgr 19h 17m 44s -34º 39.5' ' x Pal 10 Sge 19h 18m 02s +18º 34.3' ' o Arp 2 Sgr 19h 28m 44s -30º 21.2' ' x M55 Sgr 19h 40m 00s -30º 57.7' ' b Ter 8 Sgr 19h 41m 44s -34º 00.0' ' x Pal 11 Aql 19h 45m 14s -08º 00.4' ' o M71 Sge 19h 53m 46s +18º 46.7' ' o M75 Sgr 20h 06m 05s -21º 55.3' ' o N6934 Del 20h 34m 11s +07º 24.3' ' o M72 Aqr 20h 53m 28s -12º 32.2' ' o N7006 Del 21h 01m 29s +16º 11.2' ' r M15 Peg 21h 29m 58s +12º 10.0' ' o M2 Aqr 21h 33m 27s -00º 49.4' ' o M30 Cap 21h 40m 22s -23º 10.7' ' o Pal 12 Cap 21h 46m 39s -21º 15.1' ' r N7492 Aqr 23h 08m 27s -15º 36.6' ' r Globular Clusters 6
7 Globular Cluster Observing Log (1) Object Date Object Date N104 M5 N121 N5927 N288 N5946 N362 N5986 N1049 Pal 14 N1261 M80 Pal 1 M4 Pal 2 N6101 N1851 N6144 M79 N6139 N2298 Ter 3 N2419 M107 N2808 M13 ESO 37-1 N6229 Pal 3 M12 N3201 N6235 Pal 4 M10 N4147 N6256 N4372 Pal 15 Rup 106 M62 M68 M19 N4833 N6284 M53 N6287 N5053 N6293 N5139 N6304 M3 N6316 N5286 M92 N5466 N6325 N5634 M9 N5694 N6342 IC 4499 N6355 N5824 N6356 Pal 5 IC 1257 N5897 N6352 Globular Clusters 7
8 Globular Cluster Observing Log (2) Object Date Object Date N6366 N6624 Ter 2 M28 HP 1 M69 N6362 N6638 N6380 N6642 Ter 1 N6652 Ton 2 M22 N6388 Pal 8 N6401 M70 M14 N6712 N6397 M54 Pal 6 N6717 N6426 N6723 Ter 5 N6749 N6440 N6752 N6441 N6760 Ter 6 M56 N6453 Ter 7 N6496 Pal 10 N6517 Arp 2 Djorg 2 M55 Ter 10 Ter 8 N6522 Pal 11 N6535 M71 N6539 M75 N6528 N6934 N6540 M72 N6544 N7006 N6541 M15 N6553 M2 N6558 M30 IC 1276 Pal 12 N6569 N7492 N6584 Globular Clusters 8
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