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NGC 6325 (14,327 of 18,816)

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NGC 6325

NGC 6325, C 1714-237, ESO 519-11, GCl 58, h 3676, GC 4283

RA: 17h 17m 59.27s
Dec: −23° 45′ 57.7″

Con: Ophiuchus
Ch: MSA:1395, U2:337, SA:22

Ref: SIMBAD, SEDS

(reference key)

Type: globular cluster

Mag: B=11.49, V=10.33

Size: 4.1′
PA: ?

Historical observations

John Herschel (1847) Cape Observations

Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "pF, R, gbM, r, 1'. No doubt it is a globular."

Published comments

Helwan Obs. Bulletin No 22 (1921)

Probably small cluster. A poor plate.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag globular cluster.

The cluster glows at magnitude 10.7 and measures 4.3' across. Its concentration rating is 4.

Harris, W.E. (1997)

RA 17 17 59.2 (2000) Dec -23 45 57 Integrated V magnitude 10.33 Central surface brightness, V magnitudes per square arcsecond 17.56 Integrated spectral type G0 Central concentration, c = log(r_total/r_core); a 'c' denotes a core-collapsed cluster 2.50c: Core radius in arcmin .03. ["Catalog Of Parameters For Milky Way Globular Clusters", compiled by William E. Harris, McMaster University. (Revised: May 15, 1997; from http://www.physics.mcmaster.ca/Globular.html; Harris, W.E. 1996, AJ, 112, 1487) ]

Modern observations

Hartung, E.J. (1968) Astron.Obj.South.Tel

Hartung writes that this globular is "of fairly compact type, a round haze about 1' across with no sign of resolution, faint but not difficult with an 8-inch telescope."

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12M; 1' diameter; small and faint; unresolved; looks like EL GAL; 30' N of 5M Omicron OPH."

Steve Coe

Steve Coe, using a 13" f/5.6, notes: " Faint, pretty large, somewhat brighter in the middle at 100X. There are few field stars near this globular because of nearby dark nebulae.

Contemporary observations

Auke Slotegraaf

1981

The first search for this cluster, using a two-inch refractor, failed to locate it. But the second search showed it as an elusive pretty faint object lying in a busy starfield of 10th magnitude stars. The cluster can be found easily less than a degree away from the very beautiful red, unequal double 39 Oph. Due north of 39 Oph is a slightly fainter star, and less than twice this distance further north lies the globular. The globular appears as a cottonwool tuft of light showing no detail. I was not expecting it to show as an extended nebulous patch, but rather as a star-like object. I thought one of the 9th magnitude field stars was the cluster, and only when I started examining these stars for an extended appearance did the cluster pop into view. Three of the field stars lying due north of the cluster form a right-angled triangle.

Tom Bryant

2008-07-03 00:00:00

Observing site: Pinnacles overlook

Telescope: C-8

[17h 18m 0s, -23 46' 0"] This cluster looks like a faint, diffuse E0 galaxy. There was no granulation.

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