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RA: 14h 39m 36.52s
Dec: −26° 32′ 18″
Ch: MSA:863, U2:332, SA:21
Ref: SIMBAD, SEDS
Type: globular cluster
Mag: B=11.58, V=10.89
Synonyms: H II-196
Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, S, nearly R, bM, r."
Van den Bergh and Hagen ("UBV photometry of star clusters in the Magellanic Clouds", Astronomical Journal, Vol. 73, 1968) find that the integrated V magnitude through a 60'' diaphragm is 10.63. Through a 30'' diaphragm V = 11.04. They classify it as a globular cluster.
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.0 mag globular cluster.
Photo Index by Jim Lucyk: Burnhams V2 p1030.
RA 14 39 36.5 (2000) Dec -26 32 18 Integrated V magnitude 10.17 Central surface brightness, V magnitudes per square arcsecond 16.34 Integrated spectral type F4- Central concentration, c = log(r_total/r_core); a 'c' denotes a core-collapsed cluster 1.84 Core radius in arcmin .06. ["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) ]
Houston notes that this cluster is only 2' in diameter and may be mistaken for an 11th mag star in a 4-inch at low power. He adds that a 10-inch will reveal it clearly.
Houston includes this globular in his Hydra Hysteria. He writes: "With a diameter of more than 3' and shining at 10th mag, it should be relatively easy to find." He notes that it is "smaller, fainter and more concentrated than NGC 5897. About 4' in diameter, it shines with the total light of a 10th mag star. None of its stars could be resolved in a 10-inch." In 1972 he called it one of two globulars worth-while looking up in Hydra (the other being NGC 4590). He estimated the magnitude as 10th or 11th: "though only 2' in diameter, it can be seen in my 5-inch binoculars after its exact place has been noted relative to nearby stars."
Hartung notes: "this is one of the remote globulars which can be resolved only by large instruments; it is a conspicuous round symmetrical haze, well condensed towards the centre and about 1' across. . . it is a clear hazy spot with 10.5cm."
Steve Coe (1992, The Deep-Sky Observer, Webb Society, Issue 1) observing with a 17.5-inch f/4.5 at 100x notes: "pB, pL, R, bM; 165x and 320x very gainy, no resolution on a night I rated 5/10. At a much better site on an evening I rated 8/10 the 17.5-inch would show 6 stars superimposed on a hazy outer corona."
Steve Coe, observing with a 17.5" f/4.5 at 100X, notes: "Pretty bright, pretty large, Round, brighter in the middle; 165X and 320X, very grainy, no resolution on a night I rated 5/10. At a much better site on an evening I rated 8/10 the 17.5" would show 6 stars superimposed on a hazy outer corona.
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11M; 2' diameter; small, round glow of unresolved stars with brighter center; very distant globular at approximately 103,000 light years."
25cm - sim to N5634. core more strongly concen. 2' diam @ 180x, circ, no res.
30cm - well & broadly [strong broad] concen, 1'.8 diam w/50" fairly distinct
core. core and inner halo gran. two *s S.
Observing site: Little Bennett Regional Park
[14h 39m 36s, -26° 32' 0"] A very faint, small smudge, drowning in the southern "soup" of light pollution.
The Messier objects
The Bennett objects
The Caldwell list
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