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NGC 5694 (12,576 of 18,816)

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NGC 5694

NGC 5694, C 1436-263, GCl 29, Caldwell 66, II 196, h 3576, GC 3954

RA: 14h 39m 36.52s
Dec: −26° 32′ 18″

Con: Hydra
Ch: MSA:863, U2:332, SA:21

Ref: SIMBAD, SEDS

(reference key)

Type: globular cluster

Mag: B=11.58, V=10.89

Size: 4.3′
PA: ?

Historical observations

William Herschel (c.1784)

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."

Published comments

Van den Bergh & Hagen (1968)

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.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 11.0 mag globular cluster.

Photo index

Photo Index by Jim Lucyk: Burnhams V2 p1030.

Harris, W.E. (1997)

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) ]

Modern observations

Walter Scott Houston

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, E.J. (1968)

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

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

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."

Brian Skiff

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.

Contemporary observations

Tom Bryant

2010 4 11 0:21:52

Observing site: Little Bennett Regional Park

Telescope: C-11

[14h 39m 36s, -26 32' 0"] A very faint, small smudge, drowning in the southern "soup" of light pollution.

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