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Type: galaxies (interacting), SBa
Mag: B=12, V=?
Size: 5.888′ x 2.398′
Synonyms: H I-144
Discovered in 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "cB, cL, R, gmbM."
NGC 5566/60/69, Hubble Atl.of Gal. (Sandage 1961) p43, Galaxies (Hodge,1986) p126, Galaxies (Ferris,1982) p147.
NGC 5574-5576, Galaxies (Hodge,1986) p59.
Together with NGC 5560 and NGC 5569 listed as Listed as No. 286 in Arp's "Atlas of Peculiar Galaxies" (Astrophysical Journal Supplement, vol. 14, 1966.) He remarks "connection not visible."
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads R,VDIF,LBM.
G. de Vaucouleurs ("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes "Includes the NGC 5566 & NGC 5713 group." The five brightest members of the Virgo III cloud are NGC 5566, NGC 5746, NGC 5713, NGC 5701 & NGC 5584.
This galaxy appears on page 43 of "The Hubble Atlas of Galaxies" by Allan Sandage (1961, Washington, DC).
Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11.4M; 5.8' x 1.3' extent; fairly bright, broad, NNE-SSW-oriented slash with much brighter center; 11M star 2' due E; see photo at HAG-43; very soft, centerless slash SP GAL N5560 (12.4M; 4' x 1' extent) 5' to NW midway between a pair of 9M and 10M stars and N5566; EL GAL N5576 and Co. 40' S and a little E."
Steve Coe, observing with a 13" f/5.6, notes: "Pretty bright, pretty large, much brighter middle with an almost stellar nucleus, elongated 3 X 1 in PA 30 at 100X."
Observer: Dave Mitsky Your skills: Intermediate (some years) Date/time of observation: 1999/7/15 03:35 UT Location of site: ASH Naylor Observatory, Lewisberry, PA (Lat 40.15 d N, Elev 190 meters) Site classification: Exurban Sky darkness: ~5.0 Limiting magnitude Seeing: 5 1-10 Seeing Scale (10 best) Moon presence: None - moon not in sky Instrument: 17" f/15 classical Cassegrain equatorial mount Magnification: 118, 202, 249, and 259x Filter(s): None Object(s): NGC 5566 Category: External galaxy. Class: SB(r)abII-III Constellation: Virgo Data: mag 10.4 size 5.6'x1.1' Position: RA 14h:20.3m DEC +03d:56' Description:
Although conditions were far from perfect I was successful in logging two more Herschel 400 galaxies that are found in Virgo, namely NGC 5566 (03:35 UT) and NGC 5576 (03:50 UT). NGC 5566 is an edge-on spiral that despite its size and brightness was seen only as being somewhat round with a slightly bright core. Neighboring galaxies NGC 5560 and NGC 5569 were not detected. NGC 5576, a nearby E3 elliptical, was only a small oval glow as one might expect from a 11.7 magnitude galaxy only 1.0'x0.8' in apparent size. The neighboring galaxy NGC 5574 was also noted but NGC 5577 was not. --
Observing site: Little Tycho Observatory
[14h 20m 18s, 3° 56m 0s] A faint smudge with a faint, starlike nucleus. Seyfert? N 5560 not seen. N 5566 not listed as a Seyfert.
Observing site: Little Bennett Regional Park
[14h 20m 18s, 3° 56m 0s] A very bright, small elliptical. B: Sb.
The Messier objects
The Bennett objects
The Caldwell list
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