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Deep Sky Observer's Companion – the online database

 

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Entire DOCdb database of 18,816 objects.

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NGC 5660 (12,443 of 18,816)

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NGC 5660

NGC 5660, LEDA 51795, MCG+08-26-039, UGC 9325, II 695, h 1832, GC 3920

RA: 14h 29m 49.7s
Dec: +49° 37′ 20.8″

Con: Bo÷tes
Ch: MSA:586, U2:77, SA:7

Ref: SIMBAD

(reference key)

Type: galaxy (in group), Sc

Mag: B=12.2, V=?

Size: 2.818′ x 2.63′
PA: 90°

Historical observations

William Herschel (c.1784)

Synonyms: H II-695

Discovered in 1787 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "pB, cL, iR, vgmbM."

Published comments

Burnham's Celestial Handbook

Burnham calls it 12.3 mag measuring 2.2' across. He says it is pretty bright, large, irregular shape and very gradually brighter in the middle.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads S,R,HISB,KNPDSSTR.

Sandage, A. et al. (1975) Galaxies and the Universe

G. de Vaucouleurs ("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes that the five brightest members of the NGC 5676 Group are NGC 5676, NGC 5660, NGC 5633, NGC 5689 & IC 1029.

Modern observations

(unknown)

This spiral lies roughly halfway between, and slightly closer to, 24 Bootis and the galaxy NGC 5676. Of 12th mag and round in shape, it is slightly smaller than 3' across. Observers with large telescopes have mentioned a brighter central region.

Walter Scott Houston

Houston notes that this galaxy is a companion to NGC 5676. It measures 2' in diameter and shines at 11.5 mag. He adds that once NGC 5676 is found, this fainter companion is easier to see.

Ware, Donald J

Donald J. Ware:"A very faint patch of light 2-3' in diameter. Barely visible as a brightening of the background sky."

Steve Coe

Steve Coe, using a 13" f/5.6, notes: "Pretty bright, pretty large, little elongated (1.5 X 1) in PA 90 and very gradually brighter in the middle at 100X."

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.3M; 2' x 1.5' extent; not-quite-round glow with little brighter center; 11M stars 4' to S and ESE; 10' SE of 5.5M 24 BOO."

Brian Skiff

RC3: V=11.9/13.8

POSS: irreg round. def not 2'.5x1' in pa0. Sm appendage (=M+8-26-38,

m(VV)=16) is 2'.6 NW.

UGC: pa(90).

15cm - not really.

- mod br @ 80x, diffuse. 140x: 1'.2 diam, sometimes sl elong E-W, rounded

oval shape. mod broad concen; sm circ core occas vis over halo. mottled

texture. BS, 15May1991, Texas Star Party.

25cm - round, 1'.25 diam. poss elong N-S. broadly brtr core w/o nuc.

- 2'.5x1' in pa0. diffuse edges, no def nuc.

30cm - fairly f, round, vpoorly concen. occas 5" nuc. 1'.5 diam, even glow with

fairly definite edges.

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