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NGC 5665 (12,477 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 5665

NGC 5665, VV 412, Arp 49, LEDA 51953, MCG+01-37-024, UGC 9352, II 27, h 1833, GC 3923

RA: 14h 32m 25.99s
Dec: +08° 04′ 48.1″

Con: Bo÷tes
Ch: MSA:743, U2:197, SA:14


(reference key)

Type: galaxies (interacting), Sc:

Mag: B=12.6, V=?

Size: 2.041′ x 1.288′
PA: 145°

Historical observations

William Herschel (c.1784)

Synonyms: H II-027

Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "F pL lb not M."

Published comments

Burnham's Celestial Handbook

Burnham calls it pretty bright, pretty large, slightly elongated and gradually brighter in the middle. He says it measures 1.0' x 0.8' and is of 12.7 mag.

Arp (1966)

Listed as No. 49 in Arp's "Atlas of Peculiar Galaxies" (Astrophysical Journal Supplement, vol. 14, 1966.) He remarks "Appearance of wake from stellar object in eastern arm."

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 13.0 mag galaxy. Their coded description reads R,HISB,DKLNSCT DIF APP TO SF.

Modern observations


This spiral lies in Bootes near the Virgo border. It is of 12th mag and about 1' across and is easy to find since it lies about halfway between a naked-eye chain of three stars to its west and 31 Bootis to its east.

Steve Coe

Steve Coe, using a 13" f/5.6, notes: "Pretty faint, pretty small, little elongated (1.5 X 1) in PA 135 and somewhat brighter in the middle at 135X."

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "12.8M; 1' diameter; 25' SW of 8.5M SAO 120529."

Brian Skiff

= Arp 49

RC3: B=12.8/13.7

POSS: elong ~SE-NW. distorted pec. no -A visible [look again].

UGC: pa145.

RC2: f cE attached on SE = N5665A.

15cm - not vis.

- sim to N5600 just obs'd, mod f @ 80x. 140x: 1'.5 diam, sl elong N-S.

mod-strong broad concen w/o well-def core or nuc. BS, 7Jun1991, Anderson


25cm - less well concen than -00, lower sfcbr. 1' diam, round.

- perhaps pa0.

30cm - 140x: round core, broadly concen. elong N-Sish. 220x: vf nuc in mottled

inner region of core. core 1' diam, halo to 2'x1'.5 in pa15. no -A seen.

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