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NGC 5548 (12,255 of 18,816)

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NGC 5548

NGC 5548, LEDA 51074, MCG+04-34-013, Mrk 1509, UGC 9149, II 194, h 1773, GC 3838

RA: 14h 17m 59.65s
Dec: +25° 08′ 13.4″

Con: Bo÷tes
Ch: MSA:672, U2:152, SA:7

Ref: SIMBAD

(reference key)

Type: galaxy (Seyfert 1)

Mag: B=13.1, V=13.7

Size: 1.479′ x 1.174′
PA: 110°

Historical observations

William Herschel (c.1784)

Synonyms: H II-194

Discovered in 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "F, pL, R, mbM."

Published comments

Burnham's Celestial Handbook

Burnham calls it a 12.9 mag spiral galaxy in Bootes, 0.5' across, pretty faint, pretty small, round and very suddenly very much brighter in the middle.

Sulentic & Tifft (1973)

(Sulentic and Tifft 1973) notes that this is a 13.5 mag galaxy. Their coded description reads R,HISBCT,DIFPERIPH DKLN NR PERIPH.

RCBG3

de Vaucouleurs, G. et al. (1991) Third Ref. Cat. of Bright Galaxies (RC3)

This galaxy is listed in the "Third Reference Catalogue of Bright Galaxies" as being a bright Seyfert galaxy. The integrated B magnitude of the stellar system (excluding the nucleus) = 13.30, and the B magnitude of the quasi-stellar nucleus = 14.8-15.8.

Modern observations

Steve Coe

Coe, using a 13" f/5.6, notes: "Faint, small, round, very much brighter middle at 100X."

Brian Skiff

RC3: V=12.6/13.1

POSS: damn nr circ. m12.5 * 2'.6 S.

UGC: pa(110).

15cm - difficult. *ar nuc w/vf halo.

- sl brtr, much smlr than -23. *ar nuc consp @ 80x, m13. 140x: approx circ,

1'.5 diam, or one-third distance to m12.5 * S. mod broad concen except

for sharply brtr *ar nuc. BS, 20May1988, Anderson Mesa.

- fairly f & vsm @ 80x w/vconsp *ar nuc. 140x: 30" diam, vf halo and m13.5

*ar nuc, sl fntr than m13.0 * 3' SSW. BS, 7Jun1991, Anderson Mesa.

25cm - seen @ 47x. less than 1' diam. *ar nuc, core seems in pa135. 180x best.

30cm - br, *ar nuc prominent @ 140x. 220x: 1' diam w/poor concen, nuc now

sub*ar. vsm. f *s assoc. CBL, Roof.

Contemporary observations

Magda Streicher

(no date)

Alldays (22.50S, 20.12E, 770m).

12-inch f/10 SCT (218x, 346x)

Round in shape with bright small core which is outstanding. More or less 2' in size in a E-W direction.

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