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NGC 147 (328 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 147

NGC 147, DDO 3, LEDA 2004, MCG+08-02-005, UGC 326, Caldwell 17, h 29, GC 72

RA: 00h 33m 11.79s
Dec: +48° 30′ 24.8″

Con: Cassiopeia
Ch: MSA:85, U2:60, SA:4


(reference key)

Type: galaxy, dG

Mag: B=12, V=?

Size: 13.18′ x 7.943′
PA: 25°

Image gallery

Photos  (1)

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Historical observations

Birr Castle/Lord Rosse

Observations with the 72-inch f/8.8 speculum telescope at Birr Castle noted "Aug 21, 1852. Involves some stars, one of about 12th or 13th mag, elongated, vF."

Published comments

Schmidt, K.-H. et al. (1993)

Schmidt K.-H., Priebe A. & Boller T. (1993) Nearby galaxies. Revised machine-readable version of the catalogue. Astron. Nachr., 314, 371. [1993AN....314..371S]

Other names: "U326, D3". Inclination: (face-on, in degrees) 57 Total photoelectric blue mag 10.47 Total colour index .95 Logarithm of the angular diameter D25 (arcminutes) 2.12 Blue photographic magnitude 10.43 This galaxy is included in a sample of galaxies with velocity less than 500km/s with respect to the centroid of the Local Group. [Nearby Galaxies. Schmidt K.-H., Priebe A., Boller T. (Astron. Nachr. 314, 371 (1993))]

Dekel, A. & Silk, J. (1986)

Mentioned in: Dekel, A. & Silk, J. (1986) The origin of dwarf galaxies, cold dark matter and biased galaxy formation. Astrophys.J., 303, 39-55.

One of the four satellite galaxies of the Andromeda Spiral, NGC 224 (M31) Of about 12th magnitude, this companion actually lies in Cassiopeia, some seven degrees North of M31.

Burnham's Celestial Handbook

A good 6-inch should show this small elliptical, which lies about 1 degree from the slightly brighter third companion NGC 185. Burnham calls it a 12.1 magnitude elliptical galaxy measuring 6.5' x 3.8' which is very faint, pretty large and elongated, making a pair with NGC 185. He notes that it is "a more difficult object [than NGC 185] for the amateur telescope, detectable with a 6-inch on the best of nights, but requiring something considerably larger (or more use of the imagination) to view it with any degree of certainty." Sanford notes that it is about 12th magnitude and appears as a fuzzy spot with ill-defined edges.

Photo index

Photo index by Jim Lucyk: Deep Sky #4 Fa83 p14, Deep Sky #8 Fa84 p12, Deep Sky #7 Su84 p23, Deep Sky #24 Fa88 p40, Burnhams V1 p529.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads LGE,VDIF,LBM,SEV*SUP.

Modern observations

Tom Lorenzin

Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes the magnitude as 11.5 and comments: "7'x 4' extent; faint blob 1 degree W and a little N of N185; this nearby member of the "Local Group" is a good supernova prospect."

Walter Scott Houston

Houston writes: "NGC 185 and NGC 147 are located about 7 degrees north of M31. Both appear slightly oval and are listed as being about 12' long. Although they have similar total magnitudes, [several observers] find NGC 185 considerably easier to see." In 1971 he wrote: "NGC 147 and NGC 185 are both dim but within reach of a 6-inch on a truly good night. The former is about 4'x2'. Recently my 5-inch moonwatch scope picked it up as a tiny but definite blur at 20x."

Brian Skiff

POSS: looks like m14 * sup vclose to center. m~14 pair 3'.9 SW lies off to

W side of maj axis outside halo. pa30.

UGC: pa25:.

7cm - found @ 30x w/o knowing location in fld. vlosfcbr, quite diaphanous. 50x: lg oval in 1.5:1 ratio, reaches m9 * as shown on U2000, elong NNE-SSW. vwk even concen. BS, 26Nov1992, Anderson Mesa.

15cm - oh, this is the losfcbr one! much lower sfcbr than gx N185, but even lgr, though still vis w/o difficulty @ 30x where it appears quite diaphanous. halo 10'x8' elong NE-SW. vbroad wk concen across center, but a * or *ar nuc (m13.5-14) is consp in center. not far w/in SW end is fuzzy spot, poss dbl *, m13.5-14. about five other *s sup on fringes of halo seen fleetingly. BS, 13Nov1988, Anderson Mesa.

25cm - nicht da.

30cm - vf, exlosfcbr. 140x shows it best, motion of the fld helps. f * assoc w/ center. maybe 3'x2', elong N-S. 220x shows only the vcenter, which is elong N-S, the * on its N end. a few other f *s about.

Contemporary observations

Tom Bryant

2010 10 9 22:59:41

Observing site: Little Bennett Regional Park

Telescope: C-11

[0h 33m 12s, 48 30m 0s] Large, and eef. Found only with the finder chart, a slight brightening of the night sky.

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