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NGC 6503 (14,725 of 18,816)


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NGC 6503

NGC 6503, LEDA 60921, MCG+12-17-009, UGC 11012, GC 4351

RA: 17h 49m 26.64s
Dec: +70° 08′ 40.1″

Con: Draco
Ch: MSA:1054, U2:30, SA:3


(reference key)

Type: galaxy (AGN LINER-type), Sc

Mag: B=10.9, V=?

Size: 6.918′ x 2.511′
PA: 123°

Published comments

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads EL,HISB,DIFPERIPH PERIPH SSTR.

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

G. de Vaucouleurs ("Galaxies and the Universe", Chapter 14 - Nearby Groups of Galaxies) notes that NGC 6503 is a foreground member of the NGC 6643 Group.

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: "U11012,12-17-009". Inclination: (face-on, in degrees) 72 Total photoelectric blue mag 10.91 Total colour index .68 Logarithm of the angular diameter D25 (arcminutes) 1.85 Blue photographic magnitude 11.01 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))]

Photo index

Photo Index by Jim Lucyk: Sky&Tel. 4/70 p235, Astronomy mag. 5/88 p99.

de Vaucouleurs, G. (1975) NGC 6643 Group

de Vaucouleurs, G. (1975) Nearby groups of galaxies. In: Kuiper, G. (ed) Stars and Stellar Systems. Volume 9: Galaxies and the Universe. Chapter 14, p557.

Foreground NGC 6503; background NGC 6621.

Brightest members: 6643 ( B(0) = 11.97), 6217 ( B(0) = 12.17), 6340 ( B(0) = 12.21), 6412 ( B(0) = 12.62), 6654 ( B(0) = 12.80).

de Vaucouleurs, G. (1975)

de Vaucouleurs, G. (1975) Nearby groups of galaxies. In: Kuiper, G. (ed) Stars and Stellar Systems. Volume 9: Galaxies and the Universe. Chapter 14, p557.

5. The nearer groups within 10 megaparsecs

G5. M101 (NGC 5457) Group. (may consist of 2 separate multiplets centred on M51 and M101.

Brightest members: 5457, 5194, 5055, 5195, 5585.

This is a traditional group, but its membership is somewhat uncertain. It is included by van den Bergh in his extended M94 group, but Holmberg and Sersic make it a separate group. … The major members, then, are M101 (NGC 5457) and its satellites NGC 5204, NGC 5474, NGC 5585 and the wide pair formed by M51 (NGC 5194 and companion NGC 5195) and M63 (NGC 5055); a probable member is NGC 5949, and possibly some outlying systems including NGC 4605, NGC 5907, NGC 6503, A1353 (Ho IV) and A1339 (Ho V). Many dwarfs are concentrated in the region … Except for NGC 5195 (type I0) all bright members of the group are spirals of type later than Sb and dwarf Magellanic irregulars … the overall dimensions of the group are 23° x 16°, and agan there is no central condensation.

Modern observations

Walter Scott Houston

At 10th magnitude and 4.5' wide, this spiral galaxy in Draco it is easy in amateur telescopes. Houston reports seeing it at 20x with a replica of Galileo's telescope.

Tom Lorenzin

Tom Lorenzin, in the e-version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "11M; 5' x 1' extent; faint slash oriented NW-SE; bright axial line along major diameter; no point-like core; 9M star 4' to E; two 13M stars closer in, one 3' to NE, one 3' W and a bit S; !good supernova prospect!."

Brian Skiff

Lick: pa115. m13.8 * 2'.5 N. *? on E edge.

Hartung: pa125, UGC: pa123.

POSS: no br * NW, only 3'.5 E. gx in pa121. m13 * (pair actually) 2'.2

NNE. no * vis on E edge.

6cm - just seen as splotch W of m9 *.

8cm - pretty hisfcbr, lentic, elong in pa110. *s nrby NW & E. BS, 13Aug1983, Anderson Mesa.

15cm - 3'x1' w/brtr core and fntr extensions. actually somewhat thinner in width. faint but tantalizing.

- mod br in pa110, 3'x0'.75. just W of m8.5 *. brtr center.

- lg br gx @ 50x W of V=8.6 * (T&B chart), elong in pa 120. 80x: length = 3/4 sep of V=8.6 * and V=13.6 * SW of center. V=14.7 * just vis @ 80x, which also shows * NNE, m14.0 (my est). elong in 4:1 ratio, outline is lentic w/rounded ends. occas *ar nuc, but generally modhisfcbr glow makes it hard to see. wk mottlings or dk bars across halo sim to M82 but not so obvious. a dk lane cuts in SE of center; SE end somewhat fntr generally than NW end. BS, 2Jul1992, Anderson Mesa.

25cm - wow! big and br, 4'x1' in pa80. even glow w/a little brtning to an off- center ore (to W). E edge seems to taper off. well def @ 90x. *? in E edge.

- pretty br, lentic. core off-center to W. 4'x0'.75 in pa110. halo E much fntr than W side.

30cm - br but rel unconcen. broad core is grainy w/br speckles @ 140x. pa110.

220x: core itself in pa100, whole gx in pa110. 4'.5x1' overall. occas f *ar nuc. core lg & mottled. N edge is sharper. m13.8 * to N. halo to W is longer, poss due to m9 * E.

Contemporary observations

Tom Bryant

2010 10 8 20:17:45

Observing site: Little Bennett Regional Park

Telescope: C-11

[17h 49m 24s, 70 9m 0s] A bright, uniform smudge, quite elongated, slighly

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