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NGC 5643 (12,485 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 5643

NGC 5643, Dunlop 469, AM 1429-435, ESO 272-16, LEDA 51969, MCG-07-30-003, SGC 142928-4357.2, h 3572, GC 3909

RA: 14h 32m 40.7s
Dec: −44° 10′ 28″

Con: Lupus
Ch: MSA:930, U2:404, SA:21


(reference key)

Type: galaxy (Seyfert 2), Sc

Mag: B=10.89, V=9.89

Size: 4.786′ x 4.168′
PA: 89°

Historical observations

Dunlop, James (1827)

James Dunlop discovered this object from Paramatta, New South Wales, and included it as No. 469 in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "an axceedingly faint, extended nebula, about 10' long; rather ill-defined."

John Herschel (1847) Cape Observations

Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "pF, L, R, vglbM; has many stars intermixed." On a second occassion he called it "pB, L, vgbM, 2', resolvable, or with stars."

Published comments

de Vaucouleurs, G. (1956)

De Vaucouleurs (1956) "Survey of bright galaxies south of -35 declination", Mem. Mount Stromlo, No. 13. (photographic study, plates taken with the 30-inch Reynolds reflector, 20-inch diaphragm).

Shapley, H. & Paraskevopoulos, J.S. (1940)

Shapley, H. & Paraskevopoulos, J.S. (1940) Southern clusters and galaxies. Harvard Obs. Bull., No.914, 6-8.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads SB,VDIF,BM,PD,*S SUP.

Ryder & Dopita (1993)

Included in the CCD-atlas of Ryder S.D. & Dopita M.A. (1993) "An H-alpha Atlas of Nearby Southern Spiral Galaxies" Astrophys.J.Suppl. 88, 415. They note: "Although NGC 5643 clearly has a bar, the arms start so close in and wrap so tightly that it is not obvious from a broad-band image. The outer western arm appears to origintae just outside the western edge of the bulge, cross the bar at about the same radius on the eastern side, themn carry on back around to the west, passing its points of origin afain some 25arcsec further out. The H-alpha image brinmgs out another arm to the north whose point of origin is not clear. The clumping of H II regions near the east and west edges of the bar are apparently real . . NGC 5643 is also a Type 2 Seyfert with an interesting velocity field."

Modern observations

Steve Gottlieb

Southern galaxies from Australia

[amastro] posting, Apr 30, 2008

14 32 40.7 -44 10 28

V = 10.0; Size 4.6x4.0; Surf Br = 13.0

24" (4/11/08): at 260x I was very impressed with this large, bright barred spiral. The halo is slightly elongated, ~3.5'x3.0' and sharply concentrated with a very bright, small, core. Extending through the center is a brighter bar oriented E-W with a star superimposed on this bar to the west of the core. A second superimposed star lies 35" to the south and continuing on this line is a third star just at the edge of the halo, 1.7' S of center. At the east end of the bar a slightly enhanced arc sweeps clockwise to the north and a similar enhancement on the west side sweeps to the south. The faint arc or arms wrap around 180, making a complete outer ring and along with the central bar these features form the Greek letter "theta". Situated in a fairly rich Lupus star field.

Contemporary observations

Magda Streicher

25 April 2009


RA: 14h32m42s - DEC: -44o10'.4 - Magnitude: 10.4 - Size: 5.1'x4.3'

Tel: 16" S/C - 290x - 462x - Date: 25 April 2009 Polokwane Vis 5

Very round in figure, quite outstanding with a very gradually brightening towards its nucleus. It appears to me like a round hazy bubble blowing away in the wind. Higher power brings out a stronger small nucleus which is somewhat uneven in shape. A few pin point stars can be on the surface. A nice string of stars can be seen a few arc minutes away from the galaxy towards the north-east star field.

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