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Type: galaxies (interacting), E/S0
Mag: B=12.5, V=11.61
Size: 1.148′ x 1.071′
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "pB, R, vgbM."
[amastro] posting, Apr 30, 2008
18 22 17.7 -85 24 07
V = 11.1; Size 1.6x1.3; Surf Br = 11.8; PA = 156d
24" (4/11/08): at 260x, the appearance of this interacting peculiar galaxy is very strange! N6438 is moderately bright, small, round, 0.4' diameter. An elongated glow attached on the E side is a disrupted system (N6438A) with two extensions or arms (it may be two different interacting galaxies). Visually the companion appeared as a faint, diffuse, elongated SW-NE glow attached to N6438, ~0.8'x0.5'. This system is the second closest NGC galaxy to the south celestial pole. Located 4' NE of a mag 9.5 star and 16' NE of mag 8 HD 160820.
Galactic and Extragalactic Studies, III. Photographs of thirty southern nebulae and clusters. Proc. N.A.S., 26, 31-36.
The RNGC (Sulentic and Tifft 1973) notes that this is a galaxy.
An interpretation of ring galaxies and the properties of intergalactic gas clouds. Astrophys.J., 194, 569-585.
Freeman and de Vaucouleurs (1974, Astrophysical Journal, 194, 569-585) lists NGC 6438 as a ring galaxy.
by Jim Lucyk: Cat.of South.Peculiar Gal.and Ass. Vol 2 (Arp&Madore, 1987) p2.7.
The Messier objects
The Bennett objects
The Caldwell list
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