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RA: 20h 00m 58.27s
Dec: −47° 04′ 11.6″
Ch: MSA:1472, U2:411, SA:23
Ref: SIMBAD, Corwin (2004)
Type: galaxies (interacting), SB
Mag: B=12.8, V=12.16
Size: 2.818′ x 1.23′
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "eF, lE, glbM, 30 arcseconds." On a second occassion he called it "vF, R, bM, 15 arcseconds."
The ESO/Uppsala Survey of the ESO(B) Atlas remarks: "[ESO 284-IG 8] open spiral, strongly interacting with irregular galaxy 1.4' N.f. and with SO galaxy 0.8' S.p.; another small companion lies 1.9' S.p ."
Bergwall et.al. (1978(Astron. Astrophys. Suppl. 33, 243-255) gives the B-magnitude in the Johnson system for the four components, a-d, as 14.28, 15.58, 15.04 and 16.64. Photoelectric UBV measurements give V=13.596 (44'' diaphragm) for component a, V=14.026 (32'' diaphragm) for component b, V=15.699 (22'' diaphragm) for component c and V=14.831 (32'' diaphragm) for component d.
The RNGC (Sulentic and Tifft 1973) notes that this is a galaxy. Their coded description reads 24-EL,BM,ALMSTELNUC.
Photo Index by Jim Lucyk: Cat.of South.Peculiar Gal.and Ass. Vol 2 (Arp&Madore, 1987) p4.2.
The Messier objects
The Bennett objects
The Caldwell list
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