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Type: galaxy (AGN LINER-type), E...
Mag: B=12, V=?
Size: 2.29′ x 1.905′
NGC 5077 area. The Herschels observed the triplet, N5076-77-79 whose identities are not in doubt. Lord Rosse found N5072 and N5088, as did d'Arrest. There is some confusion in their observations concerning stars near N5072: both Howe and Swift comment that the object at first looks like a double star, with the nebula about 15 arcsec nf the star. But there is also another star about 1.7 arcmin nf the nebula; this was seen by Howe and Bigourdan (who, oddly, did not mention the star sp). It is possible that Lord Rosse's observers saw both, but on different nights, and that d'Arrest missed the sp star, just as Bigourdan did. Swift notes 6 nebulae in the area. He probably also saw the one labeled RNGC 5070 (it's possible that he saw the otherwise unnoticed object np N5088; this is brighter than RN5070), but it is clear that his description is for N5072. So, the obvious conclusion for these two is that N5072 = N5070 (not = RN5070) which is the galaxy 15 arcsec north-following the star seen by Howe and Swift. There is a bit more discussion under NGC 5070.
Synonyms: H II-193
Discovered in May 1784 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "The most northern of three. Pretty bright, very small, brighter in the middle." It was observed by John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "pretty bright, small, pretty much elongated. The second of a group of 3." The objects involved in this grouping are NGC 5076, 5077 and NGC 5079. This galaxy shows as a faint, extended nebulous patch appearing mottled at 220X in a 15.5-inch, possibly a faint star involved. It is easy to see, making a right-angled triangle with 8-9th mag stars.
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.5 mag galaxy. Their coded description reads E,SLEL,BM,COM 1'FO.
The Messier objects
The Bennett objects
The Caldwell list
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