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Type: galaxy, S0
Mag: B=15.5, V=14.5
Size: 0.3′ x 0.2′
NGC 7604 and NGC 7605 = NGC 7583 were found by Marth late in 1864. There is nothing in his places that he could have seen with Laselle's 48-inch telescope, but just one minute of time preceding is a pair matching his descriptions and relative positions. It happens that he had found the brighter of the pair earlier in the same year. Thus, that object has two entries in his list, and two NGC numbers.
Unfortunately, CGCG put the number 7583 on the fainter of the galaxies, though it does in fact belong to the brighter.
The RNGC (Sulentic and Tifft 1973) notes that this is a 15.0 mag galaxy. Their coded description reads SLEL,E,BM.
Steve Gottlieb notes: "17.5-inch: very faint, round, 15" diameter, appears to brighten slightly at the center. Can just hold steadily with averted vision. Forms a pair with N7583 = N7605 3.0' S."
The Messier objects
The Bennett objects
The Caldwell list
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