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RA: 23h 12m 53.1s
Dec: −23° 28′ 10″
Ch: MSA:1377, U2:349, SA:23
Type: galaxy, Sa
Mag: B=?, V=?
Size: 1.3′ x 0.8′
NGC 7520 may be IC 5290. Tempel had trouble with the position, and gives it as "23 06 :: -24 35 :" (equinox 1855) in his paper. He does note that the nebula was "repeatedly seen" and I5290 is the only object near his position -- aside from stars -- that he could have dug out. Of course, since there are many stars (e.g. NGC 4322) in his lists of "nebulae", this object too could well be another. Dreyer adds a note in the second IC that Howe could not find the object on two nights.
A further curiosity is the added note in the NGC description reading "between 2 stars." This is not in Tempel's paper, so was apparently added by him later in a note to Dreyer. (Or, horror, Dreyer got the object confused with another...)
The RNGC (Sulentic and Tifft 1973) notes that this is a nonexistent object. Their coded description reads NF S.
The Messier objects
The Bennett objects
The Caldwell list
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