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Type: galaxy (in group), S0a
Mag: B=13.6, V=?
Size: 1.445′ x 0.891′
NGC 5797 is UGC 09619. RNGC has got the wrong position for this as well as for NGC 5794, 5804, and 5805 -- in spite of good positions in NGC. See NGC 5805 for more.
Synonyms: H III-678
Discovered in 1787 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "Two [NGC 5797 & NGC 5804] The preceding vS, vS. The following eF, eS."
The RNGC (Sulentic and Tifft 1973) notes that this is a 13.5 mag galaxy. Their coded description reads R,BM,SLDIF,B*2'SOUTH.
Steve Coe, using a 13" f/5.6, notes: "Pretty bright, pretty large, elongated 1.5X1 in PA 90 and somewhat brighter in the middle at 135X. This is the brightest galaxy in the group."
The Messier objects
The Bennett objects
The Caldwell list
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