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Mag: B=13.8, V=?
Size: 0.794′ x 0.446′
NGC 6202 may be the same galaxy as NGC 6226. The description fits, there is a star near following, and the declinations are the same. The problem, of course, is the seven minute RA difference. This would not be the only large RA error in Swift's lists, of course, but it still prevents a positive identification.
All in all, 9 July 1886 was not a good night for Lewis Swift. Of the three nebulae he found that night, we can now pretty surely identify only NGC 6170 (which see). NGC 6135 (which also see) and N6202 are far enough from Swift's positions that we will probably never know for sure which nebulae Swift actually saw.
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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