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NGC 6057 = NGC 6053. Swift found the brightest of the two objects near this place (the other is NGC 6055) on 6 June 1886. Two nights later, he found both objects, but apparently thought both were new discoveries. It is also possible that he saw CGCG 108-127 and made a 10 arcmin error in his declination. However, this would place his position somewhat northeast of the true place of the CGCG galaxy, whereas his positions for the other objects he discovered on 6 June are generally southwest of the true places.
The RNGC (Sulentic and Tifft 1973) notes that this is a 15.5 mag galaxy. Their coded description reads STEL,IN CL.
Buta & Corwin (1986, Ap.J.Supp 62, p255-281) lists NGC 6057 as a member of the Hercules Supercluster (CGCG Field 108).
Corwin (1971, Pub. Astron. Soc. Pacific, Vol 83) gives the dimensions as 30x30 arcseconds.
The Messier objects
The Bennett objects
The Caldwell list
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