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NGC 5640 (12,302 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 5640

NGC 5640, LEDA 51263, III 949, GC 3907

RA: 14h 20m 40.81s
Dec: +80° 07′ 23.2″

Con: Camelopardalis
Ch: MSA:524, U2:10, SA:2


(reference key)

Type: galaxy

Mag: B=15.4, V=?

Size: 0.776′ x 0.467′
PA: 24°

History and Accurate Positions for the NGC/IC Objects (Corwin 2004)

NGC 5640. Dreyer has a note in the Scientific Papers that WH's offsets from another comparison star in the sweep, Kasan 2528, are probably to be prefered to those from 4 UMi which were used to reduce the NGC position of the galaxy. Neither position, in fact, is very good. The NGC places the object over a minute of time too far west, while Dreyer's new position places it too far east by about a minute. Both positions are about 3 arcmin too far south.

All this assumes that CGCG 353-035 is indeed the object that WH found. In particular, his description "little extended near parallel" (i.e. extended in RA) is much more apt for the brighter component of CGCG 353-034. However, this object is yet another minute of time further to the west from the NGC position. So, I've prefered to stay with the "traditional" identification, though CGCG did not put the number on either galaxy. RNGC, however, got the correct object.

Historical observations

William Herschel (c.1784)

Synonyms: H III-949

Discovered in 1797 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "eF, S, lE, nearly in parallel."

Published comments

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 15.5 mag galaxy. Their coded description reads R,DIF,SBM,STELNUC NUCLEAR DKLNS SUSP.

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