NGC 4138 NGC 4217
Cvn
☀11.2mag
Ø 3.2' / 78''

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William Herschel discovered NGC 4346 = H I-210 = h1225 on 1 Apr 1788 (sweep 823) and recorded "cB, S, BN with irregular chevelure, lE near the parallel". CH's reduction is 8' north of UGC 7463. On 10 Apr 1788 (sweep 830) he recorded "vB, vS, lE nearly in the parallel; a BN with eF branches." JH made six observations and d'Arrest made a single observation with a precise position.

300/350mm - 13.1" (4/12/86): fairly bright, very elongated 3:1 E-W, rises sharply to a small very bright core, stellar nucleus highly suspected. Located roughly 50' SE of M106.

Notes by Steve Gottlieb