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Keeler discovered 7 IC objects on two plates taken with the 36" Crossley reflector at Lick Observatory in May 1899 (exposed 3 and 4 hours respectively). The purpose was to photograph M 51 in Canes Venatici, so all objects are located near to this galaxy; see: Small Nebulae discovered with the Crossley Reflector of the Lick Observatory, MNRAS 59, 537 (1899). Unless the first one, IC 4257, which is only a star, all others are faint galaxies: IC 4263, 4277, 4278, 4282, 4284 and 4285. The objects are also contained as #666-672 in Keeler‘s list of new nebulae discovered with the Crossley reflector, see: Publ. Lick Obs. 8, 31 (1908). Due to the late publication only a few of the nebulae presented there appear in the IC. The Crossley reflector was originally constructed by Common at Ealing.
Obituary: PASP 12, 139 (1900); ApJ 12, 239 (1900); AN 153, 399 (1900)
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