NGC 2794 IC 530
Cnc
☀13.2mag
Ø 72'' / 60''

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Édouard Stephan discovered NGC 2557 = St VIIIb-29 on 2 Feb 1877 with the 31" silvered-glass reflector at the Marseille Observatory. Esmiol's re-reduced position is an exact match with UGC 4330.

400/500mm - 17.5" (2/8/91): fairly faint, small, round, gradually brighter core. Located 5' SE of mag 8.2 SAO 80087 in the Cancer I galaxy cluster.

Notes by Steve Gottlieb