Andrew Cooper
Dec 28, 2019    Kaʻohe, Mauna Kea, HI (map)
46cm f/4.5 Newtonian, Deep Violet @ 175x
Seeing: 6 Transparency: 7 Moon: 0%

Small, elongated 2' x 1' east-west, no notable core

Harold Corwin

IC 2075 = NGC 1594. Bigourdan searched for NGC 1594 on only a single night (17 Jan 1895), and did not find it. Instead, he found another nebula about 20 seconds preceding the NGC position. Instead of calling this "NGC 1594", he made it a "nova", number 260 in his list of new nebulae.

Perhaps later, when he was preparing his large table for publication, he added a note to the description of his "new" object, "It is, without doubt, NGC 1594 with a 20 second error in RA."

While I was working on SEGC, I came to the same conclusion.

See NGC 1594 for a bit more. Briefly: Howe caught Swift's poor RA, too, but Dreyer did not notice that Howe's and Bigourdan's places were nearly the same. So, the IC number stuck.

― IC Notes by Harold Corwin