Albert Marth discovered NGC 6006 = m 294, along with NGC 6007 and 6009, on 2 Jun 1864 and noted "vF, S." His position is accurate (to within 1' of polar distance).
400/500mm - 17.5" (5/13/88): very faint, very small, slightly elongated. In a trio with brighter NGC 6007 6' ESE and NGC 6009 NE.
Notes by Steve Gottlieb