Albert Marth's position for NGC 6430 was off by 38 tsec in RA and although his description matches, modern catalogues and the U2000 (second edition) identify this galaxy as UGC 10966. Karl Reinmuth identified NGC 6430 as a chain of 4 stars and the RNGC followed suit classifying NGC 6430 as nonexistent.

Albert Marth discovered NGC 6430 = m 344 on 2 Jun 1864 and noted "vF, S, mE." There is nothing at his position, but 38 seconds of time east is UGC 10966, and Marth's description is appropriate for this galaxy.

Karl Reinmuth failed to find NGC 6430 in his photographic survey using Heidelberg plates and wrote "no mE neb seen; a chain of 4 st 14-15, 150°, in 17h 38.9m (1860)". Based on Reinmuth, RNGC misclassifies the number as nonexistent with the note "4 stars".

400/500mm - 17.5" (8/7/02): at 220x appeared as a faint, moderately large edge-on oriented E-W, 1.2'x0.3' with a low even surface brightness. A mag 13.7 star is at the following end 50" from the center and the galaxy extends nearly due west.

Notes by Steve Gottlieb