Ormond Stone discovered NGC 5510 = LM 1-201 in 1886 with the 26" refractor at Leander McCormick Observatory and recorded "mag 14.0, 0.4' dia, R, gbM, *13 in field. His rough position (nearest min of RA) is 30 sec of RA west (essentially correct) and 1' north of ESO 579-003. Stone later measured an accurate position (repeated in the IC 1 Notes).

400/500mm - 17.5" (6/1/02): faint, fairly small, round, 0.9' diameter. A mag 13 star is 1.3' SSE of center. Seeing too poor for details, but the DSS image shows a knotty structure. Forms the western vertex of a near equilateral triangle with mag 9.1 SAO 158442 9' ESE and a mag 9.8 star 9' NE. A mag 6.5 star lies 28' SE.

Notes by Steve Gottlieb