Royal Frost discovered IC 3499 = F. 959 on a plate taken on 10 May 1904 at Harvard's Arequipa Observatory in Peru. He noted, "bM, wisps extend each side 0.3' at 130°."

600/800mm - 24" (5/20/17): at 375x; fairly faint to moderately bright, very elongated 3:1 NW-SE, ~45"x15". Contains a relatively large bright elongated core that gradually increases to a small bright nucleus with direct vision. Situated 10' NW of mag 7.6 HD 109401. IC 3510 lies 8.6' NE.

Notes by Steve Gottlieb