NGC 3840 (also IRAS 11413+2021, MCG 3-30-70, UGC 6702 and PGC 36477) is a magnitude +13.8 spiral galaxy located 339 million light-years away in the constellation Leo.
The galaxy was discovered by German-Danish astronomer Heinrich Louis d'Arrest using a 27.94 cm (11 inch) f/17.5 refractor at the Copenhagen Observatory on the 8th May 1864.
Right Ascension 11h 43m 59.0s, Declination +20° 04' 37"
