Conjunctions in angular separation of Neptune and Mars
February 21, 2011 - 04:22 Neptune 0.6° from Mars.
February 4, 2013 - 21:03 Neptune 0.4° from Mars.
January 20, 2015 - 00:15 Neptune 0.2° from Mars.
January 1, 2017 - 06:53 Neptune 0.0° from Mars.
December 7, 2018 - 14:08 Neptune 0.0° from Mars.