It was discovered on 11 April 2004, by American astronomer Jim Young at the Table Mountain Observatory near Wrightwood, California, in the United States.
[1] This minor planet was named in honor of American Jerome Apt (born 1949), who was the discovering observatory's director and also an astronaut on four Space Shuttle missions in the 1990s.
[1] The official naming citation was published by the Minor Planet Center 29 October 2012 (M.P.C.
[5] Since Massalia asteroids are of silicaceous rather than carbonaceous composition, with an albedo typically around 0.22 (also see list of families),[6] Jeromeapt possibly measures 1.1 kilometer in diameter,[4] based on an absolute magnitude of 17.1.
[2] As of 2018, the asteroid's effective size, its composition and albedo, as well as its rotation period and shape remain unknown.