LCRS: Computing Ephemerides in a Lunar Reference Frame

With the advent of new and increased mission to the lunar space, navigation and ephemerides needs change and we begin to look at the sky from the perspective of the lunar surface. It is now necessary to compute the ephemerides of the solar system from the perspective of the Moon. Previous use of ephemerides in cislunar space had the goal of getting space craft into orbit or on the surface of the Moon. With increased missions and framework designed around return of human missions on the surface of the Moon, computing ephemerides from the lunar perspective is a key factor for the next steps of space exploration. This paper will present techniques to compute epheremis for the solar system from both lunarcentric inertial frames, and from lunar body-fixed frames like ME and PA.