Constant JD_J2000
pub const JD_J2000: f64 = 2_451_545.0; // 2451545f64Expand description
Julian date for the J2000 epoch, as per NAIF SPICE.
pub const JD_J2000: f64 = 2_451_545.0; // 2451545f64Julian date for the J2000 epoch, as per NAIF SPICE.