Constant JD_J1900
pub const JD_J1900: f64 = 2_415_020.0; // 2415020f64Expand description
Julian date for the J1900 epoch, as per NAIF SPICE.
pub const JD_J1900: f64 = 2_415_020.0; // 2415020f64Julian date for the J1900 epoch, as per NAIF SPICE.