marss 0.0.3

Mars celestial simulation crate for the MilkyWay SolarSystem workspace
Documentation 
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pub const J2000_EPOCH: f64 = 2_451_545.0;

pub struct MarsEpoch {
    pub julian_date: f64,
}

impl MarsEpoch {
    pub fn j2000() -> Self {
        Self {
            julian_date: J2000_EPOCH,
        }
    }

    pub fn from_jd(jd: f64) -> Self {
        Self { julian_date: jd }
    }

    pub fn centuries_since_j2000(&self) -> f64 {
        (self.julian_date - J2000_EPOCH) / 36525.0
    }

    pub fn days_since_j2000(&self) -> f64 {
        self.julian_date - J2000_EPOCH
    }

    pub fn sols_since_j2000(&self) -> f64 {
        self.days_since_j2000() * 86400.0 / crate::SOL_S
    }

    pub fn advance_sols(&mut self, sols: f64) {
        self.julian_date += sols * crate::SOL_S / 86400.0;
    }

    pub fn advance_seconds(&mut self, seconds: f64) {
        self.julian_date += seconds / 86400.0;
    }

    pub fn mars_year(&self) -> i32 {
        let msd = super::calendar::MarsSolDate::from_julian_date(self.julian_date);
        msd.mars_year
    }

    pub fn ls_deg(&self) -> f64 {
        let msd = super::calendar::MarsSolDate::from_julian_date(self.julian_date);
        msd.ls_deg()
    }
}