Uses of Class
net.grelf.astro.JulianDate

Packages that use JulianDate

Package	Description
net.grelf.astro	This package contains Java classes for astronomical applications.

Uses of JulianDate in net.grelf.astro

Fields in net.grelf.astro declared as JulianDate

Modifier and Type	Field and Description
protected JulianDate	StarChartLoader.epoch

Methods in net.grelf.astro that return JulianDate

Modifier and Type	Method and Description
JulianDate	JulianDate.clone() Returns a new JulianDate object with the same data.
static JulianDate	JulianDate.createJulianDate(java.lang.String xmlDateTime) Use this instead of constructor if the xmlDateTime may not be in W3C schema style.
JulianDate	StarChartLoader.getEpoch()
JulianDate	Epoch.getJulianDate() Returns null if the epoch type is not 'B' or 'J'.

Methods in net.grelf.astro with parameters of type JulianDate

Modifier and Type	Method and Description
SkyPoint	Topocentre.adjust(SkyPoint geocentric, double deltaAU, JulianDate jd) Adjust the given geocentric SkyPoint of an object at distance deltaAU (in astronomical units) to its topocentric value, ie as seen from this Topocentre at the given time.
double	Topocentre.calcAltitudeDegs(SkyPoint pt, JulianDate jd) Calculate the altitude of the given SkyPoint above the local horizon at the given time.
double	Topocentre.calcAzimuthDegs(SkyPoint pt, JulianDate jd) Calculate the azimuth (measured from South via West) of the given SkyPoint above the local horizon at the given time.
double[]	SkyPoint.calculateRiseTransitSet(JulianDate jd, BodyKind kind, Angle longitude, Angle latitude) Returns an array of 3 fractions of a day, representing respectively the local times of rising, transit and setting for the given latitude and refraction offset (h0 = -0.5667 for stars and planets, -0.8333 for the Sun, +0.125 for the Moon).
void	Star.changeEpoch(Epoch newEquinox, JulianDate newEpoch) This adjusts the fields of the current object to the given new equinox (eg, J2000) and epoch (eg, JD now) by first applying proper motion for the new epoch and then calling SkyPoint.changeEpoch (equinox) on the resulting position.
void	Hipparcos.load(java.util.List<Star> stars, java.util.Map<java.lang.String,Star> hipStars, SkyPoint plotCentre, JulianDate epoch, double fieldRadius) Append stars from the Hipparcos data set to the given list.
void	Tycho.load(java.util.List<Star> stars, java.util.Map<java.lang.String,Star> hipStars, SkyPoint plotCentre, JulianDate epoch, double fieldRadius) Append stars from the Tycho data set to the given list.

Constructors in net.grelf.astro with parameters of type JulianDate

Constructor and Description
StarChart(java.lang.String title, RA ra, Dec dec, Epoch equinox, JulianDate epoch, double fieldWidthDegrees, boolean showVariables, boolean showChartCentre, StarChartSource source) If the title is null then one is constructed from the data (so many degrees around position).
StarChart(java.lang.String title, RA ra, Dec dec, Epoch equinox, JulianDate epoch, double fieldWidthDegrees, StarChartSource source) Use this constructor if you always want to mark variable stars and the chart centre.