Julian class

Constructors

Julian(int year, double day)

Create a Julian date object from a year and day of year. Example parameters: year = 2001, day = 1.5 (Jan 1 12h)

Julian.fromFullDate(int year, int mon, int day, int hour, int min, {double sec = 0.0})

Create a Julian date object from a year , mon , day, hour and min.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

addDay(double day) → void

add day to the date

addHour(double hr) → void

add hr to the date

addMin(double min) → void

add min to the date

addSec(double sec) → void

add sec to the date

date() → double

fromJan1_00h_1900() → double

fromJan1_12h_1900() → double

fromJan1_12h_2000() → double

getComponent(int pYear, int pMon, double pDOM) → CDate

getComponent() Return requested components of date. Year : Includes the century. Month: 1..12 Day : 1..31 including fractional part

getDate() → double

return the date as Julian date

initialize(int year, double day) → void

Initialize the Julian object 1582 A.D.: 10 days removed from calendar 3000 A.D.: Arbitrary error checking limit

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

spanDay(Julian b) → double

spanHour(Julian b) → double

spanMin(Julian b) → double

spanSec(Julian b) → double

toGmst() → double

toGmst() Calculate Greenwich Mean Sidereal Time for the Julian date. The return value is the angle, in radians, measuring eastward from the Vernal Equinox to the prime meridian. This angle is also referred to as "ThetaG" (Theta GMST).

toLmst(double lon) → double

toLmst() Calculate Local Mean Sidereal Time for given longitude (for this date). The longitude is assumed to be in radians measured west from Greenwich. The return value is the angle, in radians, measuring eastward from the Vernal Equinox to the given longitude.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

isLeapYear(int y) → bool