Julian class

Encapsulates a Julian date.

Constructors

Julian(double value)

Initialize the Julian date object.

const

Julian.fromDateTime(DateTime utc)

Create a Julian date object from a DateTime object. The time contained in the DateTime object is assumed to be UTC.

factory

Julian.fromYearDoy(int year, double doy)

Creates a Julian date from year and day-of-year.

factory

Properties

gmst → Angle

Calculate Greenwich Mean Sidereal Time for the Julian date.

no setter

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

value → double

The Julian date.

final

Methods

addDays(double day) → Julian

Adds days.

addHours(double hours) → Julian

Adds hours.

addMinutes(double min) → Julian

Adds minutes.

addSeconds(double sec) → Julian

Adds seconds.

fromJan0_12h_1900() → double

Dec 31.5 1899 = Dec 31 1899 12h UTC

fromJan1_00h_1900() → double

Jan 1.0 1900 = Jan 1 1900 00h UTC

fromJan1_12h_1900() → double

Jan 1.5 1900 = Jan 1 1900 12h UTC

fromJan1_12h_2000() → double

Jan 1.5 2000 = Jan 1 2000 12h UTC

lmst(Angle longitude) → Angle

Calculate Local Mean Sidereal Time for this Julian date at the given longitude.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toDateTime() → DateTime

Converts from Julian to DateTime.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited