func ExampleApproxAnnualPrecession() {
// Example 21.a, p. 132.
eq := &coord.Equatorial{
base.NewRA(10, 8, 22.3).Rad(),
base.NewAngle(false, 11, 58, 2).Rad(),
}
epochFrom := 2000.0
epochTo := 1978.0
Δα, Δδ := precess.ApproxAnnualPrecession(eq, epochFrom, epochTo)
fmt.Printf("%+.3d\n", base.NewFmtHourAngle(Δα.Rad()))
fmt.Printf("%+.2d\n", base.NewFmtAngle(Δδ.Rad()))
// Output:
// +3ˢ.207
// -17″.71
}
func ExampleApproxAnnualPrecession() {
// Example 21.a, p. 132.
eq := &coord.Equatorial{
unit.NewRA(10, 8, 22.3),
unit.NewAngle(' ', 11, 58, 2),
}
epochFrom := 2000.0
epochTo := 1978.0
Δα, Δδ := precess.ApproxAnnualPrecession(eq, epochFrom, epochTo)
fmt.Printf("%+.3d\n", sexa.FmtHourAngle(Δα))
fmt.Printf("%+.2d\n", sexa.FmtAngle(Δδ))
// Output:
// +3ˢ.207
// -17″.71
}