/**
* @covers Marando\AstroDate\Epoch::B1900
*/
public function testB1900()
{
$epoch = Epoch::B1900();
$this->assertEquals(1900, $epoch->year);
$this->assertEquals(YearType::Besselian(), $epoch->type);
$this->assertEquals(2415020.31352, $epoch->jd, 'jd', 0.0001);
}
/**
* Finds the year of this epoch
* @return float
*/
protected function getYear()
{
$year = 0;
if ($this->type == YearType::Besselian()) {
$year = 1900 + ($this->jd - Epoch::B1900()->jd) / static::DaysBesselianYear;
} else {
$year = 2000 + ($this->jd - Epoch::J2000()->jd) / static::DaysJulianYear;
}
return round($year, 6);
}