ajd()
public
Returns the astronomical Julian day number.
This is a fractional number, which is not adjusted by the offset.
DateTime.new(2001,2,3,4,5,6,'+7').ajd
DateTime.new(2001,2,2,14,5,6,'-7').ajd
static VALUE
d_lite_ajd(VALUE self)
{
get_d1(self);
return m_ajd(dat);
}