根据当前时间获取土星黄道经度Java代码
时间: 2024-05-12 22:20:20 浏览: 14
以下是获取当前时间的土星黄道经度的Java代码:
```
import java.util.Calendar;
public class SaturnLongitude {
public static void main(String[] args) {
Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH) + 1;
int day = calendar.get(Calendar.DAY_OF_MONTH);
int hour = calendar.get(Calendar.HOUR_OF_DAY);
int minute = calendar.get(Calendar.MINUTE);
int second = calendar.get(Calendar.SECOND);
double jd = getJulianDay(year, month, day, hour, minute, second);
double t = (jd - 2451545) / 36525;
double l0 = 174.873174;
double lp = 76.6799205 + 0.0000005777 * t;
double d = 83.534291 + 0.00008585 * t;
double v = 203.4889554 + 0.00013695 * t;
double e = 9.557581354 + 0.00005182 * t;
double m = mod(316.967271 + 0.03345418 * jd, 360);
double p = 38.393682 + 0.000004 * jd;
double n = 113.6655 + 0.8771 * t;
double c1 = Math.sin(Math.toRadians(lp)) * Math.sin(Math.toRadians(e));
double c2 = Math.cos(Math.toRadians(lp)) * Math.cos(Math.toRadians(e));
double c3 = Math.toRadians(n - lp);
double l = l0 + lp + (0.001 * c1 - 0.0007 * c2) * Math.sin(c3) - 0.0004 * Math.sin(Math.toRadians(2 * c3));
double b = (0.002 * c1 + 0.0007 * c2) * Math.cos(c3) - 0.0004 * Math.cos(Math.toRadians(2 * c3));
double r = 9.557581354 * (1 - e * e) / (1 + e * Math.cos(Math.toRadians(v + p)));
double x = r * Math.cos(Math.toRadians(b)) * Math.sin(Math.toRadians(l - m));
double y = r * (Math.sin(Math.toRadians(b)) * Math.cos(Math.toRadians(d)) - Math.cos(Math.toRadians(b)) * Math.sin(Math.toRadians(d)) * Math.cos(Math.toRadians(l - m)));
double z = r * (Math.sin(Math.toRadians(b)) * Math.sin(Math.toRadians(d)) + Math.cos(Math.toRadians(b)) * Math.cos(Math.toRadians(d)) * Math.cos(Math.toRadians(l - m)));
double lambda = Math.toDegrees(Math.atan2(y, x));
double beta = Math.toDegrees(Math.atan2(z, Math.sqrt(x * x + y * y)));
double saturnLongitude = mod(lambda + 180, 360);
System.out.println("Saturn longitude at " + year + "/" + month + "/" + day + " " + hour + ":" + minute + ":" + second + " UTC is " + saturnLongitude + " degrees.");
}
private static double getJulianDay(int year, int month, int day, int hour, int minute, int second) {
if (month <= 2) {
year -= 1;
month += 12;
}
int a = year / 100;
int b = 2 - a + (a / 4);
int jd = (int) (365.25 * (year + 4716)) + (int) (30.6001 * (month + 1)) + day + b - 1524;
double jdFraction = (double) hour / 24 + (double) minute / 1440 + (double) second / 86400;
return jd + jdFraction;
}
private static double mod(double x, double y) {
return x - y * Math.floor(x / y);
}
}
```
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