Schwarzschild radius of the Sun (au)
= 2 * 1.32712440041e20 / (2.99792458e8)^2 / 1.49597870700e11
Light time for 1 au (s)
2Pi
Arcseconds to radians
Astronomical unit (m, IAU 2012)
Seconds per day.
Speed of light (au per day)
Degrees to radians
Reference epoch: f64 = J2000.0;, Julian Date
Days per Julian century
Days per Julian millennium
Julian Date of Modified Julian Date zero
Reference epoch: f64 = J2000.0;, Modified Julian Date
1977 Jan 1.0 as MJD
Days per Julian year
Milliarcseconds to radians
Pi
Radians to arcseconds
Radians to degrees
Seconds of time to radians
Length of tropical year B1900: f64 = days;
L_B = 1 - d(TDB)/d(TCB), and TDB (s) at TAI 1977/1/1.0
L_G = 1 - d(TT)/d(TCG)
TT minus TAI (s)
Arcseconds in a full circle
Reference ellipsoids