François BLATEYRON wrote:
>
> Hi dear gnomonists...
>
> Can someone help me with the calculation of the equation of time ?
Dear François,
I beg your pardon for my delay, but I have been very
busy in the last hours, since I have been shovelling
snow away..
I agree with the Roger Sinnot and Fer De Vries remarks;
the Explanatory Supplement (1961-1977 editions) gives for
the mean longitude of perihelion the expression
w = 101° 13' 15".04 + 6189".03 * T + 1".63 * T^2
where the time interval from the epoch is denoted by T and
measured in Julian centuries of 36525 ephemeris days, that
is to say
T = (JD - 2415020.0) / 36525
Everything else seems to be okay; happy year to all!
Paolo GREGORIO
