Astronomy...

[Marcel]

Hi Salvomic
We can calculate Delta T with some analytical way but this is not always precise. In fact we know the value of Delta T after the year. For instance, we will know the value for the year 2015, in 2016! This is a correction or a difference between two times scales.

In my app's, many data are in variable associate with the App. You can see these var if you click on the "var" tab in the conn kit. At this point this is more complex than your technique because many calculations most been done with these data in a FOR statement. If you check for the book of Jean Meeus on the internet, you will learn how to use that data.
Marcel