Thanks for that, Patrick. I now have the 1986 elements so I'll punch them in and see what happens!
cheers, --geoff --- In [email protected], Patrick Chevalley <p...@...> wrote: > > Hi, > > OK, I not remarked you want to show the comet position in 1986. > > V3 check that the elements are valid for the date of the chart. I arbitrarily > set the limit to a little less than three years from the date of the > elements. This is because the comet orbit are perturbed and the elements > change over the time. > > What is also new in V3 is the capability to load elements valid for different > dates for the same object. > The best solution for you is to find 1986 elements of Halley, they will be > used automatically between 1983 and 1989. The 2010 elements are automatically > used between 2007 and 2013. > > So when you try to use 2010 elements for a date in 1986 the program ignore > the data and give a message that element are not loaded. > > But sometime an imprecise position is better than nothing, so I do a change > to give a warning message but use the elements when they are too old. > Up to you to appreciate the error in position and not report a bug if the > position is given some arc minutes away from the position on your pictures :-) > > You can get the changed version here: > http://www.ap-i.net/skychart/en/development_version > > Patrick >
