Jupiter's Moons on Nokia Phones

Is there any application that can run on java-enabled mobile phones which
can plot the Moons of Jupiter?

I have searched the internet and have been unable to find one.

I'm thinking about putting my programming hat on again and develop one
similar my "Planets" application on www.cpac.org.uk

I have a primative Nokia 6310i and thought it might be nice if it could plot
Jupiter's moons. I dont really want to "re-invent the wheel" if one already
exists.

I am not making any promises as there are a few restrictions to overcome...
(eg: the version of Java which runs on phones do not have the full set of
Maths/trigonometry functions. That might be a "show-stopper" so to speak as
it would be impossible to do the necessary calculations.)

I also dont really want to spend too many hours on the project if people
cant see a use for it.

Would it be useful or would I be wasting my time?

Brendan Murphy
www.cpac.org.uk