Astronomical database

[pvaz]

I know there are a few software developers here. So does anyone know a free astronomical database? A resource with some typical astronomical algorithms would be nice too.

Maybe if I studie Stellarium's source code I'll find answers to all this questions. You see, I got this idea to make an App for Android with the following features:

- Full catalog of NGC and IC objects, planets and double stars

- Realtime conversion from equatorial to horizontal coordinates

- Filtering by subsets of the 2 mentioned catalogs (Messier, Herschel 400, Caldwell, etc)

- Create observing lists

- Observation logs (generating history associated with the objects)

- Sync data to google account for backup

Right now this is a rough idea and I'm not even familiar with Android SDK to even estimate how much time it would take. But it seams like an interesting thing to do on my free time.

[themos]

SIMBAD Astronomical Database