Halley - Electronic Catalogue of Comets is a free software for management and working with the comets database, containing Keplerian orbital elements, non-gravitational and physical parameters of the comets, additional parameters used in the improvement, and other data. The database is updated in case the new data become available. The tasks performed by the electronic catalogue, in addition to database management, include calculation of the orbital evolution of comets and visualization of comet dynamics, detection of close approaches with the major planets in a given time interval.
What's new in version 0.05
Numerical ephemerides JPL DE423 added (working ephemeris defined now in the program options).
Different input formats of the current epoch added.
Now the planet's radius can be taken into account when calculating the close approaches.
Added calculation of position and velocity in different coordinate systems.