NEAPLOT shows the path of a Near Earth Asteroid with respect to the rotating frame Sun-Earth. NEAPLOT performs a full numerical integration considering the Sun + 9 planets + the Near Earth Asteroid using EVORB and produces a graphic output using DISLIN graphic library from H. Michels (Max Planck Institut). It also generates a file with the evolution of the coordinates x, y, z and the distance to Earth and a file with details of close encounters with planets. It does not take into account the perturbations by the Moon. You can use the database NEA.DAT from MPC or you can introduce orbital elements by hand.

NEAPLOT2 shows projections on the ecliptic's plane (XY) where the Sun and Earth are represented by symbols (yellow and blue).

NEAPLOT3D shows more realistic three-dimensional views of the NEA's path where the Sun is represented by a yellow sphere and the Moon's orbit as a small red circle. The scale is preserved and the user can select the observer's position.

Instructions:

1) download and decompress the file neaplot3d.zip and/or neaplot2.zip
2) download the file NEA.DAT from Minor Planet Center
3) put both files in the same directory
4) execute neaplot3d.exe or neaplot2.exe