This is a scalable version of the Orbiter icon, adapted in SVG format (usually employed in the icons of the Linux system) that allows use without pixelate. Created especially for those who use Orbiter in Linux systems.
Drawn based on the original icon, with Inkscape.
If the link does not work, you can download it from here:
http://www.mediafire.com/download/tya68nue0grrpee/Orbiter.svg