/usr/share/applications/timemachine.desktop is in timemachine 0.3.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | [Desktop Entry]
Name=JACK Timemachine
Exec=/usr/bin/timemachine
Terminal=false
Icon=/usr/share/timemachine/pixmaps/timemachine-icon.png
Type=Application
Categories=AudioVideo;Audio;
|