/usr/share/kstars/neptune.B3.vsop is in kstars-data 5:2.9.4-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | 0.00000004131 3.06928911462 38.13303563780
0.00000000143 4.00453590187 36.64856292950
|