/usr/share/kstars/neptune.R4.vsop is in kstars-data 4:15.12.3-0ubuntu2.
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 | 0.00000004227 2.40375758563 477.3308354552
0.00000004333 0.10459484545 395.578702239
0.00000003545 4.78431259422 1028.3624415522
0.00000003154 3.88192942366 505.7850234584
0.00000003016 1.03609346831 189.3931538018
0.00000002294 1.10879658603 182.279606801
0.00000002295 5.67776133184 168.0525127994
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