Orbits get culled too aggressively

[ajtribick]

Describe the bug
Depending on viewing direction, orbits can disappear even though they should be in the frame.

To Reproduce
Steps to reproduce the behavior:

1. Go to cel://Follow/Sol:Earth/2023-07-22T20:36:44.25211Z?x=AECdFrZbGFH9/////////w&y=ADIujAW3ePn//////////w&z=AACAngAqi0P5/////////w&ow=0.9542919&ox=0.00071426365&oy=-0.29887474&oz=-0.000659616&select=Sol:Earth&fov=39.815548&ts=1&ltd=0&p=0&rf=111015863&nrf=255&lm=129&tsrc=0&ver=3
2. Left-drag along the ecliptic
3. After rotating about 90°, the planetary orbits disappear.

Expected behavior
Orbits remain visible

Screenshots

Desktop (please complete the following information):

• OS: Kubuntu 23.04, X11
• Frontend: Qt5
• Version: current master

Additional context
Haven't found a good commit to bisect this. Earliest I have checked so far is 9a98952 but the bug is still there.