Been working on this one off and on for a while now.
Threejs based orbit viewer: https://catalina.lpl.arizona.edu/css-orbit-view
Has a lot of features. Easy to get started, just hit submit to view the first interstellar object ever found. 1I/Oumuamua.
You can share links that will plot objects.
Here is interstellar comet 2I/Borisov:
If you know the designation of the object, you can use the MPC # box.
2019 WW4 for a newly found PHA
C/2017 K2 for a parabolic comet
1P for Halley’s comet
Click “From MPCORB”
On my laptop, decent GPU, I can get about 500 objects smoothly animating.