Frequently Asked Questions

Here are some questions we get often. Please suggest more by raising an issue in the Github Issue Tracker.

What is τ and how is it related to epoch of periastron?

We use τ to define the epoch of periastron as we do not know when periastron will be for many of our directly imaged planets. A detailed description of how τ is related to other quantities such as \(t_p\) is available: