When is the next Thuban & companion Eclipse: Date and Time??
You can use VSX to get an ephemeris.
Go to the star's page:
In the Epoch field you will find a link called "Ephemeris".
By clicking on it you will see a list of eclipses with their times in UT.
You will have the start, mideclipse and end of the eclipse times.
The next one is on:
03 Jun 2020 19:40
04 Jun 2020 03:41
04 Jun 2020 11:43
I hope it helps.
thanks for your comment. I deleted the SDSS photometry, it belongs to the correct star but SDSS saturates at mag 14 or so and then any information for a 4th mag. star is unseless.