The UT offers minors during the second semester, for students who couldn't during the first semester. Be aware that the number of minors that are being offered, is a lot less compaired to the first semester.
At the bottom of this page you can find a link to an overview of the minors of the second semester (course year 2018-2019). In the minor tool of options you can see which minors you are allowed to take by selecting your educational program. Make sure you already have obtained the (if applicable) assumed previous knowledge, which can be found in the course information (click on the name of the minor in the tool of options). Around November the offer of the second semester of 2019-2020 will be visible in the tool of options. The minors that are now shown, are applicable for course year 2018-2019.
Registration for a minor in the second semester was possible from the 3rd of December 2018 up to and including the 14th of January 2019. Registration for a minor via Osiris can only be done during the minor registration period. There's no need to register for the corresponding module, this will be taken care of for you. If you don't know how to register for a minor, look here for an explanation.
The registration period for the minors of the second semester of 2019-2020 will be published around October on this website.