The below timeline reflects the status of the project as of June 2019.
This information will be updated when a forward path to construction has been defined by TMT partners, taking into account the outcome of the on-going Decadal Survey on Astronomy and Astrophysics (Astro2020).
Power is generated on site and in its final form.
First on sky test using 40 segments at prime focus completed
First on sky test using 40 segments at Nasmyth focus completed
Primary mirror with 492 segments aligned and phased on sky with APS, M2 and M3
Observatory is completed and ready for science!!