Astro-Timorese philosophy, or Timorese Astronism, refers to the presence of Astronism in East Timor under management and philosophical jurisdiction of The Institution of The Philosophy of Millettism for the Democratic Republic of Timor-Leste, a national subsidiary for the worldwide Astronist Institution. 

The Institution of the Philosophy of Millettism for the Democratic Republic of Timor-Leste oversees the construction and maintenance of observatories and planetariums throughout its jurisdiction. East Timor is split into thirteen municipalities and is set to hold one Grand Observatory in the capital city of Dili.

This national branch of The Institution of The Philosophy of Millettism manages the official representation and depiction of Astronism throughout this territory, including efforts to protect the identity of the philosophy with the intention of further disseminating it throughout the territory. It is The Institution alone that is granted the status of proprietor to the philosophy in this territory as any other organisations or institutions proclaiming such a role are deemed as unauthorised proprietors and are therefore considered as part of the anti-Institutionist movement. 

History of Astronism in Timor-Leste

Astronists are not currently recognised as a valid religious group by the government in Timor-Leste. The Astronist Institution has few concerns regarding the religious liberties of Astronists in Timor-Leste, hence it has designated the country as apathetic in its 2020 Astronist Freedom report. The number of Astronists in Timor-Leste has been calculated at 100 people as of November 2019.