James Clerk Maxwell Telescope

With a diameter of 15m the James Clerk Maxwell Telescope (JCMT) is the largest astronomical telescope in the world designed specifically to operate in the submillimeter wavelength region of the spectrum. The JCMT is used to study our Solar System, interstellar dust and gas, and distant galaxies. It is situated close to the summit of Mauna Kea, Hawaii, at an altitude of 4092m. (more)

Latest News

Flexible Observing

Call for Proposals - Semester 13B (closed; 01-Apr-2013) The JCMT Newsletter is relaunched [pdf]  (1-Feb-2013) JCMT and UKIRT Break Publication Records Again in 2012  (29-Jan-2013) SCUBA-2 References Update (22-Jan-2013) Public Release of SCUBA-2 commissioning data (08-Nov-2012) Note to the Community Board Meeting June 2012 Press Release: Measuring the universe's 'exit door' [MIT] (27-Sep-2012) Appointment of Associate Director JCMT (26-Sep-2012) Potential Employment Opportunities at the JAC (06-Sep-2012) Semester 13A JCMT Call for proposals deadline 20-Sep-2012 (closed) Director JAC Awarded Honorary Degree (12-June-2012) Older News Items

Download the latest version of the JCMT Observing Tool. Detailed descriptions of observing modes are also available here. OMP Access to your Project Observing at the JCMT Schedules Starlink software collection

The JCMT is supported by the Science and Technology Facilities Council and the National Research Council Canada. It is overseen by the JCMT Board.

Acknowledging JCMT Data