Whipple observatory hosts the MMT Observatory, which is jointly run by SAO and the University of Arizona and houses a 6.5-meter telescope. The observatory also has 1.5- and 1.2-meter reflectors and a second 1.3-meter reflector named PAIRITEL (Peters Automated IR Imaging Telescope, ex-2MASS ). Also on site is the HATNet (Hungarian-made Automated Telescope) network, the MEarth Project, and four 0.7-meter telescopes of the automated Miniature Exoplanet Radial Velocity Array (MINERVA).