Prescott Observatory, Astronomical observatory in Prescott, United States

Prescott Observatory is an astronomical facility in the mountains of northern Arizona equipped with modern telescopes and observation instruments. The site sits at a high elevation that provides clear and stable conditions for viewing the night sky.

Paul G. Comba, an Italian-American computer scientist and amateur astronomer, built the observatory after retiring to Prescott in 1991; the Russian source dates its founding to 1994. From 1995 to 2001 he ran astrometric observations almost daily, publishing some 15,000 asteroid positions and more than 600 discoveries of minor planets. In mid-2010 he sold the house and observatory to Matt Francis, who refurbished it in 2011.

Paul G. Comba, an Italian-American computer scientist and amateur astronomer, was an active member of the Prescott Astronomy Club and wrote the Astronomical League's Asteroid Club Observing Guide. The observatory he built is a private facility, not open to visitors, and since 2010 it has been owned and operated by Matt Francis, who planned to use it for educational projects for schoolchildren.

The observatory is a private facility on a residential property and is not open to visitors; there are no tours or public viewing sessions. Its work is shared remotely: it contributes live celestial webcasts to the organization SLOOH. The dome holds a PlaneWave CDK 24-inch telescope with two Takahashi wide-field refractors, and a separate solar observatory uses a Lunt 152 solar telescope.

The observatory's own code in the Minor Planet Center catalogue is 684, and its founder Paul G. Comba is credited there with 644 numbered minor planets as of September 2013. The dome holds a PlaneWave CDK 24-inch telescope with two Takahashi wide-field refractors, and a separate solar observatory carries a Lunt 152 solar telescope. A JEOL 5800LV scanning electron microscope sits in a nano lab for cosmology research.