Kiso Observatory

{{Short description|Observatory at Mt. Ontake, Japan}}

{{Infobox observatory

| name = Kiso Observatory

| organization = University of Tokyo

| location = Mount Ontake, Nagano Prefecture

| altitude = {{convert|1130|m|abbr=on}}

| established = 1974

| telescope1_name = Unnamed

| telescope1_type = 105 cm Schmidt telescope

| telescope2_name = K.3T

| telescope2_type = 30 cm robotic telescope

| telescope3_name =

| telescope3_type =

| telescope4_name =

| telescope4_type =

}}

Kiso Observatory ({{langx|ja|木曽観測所}}: Kiso Kansokujo) is an astronomical observatory located at Mt. Ontake in Japan. The observatory was founded in 1974, originally as a branch observatory of the Tokyo Astronomical Observatory, with the express objective of studying extra-galactic astronomical objects.{{cite web|title=Overview|url=http://www.ioa.s.u-tokyo.ac.jp/kisohp/OVERVIEW/overview_e.html|website=Kiso Observatory|publisher=Institute of Astronomy, School of Science, The University of Tokyo|accessdate=15 April 2016}} Since 1988, it has been maintained by the Institute of Astronomy, Faculty of Science, University of Tokyo ({{langx|ja|東京大学天文学教育研究センター}}). It is home to the 105 cm Schmidt Telescope. It is currently open for use by astronomers from all over the world.

In 2002, a 30 cm, fully automatic telescope was added with the designation K.3T (Kiso 0.3-meter Telescope). It is mainly used in the observation of variable stars. It has been automated to aid in the making of numerous repeat observations over long periods of time.{{cite web|title=東京大学天文学教育研究センター木曽観測所|url=http://www3.nagasaki-joshi.ac.jp/~web06la/05/newpage18.html|website=天文台の紹介|publisher=長崎 女子短期大学|accessdate=15 April 2016|language=Japanese}}