Charles Dillon Perrine (July 28, 1867 – June 21, 1951) was an American-Argentine astronomer. July 28 is the 209th day (210th in leap years) of the year in the Gregorian Calendar, with 156 days remaining. ... 1867 (MDCCCLXVII) was a common year starting on Tuesday (see link for calendar). ... June 21 is the 172nd day of the year (173rd in leap years) in the Gregorian calendar, with 193 days remaining. ... 1951 (MCMLI) was a common year starting on Monday; see its calendar. ... An astronomer or astrophysicist is a scientist whose area of research is astronomy or astrophysics. ...

Born in Ohio, he worked at Lick Observatory from 1893 to 1909 and then was director of the Argentine National Observatory (today, Observatorio Astronómico de Córdoba) [1] in Argentina from 1909 until 1936. Official language(s) None Capital Largest city Columbus Columbus (largest metropolitan area is Cleveland) Area  Ranked 34th  - Total 44,825 sq. ... The Lick Observatory is an astronomical observatory, owned and operated by the University of California. ... 1893 (MDCCCXCIII) was a common year starting on Sunday (see link for calendar). ... 1909 (MCMIX) was a common year starting on Friday (see link for calendar). ... 1909 (MCMIX) was a common year starting on Friday (see link for calendar). ... 1936 (MCMXXXVI) was a leap year starting on Wednesday (link will take you to calendar). ...

In 1901, he and George Ritchey observed the apparent superluminal motion in the nebulosity surrounding Nova Persei 1901. 1901 (MCMI) was a common year starting on Tuesday (see link for calendar) of the Gregorian calendar (or a common year starting on Wednesday of the 13-day-slower Julian calendar). ... Ritchey 24 reflecting Telescope George Willis Ritchey (December 31, 1864 – November 4, 1945) was an American optician and telescope maker and astronomer (educated as a furniture maker) born at Tuppers Plains, Ohio. ... In astronomy, superluminal motion is the apparently faster-than-light motion seen in some radio galaxies, quasars and recently also in some galactic sources called microquasars. ... GK Persei (also Nova Persei 1901) was a bright nova occuring in 1901 in Perseus. ...

He discovered two moons of Jupiter, today known as Himalia (in 1904) and Elara (in 1905). They were simply designated "Jupiter VI" and "Jupiter VII" and were not given their present names until 1975. Moons of solar system scaled to Earths Moon A natural satellite is a moon (not capitalized), that is, any natural object that orbits a planet. ... Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... Atmospheric pressure 0 kPa Himalia (hye-mal-ee-a, also hi-mahl-ee-a, IPA , ; Greek ‘Ιμαλíα) is a moon of Jupiter. ... 1904 (MCMIV) was a leap year starting on a Friday (link will take you to calendar). ... Atmospheric pressure 0 kPa Elara (ee-lur-a or ee-lair-a, IPA or , Greek Ελάρη) is a moon of Jupiter. ... 1905 (MCMV) was a common year starting on Sunday (see link for calendar). ... 1975 (MCMLXXV) was a common year starting on Wednesday (the link is to a full 1975 calendar). ...

He co-discovered the lost periodic comet 18D/Perrine-Mrkos and several other comets. Antonín Mrkos later named the asteroid 6779 Perrine after him. Comet Hale-Bopp For other uses, see Comet (disambiguation). ... 18D/Perrine-Mrkos is a periodic comet in our solar system, originally discovered by the American-Argentine astronomer Charles Dillon Perrine (Lick Observatory, California, USA) on December 9, 1896. ... Antonín Mrkos (January 27, 1918 – May 29, 1996) was a Czech astronomer. ... An asteroid is a small, solid object in our Solar System, orbiting the Sun. ...

He promoted the study of astrophysics in Argentina and pushed for the construction of a large telescope (the Bosque Alegre telescope), which however was not completed until 1942 (he had retired in 1936). He remained in Argentina after retirement and died there, in Villa General Mitre (which has since been renamed to its original name of Villa del Totoral). He is buried in the cementerio disidente in the city of Córdoba. Spiral Galaxy ESO 269-57 // Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties (luminosity, density, temperature and chemical composition) of astronomical objects such as stars, galaxies, and the interstellar medium, as well as their interactions. ... This article is about the year. ... 1936 (MCMXXXVI) was a leap year starting on Wednesday (link will take you to calendar). ... Downtown Córdoba. ...

External links

Obituaries

• MNRAS 112 (1952) 273
• Nature 168 (1951) 409
• Popular Astronomy 59 (1951) 388
• PASP 63 (1951) 259