(2550) Houssay
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Asteroid (2550) Houssay |
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| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Major semi-axis | 3.1915 AU |
| eccentricity | 0.1710 |
| Perihelion - aphelion | 2.6458 AU - 3.7372 AU |
| Inclination of the orbit plane | 10.3926 ° |
| Length of the ascending node | 158.5000 ° |
| Argument of the periapsis | 242.9226 ° |
| Time of passage of the perihelion | 3rd November 2016 |
| Sidereal period | 5.70 a |
| Mean orbital velocity | 16.69 km / s |
| Physical Properties | |
| Medium diameter | 22.379 (± 0.228) km |
| Albedo | 0.105 (± 0.015) |
| Absolute brightness | 11.5 likes |
| history | |
| Explorer | El Leoncito Observatory |
| Date of discovery | October 21, 1976 |
| Another name | 1976 UP 20 , 1970 QT, 1970 RV |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(2550) Houssay is an asteroid of the main outer belt that was discovered on October 21, 1976 at the El Leoncito Observatory, which is located at the Felix Aguilar Observatory ( IAU code 808) in the El Leoncito National Park, Argentina . The Yale University and Columbia University used the observatory as a branch to the southern sky to watch. Since 1990 it has been called "Observatorio Carlos Cesco". There were unconfirmed sightings of the asteroid as early as 1970 under the provisional designations 1970 QT and 1970 RV at the Crimean Observatory in Nautschnyj .
The mean diameter of the asteroid was calculated to be 22.379 (± 0.228) kilometers, the albedo as 0.105 (± 0.015).
(2550) Houssay was named on September 18, 1986 after the Argentine physiologist Bernardo Alberto Houssay (1887–1971), who received the Nobel Prize in Physiology or Medicine in 1947 , “for his discovery of the importance of the hormones of the anterior pituitary gland for sugar metabolism”. In the same year, the couple Gerty and Carl Ferdinand Cori were honored with the Nobel Prize for Physiology or Medicine , after whom the asteroid of the outer main belt (6175) was named Cori in 2000 . Also named after Bernardo Alberto Houssay was a lunar crater in the northern lunar hemisphere on January 22, 2009 : lunar crater Houssay .
Web links
- (2550) Houssay in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2550) Houssay in the Small-Body Database of the Jet Propulsion Laboratory (English).
- Discovery Circumstances by (2550) Houssay according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ (2550) Houssay at the IAU Minor Planet Center (English)
- ↑ The lunar crater Houssay in the Gazetteer of Planetary Nomenclature of the IAU (WGPSN) / USGS (English)