(8759) Porzana
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Asteroid (8759) Porzana |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Middle main belt asteroid |
| Asteroid family | Eunomia family |
| Major semi-axis | 2.6660 AU |
| eccentricity | 0.1922 |
| Perihelion - aphelion | 2.1535 AU - 3.1786 AU |
| Inclination of the orbit plane | 13.7530 ° |
| Length of the ascending node | 21.7576 ° |
| Argument of the periapsis | 305.6338 ° |
| Time of passage of the perihelion | January 21, 2017 |
| Sidereal period | 4.35 a |
| Mean orbital velocity | 18.24 km / s |
| Physical Properties | |
| Medium diameter | 5.125 km (± 0.225) |
| Albedo | 0.293 (± 0.065) |
| Absolute brightness | 13.5 likes |
| history | |
| Explorer |
Cornelis Johannes van Houten , Ingrid van Houten-Groeneveld , Tom Gehrels |
| Date of discovery | October 17, 1960 |
| Another name | 7603 PL , 1981 KO, 1982 UN 10 , 1995 SC 30 |
| 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. | |
(8759) Porzana is an asteroid of the central main belt , which was discovered on October 17, 1960 by the Dutch astronomer couple Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld . The discovery came about as part of the Palomar-Leiden survey , during which Tom Gehrels examined field plates recorded at the University of Leiden with the 120 cm Oschin Schmidt telescope of the Palomar observatory .
The mean diameter of the asteroid was calculated to be 5.125 km (± 0.225).
The asteroid belongs to the Eunomia family, a group named after (15) Eunomia , to which probably five percent of the asteroids in the main belt belong. The timeless (non- osculating ) orbital elements of (8759) Porzana are almost identical to those of three smaller ones, assuming the absolute brightness of 15.6, 15.5 and 16.5 compared to 13.5, asteroids: (138237) 2000 FQ 28 , (141800) 2002 NO 33 and (357073) 2001 RK 20 .
(8759) Porzana is named after the spotted marsh , whose scientific name is Porzana porzana . At the time the asteroid was named on February 2, 1999, the spotted mullet was on the Dutch Red List of Endangered Species .
Web links
- (8759) Porzana in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (8759) Porzana in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
- Discovery Circumstances of (8759) Porzana according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)