(319) Leona
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Asteroid (319) Leona |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Major semi-axis | 3,401 AU |
| eccentricity | 0.2191 |
| Perihelion - aphelion | 2.656 AU - 4.146 AU |
| Inclination of the orbit plane | 10.57 ° |
| Length of the ascending node | 185.0 ° |
| Argument of the periapsis | 228.1 ° |
| Time of passage of the perihelion | April 20, 2017 |
| Sidereal period | 6 a 100 d |
| Mean orbital velocity | 16.0 km / s |
| Physical Properties | |
| Medium diameter | 49.943 ± 0.477 km |
| Albedo | 0.085 ± 0.005 |
| Absolute brightness | 10.1 mag |
| history | |
| Explorer | A. Charlois |
| Date of discovery | October 8, 1891 |
| 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. | |
(319) Leona is an asteroid of the main belt , the October 8, 1891 by Auguste Charlois was discovered.
The orbit of Leona has a semi-major axis of 3.4 astronomical units and its orbital period is 6.3 years. The orbit is inclined 10.6 ° to the ecliptic , the orbital eccentricity is 0.22. Leona's mean diameter is estimated at around 49.9 kilometers. The asteroid has a dark surface with an albedo of 0.085.
The star Betelgeuse is covered by (319) Leona
A rare occultation of the bright star Betelgeuse by (319) Leona will take place on December 12, 2023 . This star occultation can be observed from Turkey , Greece and Sicily . Since Betelgeuse has an angular diameter of 0.050 ″ when viewed from the earth , but the asteroid at the time of the occultation will happen to be seen at the almost identical angle of approx. 0.052 ″ (with an assumed diameter of 68 km) the event differ significantly from ordinary stellar occultations. It is of particular scientific interest, in particular with its help it should be possible to precisely determine the brightness distribution over the star disc of Betelgeuse.
See also
Individual evidence
- ↑ Denis Denissenko: Unique occultations . 2004. Archived from the original on December 16, 2012. Retrieved October 28, 2012.