(321) Florentina
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Asteroid (321) Florentina |
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| A three-dimensional model of (321) Florentina based on its light curve | |
| Properties of the orbit ( animation ) | |
| Orbit type | Main belt asteroid |
| Asteroid family | Koronis family |
| Major semi-axis | 2.89 AU |
| eccentricity | 0.05 |
| Perihelion - aphelion | 2.75 AU - 3.02 AU |
| Inclination of the orbit plane | 2.59 ° |
| Length of the ascending node | 40.2 ° |
| Argument of the periapsis | 36.2 ° |
| Time of passage of the perihelion | October 26, 2019 |
| Sidereal period | 4 a 330 d |
| Physical Properties | |
| Medium diameter | 28 km |
| Albedo | approx. 0.4 |
| Rotation period | 2 h 52 min |
| Absolute brightness | 10.1 mag |
| Spectral class | S. |
| history | |
| Explorer | Johann Palisa |
| Date of discovery | October 15, 1891 |
| Another name | 1959 RS |
| 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. | |
(321) Florentina is an asteroid of the main asteroid belt , which on 15 October 1891 by Johann Palisa the Observatory of Wien was discovered. The name comes from Palisa's daughter Florentina.
Florentina moves around the sun at a distance of 2.75 ( perihelion ) to 3.02 ( aphelion ) astronomical units in 4.90 years . The orbit is inclined 2.59 ° to the ecliptic , the orbit eccentricity is 0.05.
Florentina is a member of the Koronis family and has a diameter of about 28 kilometers. The asteroid has a bright, silicate-rich surface with an albedo of 0.4 and rotates around its own axis in around 2 hours and 52 minutes.
A group of astronomers, including Lucy d'Escoffier Crespo da Silva and Richard P. Binzel , used observations from 1998 to 2000 to determine the spin-vector alignment of these asteroids, including (277) Elvira. The joint work resulted in the development of 61 new individual rotating light curves to complement previously published observations.
See also
Individual evidence
- ↑ (321) Florentina. In: Dictionary of Minor Planet Names. Springer, Berlin, Heidelberg, 2003, ISBN 978-3-540-00238-3 , pp. 42 , doi : 10.1007 / 978-3-540-29925-7_322 (English).
- ↑ Slivan, SM, Binzel, RP, Crespo da Silva, LD, Kaasalainen, M., Lyndaker, MM, Krco, M .: Spin vectors in the Koronis family: comprehensive results from two independent analyzes of 213 rotation lightcurves . In: Icarus . No. 162 , 2003, p. 285–307 , bibcode : 2003Icar..162..285S (English).