.png) A three-dimensional model of 321 Florentina based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 15 October 1891 |
| Designations | |
| (321) Florentina | |
| Pronunciation | /flɒrənˈtaɪnə/ |
| Main belt (Koronis) | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 118.15 yr (43153 d) |
| Aphelion | 3.01879 AU (451.605 Gm) |
| Perihelion | 2.7543 AU (412.04 Gm) |
| 2.88657 AU (431.825 Gm) | |
| Eccentricity | 0.045806 |
| 4.90 yr (1,791.3 d) | |
| 120.99° | |
| 0° 12m 3.492s / day | |
| Inclination | 2.5876° |
| 40.224° | |
| 37.310° | |
| Physical characteristics | |
| Dimensions | 27.23±1.5 km |
| 2.871 h (0.1196 d) | |
| 0.2296±0.028 | |
| 10.1 | |
321 Florentina is anS-type (stony)main beltasteroid with a diameter of28 km.[2] It was discovered byJohann Palisa on 15 October 1891 inVienna. He named the asteroid for his daughter, Florentine.[3] Between 1874 and 1923, Palisa discovered a total of 122 asteroids.
This asteroid is a dynamic member of theKoronis family. It is orbiting the Sun at a distance of2.887 AU with aneccentricity (ovalness) of 0.046 and anorbital period of 4.90 yr. Theorbital plane is inclined at an angle of 2.59° to the plane of theecliptic.[1]Photometric data collected during the asteroidopposition of 2011 was used to construct alight curve that displayed arotation period of2.870±0.001 h. This is consistent with previous rotation estimates.[2]
A group of astronomers, includingLucy d'Escoffier Crespo da Silva, contributed data toward the discovery of spin-vector alignments in the Koronis family, which includes (321) Florentina. This was based on observations made between 1998 through 2000. The collaborative work resulted in the creation of 61 new individual rotation lightcurves to augment previous published observations.[4]
