63 Ausonia
Ausonia (minor planet designation: 63 Ausonia) is a stony Vestian asteroid from the inner region of the asteroid belt, approximately 100 kilometers (60 miles) in diameter. It was discovered by Italian astronomer Annibale de Gasparis on 10 February 1861, from the Astronomical Observatory of Capodimonte, in Naples, Italy. The initial choice of name for the asteroid was "Italia", after Italy, but this was modified to Ausonia, an ancient classical name for the Italian region.
| Discovery | |
|---|---|
| Discovered by | A. de Gasparis |
| Discovery site | Capodimonte Obs. |
| Discovery date | 10 February 1861 |
| Designations | |
MPC designation | (63) Ausonia |
| Pronunciation | /ɔːˈsoʊniə/ |
Named after | Ausonia (ancient name for Italy) |
Alternative designations | 1947 NA · 1948 WT |
Minor planet category | main-belt · (inner) Vesta |
| Adjectives | Ausonian /ɔːˈsoʊniən/ |
| Orbital characteristics | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 156.34 yr (57,104 days) |
| Aphelion | 2.6993 AU |
| Perihelion | 2.0910 AU |
Semi-major axis | 2.3951 AU |
| Eccentricity | 0.1270 |
Orbital period (sidereal) | 3.71 yr (1,354 days) |
Mean anomaly | 340.16° |
Mean motion | 0° 15m 57.24s / day |
| Inclination | 5.7763° |
Longitude of ascending node | 337.75° |
| 295.78° | |
| Physical characteristics | |
| Dimensions | c/a = 0.45±0.02 |
Mean diameter | 93±3 km
87.5±1.1 km 90±18 km 94.4±7.2 km 103.0±2.8 km 103.14±2.4 km |
| Mass | (1.2±0.2)×1018 kg (1.53±0.15)×1018 kg |
Mean density | 2.96±0.61 g/cm3 3.46±0.86 g/cm3 |
Synodic rotation period | 9.282±0.003 h 9.29 h 9.293±0.001 h 9.294 h 9.29757 h 9.29758 h 9.29759 h 9.29766 h 9.298 h 9.299 h |
| 0.195 (calculated) 0.125±0.016 0.1586±0.008 0.1591±0.0277 0.232±0.008 0.25±0.18 | |
| Tholen = S SMASS = Sa S B–V = 0.916 U–B = 0.500 | |
| 7.55 | |
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