136 Austria
Austria (minor planet designation: 136 Austria) is a main-belt asteroid that was found by the prolific asteroid discoverer Johann Palisa on 18 March 1874, from the Austrian Naval Observatory in Pola, Istria. It was his first asteroid discovery and was given the Latin name of his homeland.
3D convex shape model of 136 Austria | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery site | Austrian Naval Obs. |
| Discovery date | 18 March 1874 |
| Designations | |
MPC designation | (136) Austria |
Named after | Austria |
Alternative designations | A874 FA; 1950 HT |
Minor planet category | main-belt · (inner) background |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 141.11 yr (51,539 d) |
| Aphelion | 2.4812 AU |
| Perihelion | 2.0927 AU |
Semi-major axis | 2.2869 AU |
| Eccentricity | 0.0849 |
Orbital period (sidereal) | 3.46 yr (1,263 d) |
Mean anomaly | 102.82° |
Mean motion | 0° 17m 6s / day |
| Inclination | 9.5788° |
Longitude of ascending node | 186.46° |
| 2024-Feb-24 | |
| 132.95° | |
| Physical characteristics | |
Mean diameter | 40.14±1.0 km 40.14 km |
| Mass | 6.8×1016 kg |
Synodic rotation period | 11.4969 h (0.47904 d) |
| 0.1459±0.007 0.1459 | |
| M | |
| 9.69 | |
Based upon its spectrum, it is classified as an M-type spectrum, although Clark et al. (1994) suggest it may be more like an S-type asteroid. It shows almost no absorption features in the near infrared, which may indicate an iron or enstatite chondrite surface composition. A weak hydration feature was detected in 2006.
Photometric observations of this asteroid at the European Southern Observatory in 1981 gave a light curve with a period of 11.5 ± 0.1 hours and a brightness variation of 0.40 in magnitude. As of 2013, the estimated rotation period is 11.4969 hours.