136 Austria
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 18 March 1874 |
| Designations | |
|
Named after
|
Austria |
| Main belt | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 139.25 yr (50860 d) |
| Aphelion | 2.4802 AU (371.03 Gm) |
| Perihelion | 2.09294 AU (313.099 Gm) |
| 2.28657 AU (342.066 Gm) | |
| Eccentricity | 0.084680 |
| 3.46 yr (1262.9 d) | |
|
Average orbital speed
|
19.66 km/s |
| 291.827° | |
| 0° 17m 6.194s / day | |
| Inclination | 9.5792° |
| 186.463° | |
| 132.928° | |
| Earth MOID | 1.09323 AU (163.545 Gm) |
| Jupiter MOID | 2.74301 AU (410.348 Gm) |
| Jupiter Tisserand parameter | 3.578 |
| Physical characteristics | |
| Dimensions |
40.14±1.0 km 40.14 km |
| Mass | 6.8×1016 kg |
|
Equatorial surface gravity
|
0.0112 m/s² |
|
Equatorial escape velocity
|
0.0212 km/s |
| 11.4969 h (0.47904 d) | |
|
0.1459±0.007 0.1459 |
|
| Temperature | ~184 K |
| M | |
| 9.69 | |
136 Austria is a main-belt asteroid that was found by the prolific asteroid discoverer Johann Palisa on March 18, 1874, from the Austrian Naval Observatory in Pola, Istria. It was his first asteroid discovery and was given the Latin name of his homeland.
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.
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