136 Austria
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | March 18, 1874 |
| Designations | |
Named after | Austria |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 371.048 Gm (2.480 AU) |
| Perihelion | 313.089 Gm (2.093 AU) |
| 342.069 Gm (2.287 AU) | |
| Eccentricity | 0.085 |
| 1262.933 d (3.46 a) | |
Average orbital speed | 19.66 km/s |
| 14.588° | |
| Inclination | 9.570° |
| 186.536° | |
| 132.638° | |
| Physical characteristics | |
| Dimensions | 40.14 km[2] |
| Mass | 6.8×1016 kg |
| 0.0112 m/s² | |
| 0.0212 km/s | |
| 11.4969[1] h | |
| Albedo | 0.1459[2] |
| Temperature | ~184 K |
Spectral type | M[2] |
| 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.[3] 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.[4] 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.[5]
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.[2] As of 2013, the estimated rotation period is 11.4969[6] hours.
References
- 1 2 Yeomans, Donald K., "136 Austria", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
- 1 2 3 4 Schober, H. J. (January 1983), "Rotation periods and lightcurves of the asteroids 136 Austria and 238 Hypatia", Astronomy and Astrophysics 117 (2), pp. 362–364, Bibcode:1983A&A...117..362S.
- ↑ Albrecht, R.; et al. (July 2001), "Early asteroid research in Austria", Planetary and Space Science 49 (8), pp. 777–779, Bibcode:2001P&SS...49..777A, doi:10.1016/S0032-0633(01)00027-7.
- ↑ Clark, B. E.; et al. (March 1994), "Infrared Spectral Observations of Smaller (50 km) Main Belt S, K, and M Type Asteroids", Abstracts of the 25th Lunar and Planetary Science Conference, held in Houston, TX, 14–18 March 1994, pp. 265–266, Bibcode:1994LPI....25..265C.
- ↑ Hardersen, Paul S.; Gaffey, Michael J.; Abell, Paul A. (January 1983), "Near-IR spectral evidence for the presence of iron-poor orthopyroxenes on the surfaces of six M-type asteroids" (PDF), Icarus 175 (1), pp. 141–158, Bibcode:2005Icar..175..141H, doi:10.1016/j.icarus.2004.10.017, retrieved 2013-03-30.
- ↑ Behrend, Raoul, Courbes de rotation d'astéroïdes et de comètes (in French), Observatoire de Genève, retrieved 2013-03-30
External links
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