|Discovered by||Johann Palisa|
|Discovery date||March 18, 1874|
|Minor planet category||Main belt|
|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)|
|1262.933 d (3.46 a)|
Average orbital speed
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.
- Yeomans, Donald K., 136 Austria, JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
- Schober, H. J. (January 1983), Rotation periods and lightcurves of the asteroids 136 Austria and 238 Hypatia, Astronomy and Astrophysics 117 (2): 362–364, Bibcode:1983A&A...117..362S.
- Albrecht, R. et al. (July 2001), Early asteroid research in Austria, Planetary and Space Science 49 (8): 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: 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, Icarus 175 (1): 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
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