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.[5] It was his first asteroid discovery and was given the Latin name of his homeland.
3D convex shape model of 136 Austria | |
| Discovery[1] | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery site | Austrian Naval Obs. |
| Discovery date | 18 March 1874 |
| Designations | |
| (136) Austria | |
Named after | Austria |
| A874 FA; 1950 HT | |
| main-belt[1][2] · (inner) background[3] | |
| Orbital characteristics[2] | |
| 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 |
| 2.2869 AU | |
| Eccentricity | 0.0849 |
| 3.46 yr (1,263 d) | |
| 102.82° | |
| 0° 17m 6s / day | |
| Inclination | 9.5788° |
| 186.46° | |
| 132.95° | |
| Physical characteristics | |
Mean diameter | 40.14±1.0 km[2] 40.14 km[4] |
| Mass | 6.8×1016 kg |
| 11.4969 h (0.47904 d)[2] | |
| 0.1459±0.007[2] 0.1459[4] | |
| M[4] | |
| 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.[6] 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.[7]
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.[4] As of 2013, the estimated rotation period is 11.4969[8] hours.
References
- ^ a b "136 Austria". Minor Planet Center. Retrieved 29 May 2018.
- ^ a b c d e "JPL Small-Body Database Browser: 136 Austria" (2018-02-26 last obs.). Jet Propulsion Laboratory. Retrieved 29 May 2018.
- ^ "Asteroid 136 Austria". Small Bodies Data Ferret. Retrieved 29 May 2018.
- ^ a b c d Schober, H. J. (January 1983), "Rotation periods and lightcurves of the asteroids 136 Austria and 238 Hypatia", Astronomy and Astrophysics, vol. 117, no. 2, pp. 362–364, Bibcode:1983A&A...117..362S.
- ^ Albrecht, R.; et al. (July 2001), "Early asteroid research in Austria", Planetary and Space Science, vol. 49, no. 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", Icarus, vol. 175, no. 1, pp. 141–158, Bibcode:2005Icar..175..141H, doi:10.1016/j.icarus.2004.10.017.
- ^ Behrend, Raoul, Courbes de rotation d'astéroïdes et de comètes (in French), Observatoire de Genève, retrieved 30 March 2013
External links
- 136 Austria at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- 136 Austria at the JPL Small-Body Database