136 Austria

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136 Austria
Discovery
Discovered by Johann Palisa
Discovery date 18 March 1874
Designations
MPC designation (136) Austria
Named after
Austria
Main belt
Orbital characteristics[1]
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)
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[1]
40.14 km[2]
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)[1]
0.1459±0.007[1]
0.1459[2]
Temperature ~184 K
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[edit]

  1. ^ a b c d Yeomans, Donald K., "136 Austria", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016. 
  2. ^ a b c d 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. 
  3. ^ 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. 
  4. ^ 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. 
  5. ^ 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), pp. 141–158, Bibcode:2005Icar..175..141H, doi:10.1016/j.icarus.2004.10.017. 
  6. ^ Behrend, Raoul, Courbes de rotation d'astéroïdes et de comètes (in French), Observatoire de Genève, retrieved 2013-03-30 

External links[edit]