136 Austria

3D convex shape model of 136 Austria

Discovery[1]
Discovered by| Johann Palisa
Discovery site| Austrian Naval Obs.
Discovery date| 18 March 1874
Designations

MPC designation

| (136) Austria
Named after| Austria

Alternative designations

| A874 FA * 1950 HT[2][lower-alpha 1]
Minor planet category| 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)
|{{{apsis}}}|helion}}| 2.4812 AU
|{{{apsis}}}|helion}}| 2.0927 AU

Semi-major axis

| 2.2869 AU
Eccentricity| 0.0849
Orbital period| 3.46 yr (1,263 d)
Mean anomaly| 102.82°
Mean motion| 0° 17m 6s / day
Inclination| 9.5788°
Longitude of ascending node| 186.46°
|{{{apsis}}}|helion}}| 2024-Feb-24

|{{{apsis}}}|helion}}

| 132.95°
Physical characteristics
Mean diameter| 40.14±1.0 km[2]
40.14 km[4]
Mass| 6.8×1016 kg
Rotation period| 11.4969 h (0.47904 d)[2]
Geometric albedo| 0.1459±0.007[2]
0.1459[4]

Spectral type

| M[4]
Absolute magnitude (H)| 9.69

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. This object is orbiting the Sun at a distance of 2.29 astronomical unit|AU with an eccentricity of 0.08 and an orbital period of 3.46 years. The orbital plane is inclined at an angle of 9.6° to the plane of the ecliptic.

The cross-sectional diameter of this asteroid is 40.14 km. Based upon its spectrum, it is classified as a metallic M-type spectrum, although Clark et al. (1994) suggest it may be more like a stony 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.

## Notes

1. ↑ The MPC notates Austria's retroactive new-style designation as 1874 FA.[1]

## References

1. ↑ 1.0 1.1 1.2 "136 Austria". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=136. Retrieved 29 May 2018.
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "JPL Small-Body Database Browser: 136 Austria". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000136. Retrieved 29 May 2018.
3. ↑ "Asteroid 136 Austria". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=136+Austria. Retrieved 29 May 2018.
4. ↑ 4.0 4.1 4.2 4.3 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.
5. ↑ Albrecht, R. et al. (July 2001), "Early asteroid research in Austria", Planetary and Space Science 49 (8): pp. 777–779, doi:10.1016/S0032-0633(01)00027-7, Bibcode: 2001P&SS...49..777A.
6. ↑ 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.
7. ↑ 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, doi:10.1016/j.icarus.2004.10.017, Bibcode: 2005Icar..175..141H.
8. ↑ Behrend, Raoul (in French), Courbes de rotation d'astéroïdes et de comètes, Observatoire de Genève, http://obswww.unige.ch/~behrend/page_cou.html, retrieved 2013-03-30

## 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
* Close approach * Discovery * Ephemeris * Orbit diagram * Orbital elements * Physical parameters

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