236 Honoria

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236 Honoria
Discovered byJohann Palisa
Discovery date26 April 1884
(236) Honoria
A904 PA, 1930 KK,
1953 GJ1
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc131.97 yr (48201 d)
Aphelion3.3307 AU (498.27 Gm)
Perihelion2.2651 AU (338.85 Gm)
2.79787 AU (418.555 Gm)
4.68 yr (1709.4 d)
17.8 km/s
0° 12m 38.16s / day
Physical characteristics
Dimensions86.20±3.7 km
12.336 h (0.5140 d)

Honoria (minor planet designation: 236 Honoria) is a large main belt asteroid that was discovered by Austrian astronomer Johann Palisa on 26 April 1884 in Vienna. The asteroid was named after Honoria, granddaughter of the Roman Emperor Theodosius I, who started negotiations with Attila the Hun. It is classified as a stony S-type asteroid based upon its spectrum. 236 Honoria is orbiting close to a 5:2 mean motion resonance with Jupiter, which is located at 2.824 AU.[3]

Polarimetric study of this asteroid reveals anomalous properties that suggests the regolith consists of a mixture of low and high albedo material. This may have been caused by fragmentation of an asteroid substrate with the spectral properties of CO3/CV3 carbonaceous chondrites.[4]


  1. ^ 'Honorius' in Noah Webster (1884) A Practical Dictionary of the English Language
  2. ^ Yeomans, Donald K., "236 Honoria", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
  3. ^ Hahn, G.; et al. (June 1991), "Orbital evolution studies of asteroids near the 5:2 mean motion resonance with Jupiter", Astronomy and Astrophysics, 246 (2): 603–618, Bibcode:1991A&A...246..603H.
  4. ^ Gil-Hutton, R.; et al. (April 2008), "New cases of unusual polarimetric behavior in asteroids", Astronomy and Astrophysics, 482 (1), pp. 309–314, Bibcode:2008A&A...482..309G, doi:10.1051/0004-6361:20078965.

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