236 Honoria

236 Honoria
Discovery
Discovered by	Johann Palisa
Discovery date	26 April 1884
Designations
MPC designation	(236) Honoria
Pronunciation	/hɒˈnɔːriə/
Alternative designations	A904 PA, 1930 KK,; 1953 GJ1
Minor planet category	Main belt
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	131.97 yr (48201 d)
Aphelion	3.3307 AU (498.27 Gm)
Perihelion	2.2651 AU (338.85 Gm)
Semi-major axis	2.79787 AU (418.555 Gm)
Eccentricity	0.19042
Orbital period (sidereal)	4.68 yr (1709.4 d)
Average orbital speed	17.8 km/s
Mean anomaly	294.554°
Mean motion	0° 12m 38.16s / day
Inclination	7.6942°
Longitude of ascending node	185.861°
Argument of perihelion	174.872°
Physical characteristics
Dimensions	86.20±3.7 km
Synodic rotation period	12.336 h (0.5140 d)
Geometric albedo	0.1271±0.012
Spectral type	S
Absolute magnitude (H)	8.18

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]

References[]

^ 'Honorius' in Noah Webster (1884) A Practical Dictionary of the English Language
^ Yeomans, Donald K., "236 Honoria", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
^ 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.
^ Gil-Hutton, R.; et al. (April 2008), "New cases of unusual polarimetric behavior in asteroids", Astronomy and Astrophysics, vol. 482, no. 1, pp. 309–314, Bibcode:2008A&A...482..309G, doi:10.1051/0004-6361:20078965.

External links[]

The Asteroid Orbital Elements Database
Minor Planet Discovery Circumstances
Asteroid Lightcurve Data File
236 Honoria at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
236 Honoria at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[1] 'Honorius' in Noah Webster (1884) A Practical Dictionary of the English Language

[JPL-2] Yeomans, Donald K., "236 Honoria", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.

[Hahn_et_al_1991-3] 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.

[GilHutton2008-4] Gil-Hutton, R.; et al. (April 2008), "New cases of unusual polarimetric behavior in asteroids", Astronomy and Astrophysics, vol. 482, no. 1, pp. 309–314, Bibcode:2008A&A...482..309G, doi:10.1051/0004-6361:20078965.

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