228 Agathe

228 Agathe
Discovery [1]
Discovered by	J. Palisa
Discovery site	Vienna Observatory
Discovery date	19 August 1882
Designations
MPC designation	(228) Agathe
Named after	daughter of astronomer; Theodor v. Oppolzer [2]
Minor planet category	main-belt
Orbital characteristics [1]
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	110.45 yr (40343 d)
Aphelion	2.7345 AU (409.08 Gm)
Perihelion	1.6680 AU (249.53 Gm)
Semi-major axis	2.2013 AU (329.31 Gm)
Eccentricity	0.24224
Orbital period	3.27 yr (1192.9 d)
Mean anomaly	359.08°
Mean motion	0° 18m 6.408s / day
Inclination	2.5363°
Longitude of ascending node	313.36°
Argument of perihelion	19.121°
Earth MOID	0.657123 AU (98.3042 Gm)
Mars MOID	0.2931 AU (43.85 Gm)
Jupiter MOID	2.62486 AU (392.673 Gm)
TJupiter	3.625
Physical characteristics
Dimensions	9.30±0.8 km
Rotation period	6.484 h (0.2702 d)
Geometric albedo	0.2082±0.043
Spectral type	B–V = 0.918; U–B = 0.596; S (Tholen), S (SMASS)
Absolute magnitude (H)	12.48

Agathe (minor planet designation: 228 Agathe) is a stony main belt asteroid, about 9 kilometers in diameter. It was discovered by Johann Palisa on 19 August 1882 at Vienna Observatory, Austria. Photometric observations during 2003 showed a rotation period of 6.48 ± 0.01 hours with a brightness variation of 0.27 ± 0.03 in magnitude. An earlier study yielded results that are consistent with these estimates.[3]

Agathe was named after the youngest daughter of Austrian astronomer Theodor von Oppolzer (1841–1886), professor of astronomy in Vienna.[2]

References

"JPL Small-Body Database Browser: 228 Agathe" (2015-06-18 last obs.). Jet Propulsion Laboratory. Retrieved 12 May 2016.
Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (228) Agathe. Springer Berlin Heidelberg. p. 35. doi:10.1007/978-3-540-29925-7_229. ISBN 978-3-540-29925-7.
Cooney, Walter R., Jr. (March 2005), "Lightcurve results for minor planets 228 Agathe, 297 Caecilia, 744 Aguntina 1062 Ljuba, 1605 Milankovitch, and 3125 Hay", The Minor Planet Bulletin, 32 (1): 15–16, Bibcode:2005MPBu...32...15C.

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