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 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc	109.66 yr (40,053 days)
Aphelion	2.7341 AU
Perihelion	1.6685 AU
Semi-major axis	2.2013 AU
Eccentricity	0.2420
Orbital period	3.27 yr (1192.9 days)
Mean anomaly	238.36°
Inclination	2.5365°
Longitude of ascending node	313.36°
Argument of perihelion	19.096°
Earth MOID	0.6582 AU
Physical characteristics
Dimensions	9.3 km
Rotation period	6.484 h
Geometric albedo	0.2082
Spectral type	B–V = 0.918 U–B = 0.596 S (Tholen), S (SMASS)
Absolute magnitude (H)	12.48

228 Agathe is a stony main belt asteroid, about 9 kilometers in diameter. It was discovered by Johann Palisa on August 19, 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

1. "JPL Small-Body Database Browser: 228 Agathe" (2015-06-18 last obs.). Jet Propulsion Laboratory. Retrieved October 2015.
2. Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (228) Agathe. Springer Berlin Heidelberg. p. 35. ISBN 978-3-540-29925-7. Retrieved October 2015.
3. 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.

External links

• Dictionary of Minor Planet Names, Google books
• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• 228 Agathe at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters