Discovery [1] | |
---|---|
Discovered by | J. Palisa |
Discovery site | Vienna Observatory |
Discovery date | 19 August 1882 |
Designations | |
(228) Agathe | |
Named after | daughter of astronomer Theodor v. Oppolzer [2] |
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) |
2.2013 AU (329.31 Gm) | |
Eccentricity | 0.24224 |
3.27 yr (1192.9 d) | |
359.08° | |
0° 18m 6.408s / day | |
Inclination | 2.5363° |
313.36° | |
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 |
6.484 h (0.2702 d) | |
0.2082±0.043 | |
B–V = 0.918 U–B = 0.596 S (Tholen), S (SMASS) | |
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]