Discovered by Johann Palisa Minor planet category Main belt Discovered 6 October 1890 Discoverer Johann Palisa Discovery site Vienna Observatory | Discovery date 6 October 1890 Observation arc 83.21 yr (30393 d) Orbits Sun Named after Thor Asteroid group Asteroid belt | |
Aphelion 2.58488 AU (386.693 Gm) Perihelion 2.28265 AU (341.480 Gm) Similar 242 Kriemhild, 220 Stephania, 276 Adelheid, 178 Belisana, 265 Anna | ||
299 Thora is a 17 km Main belt asteroid with a potentially long 274-hour rotation period. It was discovered by Johann Palisa on October 6, 1890 in Vienna.
References
299 Thora Wikipedia(Text) CC BY-SA