299 Thora

Thora (minor planet designation: 299 Thora) is a 17 km Main belt asteroid with a potentially long 274-hour rotation period.[1] It was discovered by Johann Palisa on 6 October 1890 in Vienna.

299 Thora

Discovery
Discovered by	Johann Palisa
Discovery date	6 October 1890
Designations
MPC designation	(299) Thora
Named after	Thor
Minor planet category	Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	83.21 yr (30393 d)
Aphelion	2.58488 AU (386.693 Gm)
Perihelion	2.28265 AU (341.480 Gm)
Semi-major axis	2.43376 AU (364.085 Gm)
Eccentricity	0.062093
Orbital period	3.80 yr (1386.8 d)
Mean anomaly	40.9107°
Mean motion	0° 15^m 34.52^s / day
Inclination	1.60383°
Longitude of ascending node	241.531°
Argument of perihelion	150.672°
Physical characteristics
Dimensions	17.06±1.5 km[1]
Rotation period	274 h (11.4 d)[1]
Geometric albedo	0.1673±0.033[1]
Absolute magnitude (H)	11.3[1]

References

1. "JPL Small-Body Database Browser". JPL. Retrieved 11 May 2016.

External links

• 299 Thora at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 299 Thora at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters