299 Thora Explained

Minorplanet:yes
Background:
  1. D6D6D6
299 Thora
Discovered:6 October 1890
Mpc Name:(299) Thora
Alt Names:A890 TA, 1935 PC
1939 PK
Epoch:31 July 2016 (JD 2457600.5)
Semimajor:2.43376AU
Perihelion:2.28265AU
Aphelion:2.58488AU
Eccentricity:0.062093
Period:1386.8days
Inclination:1.60383°
Asc Node:241.531°
Arg Peri:150.672°
Rotation:274abbr=onNaNabbr=on
Abs Magnitude:11.3
Mean Motion: / day
Observation Arc:83.21 yr (30393 d)
Uncertainty:0

299 Thora is a 17 km Main belt asteroid with a potentially long 274-hour rotation period. It was discovered by Johann Palisa on 6 October 1890 in Vienna.

This object has a very low rate of spin, requiring 272.9± to complete a full rotation.