299 Thora

Last updated
299 Thora
Discovery
Discovered by Johann Palisa
Discovery date6 October 1890
Designations
(299) Thora
Named after
Thor
Main belt
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 83.21 yr (30393 d)
Aphelion 2.58  AU (386.69  Gm)
Perihelion 2.28 AU (341.48 Gm)
2.43 AU (364.09 Gm)
Eccentricity 0.062093
3.80 yr (1,386.8 d)
40.9107°
0° 15m 34.52s / day
Inclination 1.60383°
241.531°
150.672°
Physical characteristics
Dimensions17.06±1.5  km [1]
274  h (11.4  d) [1]
0.1673±0.033 [1]
11.3 [1]

    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.

    This object has a very low rate of spin, requiring 11.37 ± 0.04 days (272.9 ± 0.9 h) to complete a full rotation. [2]

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    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser". JPL. Retrieved 11 May 2016.
    2. Pilcher, Frederick; et al. (July 2017). "299 Thora and 496 Gryphia: Two More Very Slowly Rotating Asteroids". Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers. 44 (3): 270–274. Bibcode:2017MPBu...44..270P.