949 Hel

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949 Hel
Discovery
Discovered by Max Wolf
Discovery site Heidelberg
Discovery date 11 March 1921
Designations
1921 JK
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 87.59 yr (31993 days)
Aphelion 3.5827 AU (535.96 Gm)
Perihelion 2.4254 AU (362.83 Gm)
3.0040 AU (449.39 Gm)
Eccentricity 0.19261
5.21 yr (1901.8 d)
93.607°
0° 11m 21.48s / day
Inclination 10.701°
321.207°
249.214°
Earth MOID 1.44591 AU (216.305 Gm)
Jupiter MOID 1.58039 AU (236.423 Gm)
Jupiter Tisserand parameter 3.197
Physical characteristics
Mean radius
34.585±0.7 km,[1] 31.78 ± 2.005 km[2]
Mass (1.73 ± 0.62) × 1018 kg[2]
Mean density
12.86 ± 5.19[2] g/cm3
10.85 h (0.452 d)
0.0487±0.002
Xk[2]
9.8

949 Hel is a minor planet orbiting the Sun.

References[edit]

  1. ^ a b "949 Hel (1921 JK)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016. 
  2. ^ a b c d Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.

External links[edit]