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
- 1 2 "949 Hel (1921 JK)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016.
- 1 2 3 4 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
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