| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery site | Heidelberg |
| Discovery date | 11 July 1918 |
| Designations | |
MPC designation | (895) Helio |
| Pronunciation | /ˈhiːlioʊ/[1] |
| 1918 DU | |
| Adjectives | Helian /ˈhiːliən/ |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 109.79 yr (40100 days) |
| Aphelion | 3.6686 AU (548.81 Gm) |
| Perihelion | 2.7362 AU (409.33 Gm) |
Semi-major axis | 3.2024 AU (479.07 Gm) |
| Eccentricity | 0.14558 |
| 5.73 yr (2093.2 d) | |
| 241.229° | |
| 0° 10m 19.164s / day | |
| Inclination | 26.077° |
| 264.704° | |
| 178.108° | |
| Earth MOID | 1.75069 AU (261.899 Gm) |
| Jupiter MOID | 1.60187 AU (239.636 Gm) |
| TJupiter | 3.019 |
| Physical characteristics | |
Mean diameter | 148.43 ± 5.02 km[3] 109.568±1.987 km[2] |
| Mass | (9.87 ± 6.05) × 1018 kg[3] |
Mean density | 5.76 ± 3.58 g/cm3[3] |
| 9.3959 h (0.39150 d) | |
Sidereal rotation period | 9.3959 h[2] |
| 0.0420±0.002[2] | |
| FCB/B[2] | |
| 8.3[2] | |
895 Helio is a large dark outer main-belt asteroid[2] about 150 km in diameter. It was discovered on 11 July 1918 by Max Wolf.[2] It is a B-type asteroid.[2] It is named after the element helium, whose spectrum was studied by Friedrich Paschen and Carl David Tolmé Runge, with the asteroid being named by Paschen at Wolf's request; the name helium itself comes from Helios, the Greek god of the Sun.
References
- ^ "helio". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ a b c d e f g h i "JPL Small-Body Database Browser: 895 Helio". Jet Propulsion Laboratory. Retrieved 3 May 2016.
- ^ a b c 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
