895 Helio

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.

895 Helio
Discovery
Discovered byMax Wolf
Discovery siteHeidelberg
Discovery date11 July 1918
Designations
(895) Helio
Pronunciation/ˈhiːlioʊ/[1]
1918 DU
AdjectivesHelian /ˈhiːliən/
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc109.79 yr (40100 days)
Aphelion3.6686 AU (548.81 Gm)
Perihelion2.7362 AU (409.33 Gm)
3.2024 AU (479.07 Gm)
Eccentricity0.14558
5.73 yr (2093.2 d)
241.229°
0° 10m 19.164s / day
Inclination26.077°
264.704°
178.108°
Earth MOID1.75069 AU (261.899 Gm)
Jupiter MOID1.60187 AU (239.636 Gm)
TJupiter3.019
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)
9.3959 h[2]
0.0420±0.002[2]
FCB/B[2]
8.3[2]

    References
    1. "helio". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
    2. "JPL Small-Body Database Browser: 895 Helio". Jet Propulsion Laboratory. Retrieved 3 May 2016.
    3. 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.


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