442 Eichsfeldia

Eichsfeldia (minor planet designation: 442 Eichsfeldia) is a large main belt asteroid that was discovered by German astronomers Max Wolf and A. Schwassmann on 15 February 1899 in Heidelberg. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material.

442 Eichsfeldia
Discovery[1]
Discovered byM. Wolf
A. Schwassmann
Discovery siteHeidelberg Obs.
Discovery date15 February 1899
Designations
(442) Eichsfeldia
Pronunciation/ksˈfɛldiə/
Named after
Eichsfeld
1899 EE; A892 FA
main-belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc123.78 yr (45211 d)
Aphelion2.5112 AU (375.67 Gm)
Perihelion2.1796 AU (326.06 Gm)
2.3454 AU (350.87 Gm)
Eccentricity0.070707
3.59 yr (1312.0 d)
185.97°
 16m 27.84s / day
Inclination6.0689°
134.93°
85.047°
Earth MOID1.18144 AU (176.741 Gm)
Jupiter MOID2.47041 AU (369.568 Gm)
TJupiter3.550
Physical characteristics
Dimensions66.73±1.4 km[1]
65.58±1.70 km[2]
Mass1.95±0.20 × 1017 kg[2]
Mean density
1.32±0.16 g/cm3[2]
11.871 h (0.4946 d)
0.0386±0.002
BV = 0.692 mag
UB = 0.331 mag
tholen = C
SMASSII = Ch
10.03 mag
9.94 mag[3]

    Although Eichsfeldia has an orbit similar to the Vesta family asteroids, it was found to be an unrelated interloper on the basis of its non-matching spectral type.

    References

    1. "JPL Small-Body Database Browser: 442 Eichsfeldia (1899 EE)" (2015-09-27 last obs.). Jet Propulsion Laboratory. Retrieved 10 May 2016.
    2. 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.
    3. Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34, pp. 113–119, Bibcode:2007MPBu...34..113W.


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