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442 Eichsfeldia 
Summary
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.
| Discovery [1] | |
|---|---|
| Discovered by | M. Wolf A. Schwassmann |
| Discovery site | Heidelberg Obs. |
| Discovery date | 15 February 1899 |
| Designations | |
| (442) Eichsfeldia | |
| Pronunciation | /aɪksˈfɛldiə/ |
Named after | Eichsfeld |
| 1899 EE; A892 FA | |
| main-belt | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 123.78 yr (45211 d) |
| Aphelion | 2.5112 AU (375.67 Gm) |
| Perihelion | 2.1796 AU (326.06 Gm) |
| 2.3454 AU (350.87 Gm) | |
| Eccentricity | 0.070707 |
| 3.59 yr (1312.0 d) | |
| 185.97° | |
| 0° 16m 27.84s / day | |
| Inclination | 6.0689° |
| 134.93° | |
| 85.047° | |
| Earth MOID | 1.18144 AU (176.741 Gm) |
| Jupiter MOID | 2.47041 AU (369.568 Gm) |
| TJupiter | 3.550 |
| Physical characteristics | |
| Dimensions | 66.73±1.4 km[1] 65.58±1.70 km[2] |
| Mass | 1.95±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 edit
- ^ a b c "JPL Small-Body Database Browser: 442 Eichsfeldia (1899 EE)" (2015-09-27 last obs.). Jet Propulsion Laboratory. Retrieved 10 May 2016.
- ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- ^ Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, vol. 34, pp. 113–119, Bibcode:2007MPBu...34..113W.
External links edit
- Lightcurve plot of (442) Eichsfeldia, Antelope Hills Observatory
- 442 Eichsfeldia at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- 442 Eichsfeldia at the JPL Small-Body Database
