Astronomy:442 Eichsfeldia
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Short description: Main-belt asteroid
| 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 | |
| Minor planet category | main-belt |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 123.78 yr (45211 d) |
| |{{{apsis}}}|helion}} | 2.5112 astronomical unit|AU (375.67 Gm) |
| |{{{apsis}}}|helion}} | 2.1796 AU (326.06 Gm) |
| 2.3454 AU (350.87 Gm) | |
| Eccentricity | 0.070707 |
| Orbital period | 3.59 yr (1312.0 d) |
| Mean anomaly | 185.97° |
| Mean motion | 0° 16m 27.84s / day |
| Inclination | 6.0689° |
| Longitude of ascending node | 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] |
| Rotation period | 11.871 h (0.4946 d) |
| Geometric albedo | 0.0386±0.002 |
| BV = 0.692 mag UB = 0.331 mag tholen = C SMASSII = Ch | |
| Absolute magnitude (H) | 10.03 mag 9.94 mag[3] |
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.
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
- ↑ 1.0 1.1 1.2 "JPL Small-Body Database Browser: 442 Eichsfeldia (1899 EE)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000442.
- ↑ 2.0 2.1 2.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ 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.
External links
- Lightcurve plot of (442) Eichsfeldia, Antelope Hills Observatory
- 442 Eichsfeldia at AstDyS-2, Asteroids—Dynamic Site
- 442 Eichsfeldia at the JPL Small-Body Database
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