Astronomy:808 Merxia
.png) Lightcurve-based 3D-model of Merxia | |
| Discovery | |
|---|---|
| Discovered by | Luigi Carnera |
| Discovery site | Heidelberg Observatory |
| Discovery date | 11 October 1901 |
| Designations | |
| (808) Merxia | |
| 1901 GY | |
| Minor planet category |
|
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 114.45 yr (41803 d) |
| |{{{apsis}}}|helion}} | 3.0921 astronomical unit|AU (462.57 Gm) |
| |{{{apsis}}}|helion}} | 2.3990 AU (358.89 Gm) |
| 2.7456 AU (410.74 Gm) | |
| Eccentricity | 0.12621 |
| Orbital period | 4.55 yr (1661.7 d) |
| Mean anomaly | 11.0596° |
| Mean motion | 0° 12m 59.94s / day |
| Inclination | 4.7240° |
| Longitude of ascending node | 181.066° |
| 274.396° | |
| Earth MOID | 1.41983 AU (212.404 Gm) |
| Jupiter MOID | 2.09197 AU (312.954 Gm) |
| TJupiter | 3.331 |
| Physical characteristics | |
| Mean radius | 16.245±1.15 km |
| Rotation period | 30.631 h (1.2763 d)[1] |
| Geometric albedo | 0.2207±0.035[1] |
| S-type asteroid[1] | |
| Absolute magnitude (H) | 9.8[1] |
808 Merxia is a minor planet orbiting the Sun. It forms the namesake for the Merxia family of asteroids that share common orbital elements and physical properties.
The spectrum of this object indicates that it is an S-type asteroid with both low and high calcium forms of pyroxene on the surface, along with less than 20% olivine. The high-calcium form of pyroxene forms 40% or more of the total pyroxene present, indicating a history of igneous rock deposits. This suggests that the asteroid underwent differentiation by melting, creating a surface of basalt rock.[2]
808 Merxia is the namesake of the Merxia family of asteroids that share similar orbital elements and physical properties. The members of this family, including 808 Merxia, most likely formed from the breakup of a basalt object, which in turn was spawned from a larger parent body that had previously undergone igneous differentiation. Other members of this family include 1662 Hoffmann and 2042 Sitarski.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 808 Merxia". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=808.
- ↑ 2.0 2.1 Sunshine, Jessica M. et al. (August 2004), "High-calcium pyroxene as an indicator of igneous differentiation in asteroids and meteorites", Meteoritics & Planetary Science 39 (8): 1343–1357, doi:10.1111/j.1945-5100.2004.tb00950.x, Bibcode: 2004M&PS...39.1343S.
External links
- Lightcurve plot of (808) Merxia, Antelope Hills Observatory
- 808 Merxia at AstDyS-2, Asteroids—Dynamic Site
- 808 Merxia at the JPL Small-Body Database
 |  |
