Astronomy:798 Ruth
| Discovery | |
|---|---|
| Discovered by | Max Wolf |
| Discovery site | Heidelberg Observatory |
| Discovery date | 21 November 1914 |
| Designations | |
| (798) Ruth | |
| Pronunciation | /ˈruːθ/[1] |
| 1914 VT | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 135.93 yr (49647 d) |
| |{{{apsis}}}|helion}} | 3.1230 astronomical unit|AU (467.19 Gm) |
| |{{{apsis}}}|helion}} | 2.9062 AU (434.76 Gm) |
| 3.0146 AU (450.98 Gm) | |
| Eccentricity | 0.035951 |
| Orbital period | 5.23 yr (1,911.7 d) |
| Mean anomaly | 327.100° |
| Mean motion | 0° 11m 17.88s / day |
| Inclination | 9.2386° |
| Longitude of ascending node | 214.268° |
| 41.817° | |
| Physical characteristics | |
| Mean radius | 21.595±1.45 km |
| Rotation period | 8.550 h (0.3563 d) |
| Geometric albedo | 0.1587±0.024 |
| M[3] | |
| Absolute magnitude (H) | 9.5 |
798 Ruth is a minor planet orbiting the Sun that was discovered by the German astronomer Max Wolf on 21 November 1914. It may have been named after the biblical character Ruth.[4] This main belt asteroid has an orbital period of 5.23 years and is orbiting at a distance of 3.0 astronomical unit|AU from the Sun with an eccentricity (ovalness) of 0.036. The orbital plane is tilted by 9.2° from the plane of the ecliptic.[2]
This is a member of the dynamic Eos family of asteroids that most likely formed as the result of a collisional breakup of a parent body.[5] It is an M-type (metallic) asteroid that displays a significant component of the mineral olivine in its spectrum.[3] 798 Ruth spans 43.19±2.9 km and rotates on its axis once every 8.55 h.[2]
References
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 2.0 2.1 2.2 Yeomans, Donald K., "798 Ruth", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=798, retrieved 4 May 2016.
- ↑ 3.0 3.1 Sanchez, Juan A. et al. (January 2014), "Olivine-dominated asteroids: Mineralogy and origin", Icarus 228: 288–300, doi:10.1016/j.icarus.2013.10.006, Bibcode: 2014Icar..228..288S.
- ↑ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer Berlin Heidelberg, p. 73, ISBN 9783642297182, https://books.google.com/books?id=aeAg1X7afOoC&pg=PA73.
- ↑ Veeder, G. J. et al. (March 1995), "Eos, Koronis, and Maria family asteroids: Infrared (JHK) photometry", Icarus 114: 186–196, doi:10.1006/icar.1995.1053, Bibcode: 1995Icar..114..186V, https://trs.jpl.nasa.gov/bitstream/2014/29296/1/95-0212.pdf.
External links
- 798 Ruth at AstDyS-2, Asteroids—Dynamic Site
- 798 Ruth at the JPL Small-Body Database
 |  |
