798 Ruth

798 Ruth
Discovery
Discovered by	Max Wolf
Discovery site	Heidelberg Observatory
Discovery date	21 November 1914
Designations
Pronunciation	/ˈruːθ/
Alternative designations	1914 VT
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	135.93 yr (49647 d)
Aphelion	3.1230 AU (467.19 Gm)
Perihelion	2.9062 AU (434.76 Gm)
Semi-major axis	3.0146 AU (450.98 Gm)
Eccentricity	0.035951
Orbital period (sidereal)	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°
Argument of perihelion	41.817°
Physical characteristics
Mean radius	21.595±1.45 km
Mass	(8.4±3.3)×1017 kg
Mean density	19.89 g/cm3
Synodic rotation period	8.550 h (0.3563 d)
Geometric albedo	0.1587±0.024
Spectral type	M
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. This main belt asteroid has an orbital period of 5.23 years and is orbiting at a distance of 3.0 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.

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. It is an M-type (metallic) asteroid that displays a significant component of the mineral olivine in its spectrum. 798 Ruth spans 43.19±2.9 km and rotates on its axis once every 8.55 h.

Notes

↑ Calculated from its standard gravitational parameter GM = 0.056±0.022 km³/s².
↑ Assuming a diameter of 43.2 km.

References

↑ Noah Webster (1884) A Practical Dictionary of the English Language
1 2 3 Yeomans, Donald K., "798 Ruth", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, archived from the original on 15 August 2014, retrieved 4 May 2016.
1 2 Fuentes-Muñoz, Oscar; Farnocchia, Davide; Giorgini, Jon D.; Park, Ryan S. (1 December 2025). "Asteroid Mass Estimation by Mutual Perturbations During Close Encounters After Gaia Focused Product Release". The Astronomical Journal. 170 (6): 353. Bibcode:2025AJ....170..353F. doi:10.3847/1538-3881/ae0cc9. ISSN 0004-6256. S2CID 283347135.
1 2 Sanchez, Juan A.; et al. (January 2014), "Olivine-dominated asteroids: Mineralogy and origin", Icarus, 228: 288–300, arXiv:1310.1080, Bibcode:2014Icar..228..288S, doi:10.1016/j.icarus.2013.10.006.
↑ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer Berlin Heidelberg, p. 73, ISBN 9783642297182.
↑ Veeder, G. J.; et al. (March 1995), "Eos, Koronis, and Maria family asteroids: Infrared (JHK) photometry" (PDF), Icarus, 114: 186–196, Bibcode:1995Icar..114..186V, doi:10.1006/icar.1995.1053.

External links

798 Ruth at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
798 Ruth at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

This article about an asteroid native to the asteroid belt is a stub. You can help Wikipedia by adding missing information.

[4] Calculated from its standard gravitational parameter GM = 0.056±0.022 km³/s².

[5] Assuming a diameter of 43.2 km.

[1] Noah Webster (1884) A Practical Dictionary of the English Language

[JPL-2] 1 2 3 Yeomans, Donald K., "798 Ruth", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, archived from the original on 15 August 2014, retrieved 4 May 2016.

[Fuentes-Muñoz2025-3] 1 2 Fuentes-Muñoz, Oscar; Farnocchia, Davide; Giorgini, Jon D.; Park, Ryan S. (1 December 2025). "Asteroid Mass Estimation by Mutual Perturbations During Close Encounters After Gaia Focused Product Release". The Astronomical Journal. 170 (6): 353. Bibcode:2025AJ....170..353F. doi:10.3847/1538-3881/ae0cc9. ISSN 0004-6256. S2CID 283347135.

[Sanchez_et_al_2014-6] 1 2 Sanchez, Juan A.; et al. (January 2014), "Olivine-dominated asteroids: Mineralogy and origin", Icarus, 228: 288–300, arXiv:1310.1080, Bibcode:2014Icar..228..288S, doi:10.1016/j.icarus.2013.10.006.

[Schmadel2012-7] Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, Springer Berlin Heidelberg, p. 73, ISBN 9783642297182.

[Veeder1995-8] Veeder, G. J.; et al. (March 1995), "Eos, Koronis, and Maria family asteroids: Infrared (JHK) photometry" (PDF), Icarus, 114: 186–196, Bibcode:1995Icar..114..186V, doi:10.1006/icar.1995.1053.