15 Eunomia

15 Eunomia
	A three-dimensional model of 15 Eunomia based on its licht curve.
Discovery
Discovered bi	Annibale de Gasparis
Discovery date	Julie 29, 1851
Designations
Pronunciation	/jʊˈnoʊmiə/ ew-NOH-mee-ə
Named after	Eunomia
Alternative names	none
Minor planet category	Main belt, (Eunomia family)
Orbital chairactereestics
	Epoch June 14, 2006 (JD 2453900.5)
Aphelion	3.138 AU (469.429 Gm)
Perihelion	2.149 AU (321.429 Gm)
Semi-major axis	2.643 AU (395.429 Gm)
Eccentricity	0.187
Orbital period	4.30 a (1569.687 d)
Average orbital speed	18.16 km/s
Mean anomaly	286.102°
Inclination	11.738°
Longitude o ascendin node	293.273°
Argument o perihelion	97.909°
Pheesical chairacteristics
Dimensions	(357×255×212)±15 km; 268 km (mean); 330×245×205 255.3 ± 15 km (IRAS)
Mass	3.12 ×1019 kg
Mean density	3.09 ± 0.52 g/cm³; 3.8±0.7 g/cm³; (based on IRAS diameter of 255km)
Surface gravity	0.08 m/s²
Escape velocity	0.16 km/s
Rotation period	0.2535 d (6.083 h)
Albedo	0.209 (geometric)
Temperatur	~166 K; max: 260 K (-13 °C)
Spectral teep	S-type asteroid
Apparent magnitude	7.9 to 11.24
Absolute magnitude (H)	5.28
Angular diameter	0.29" tae 0.085"

15 Eunomia is a very lairge asteroid in the inner asteroid belt.

References

↑ ^a ^b ^c ^d ^e ^f "JPL Small-Body Database Browser: 15 Eunomia". 8 Mey 2008. Retrieved 4 December 2008.
↑ ^a ^b ^c Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Archived frae the original on 21 October 2013. Retrieved 4 December 2008.
↑ Baer, James; Steven R. Chesley (2008). "Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris" (PDF). Celestial Mechanics and Dynamical Astronomy. Springer Science+Business Media B.V. 2007. 100 (2008): 27–42. Bibcode:2008CeMDA.100...27B. doi:10.1007/s10569-007-9103-8. Archived frae the original (PDF) on 24 Februar 2011. Retrieved 11 November 2008.
↑ Nathues, A.; et al.; (2005); Spectral study of the Eunomia asteroid family - I. Eunomia Archived 2015-11-05 at the Wayback Machine, Icarus, Vol. 175, p. 452
↑ Tanga, P.; et al.; (2003); Asteroid observations with the Hubble Space Telescope; Astronomy & Astrophysics, Vol. 401, p. 733
↑ Vitagliano, Aldo; Reiner M. Stoss (2006). "New mass determination of (15) Eunomia based on a very close encounter with (50278) 2000CZ12". Astronomy and Astrophysics. 455 (3): L29–L31. Bibcode:2006A&A...455L..29V. doi:10.1051/0004-6361:20065760.
↑ "Planetary Data System (PDS) lightcurve data". Archived frae the original on 14 Juin 2006. Retrieved 7 November 2014.
↑ Donald H. Menzel and Jay M. Pasachoff (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. pp. 391. ISBN 0-395-34835-8.