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 ew-NOH -mee-ə Named after
Eunomia Alternative names
none Minor planet category
Main belt, (Eunomia family) Orbital chairactereestics[ 1] Epoch June 14, 2006 (JD 2453900.5) Aphelion 3.138 AU (469.429 Gm) Perihelion 2.149 AU (321.429 Gm) 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[ 2] 268 km (mean) 330×245×205[ 3] [ 4] [ 5]
255.3 ± 15 km (IRAS)[ 1] Mass 3.12 × 1019 kg[ 2] 3.09 ± 0.52 g/cm³[ 2] 3.8±0.7 g/cm³[ 6] (based on IRAS diameter of 255km) Surface gravity
0.08 m/s² Escape velocity
0.16 km/s 0.2535 d (6.083 h)[ 1] [ 7] Albedo 0.209 (geometric)[ 1] Temperatur ~166 K max: 260 K (-13 °C) Spectral teep
S-type asteroid[ 1] Apparent magnitude
7.9[ 8] to 11.24 5.28[ 1] Angular diameter
0.29" tae 0.085"
15 Eunomia is a very lairge asteroid in the inner asteroid belt .
↑ 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 .
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