15 Eunomia

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15 Eunomia 15 Eunomia symbol.svg
15Eunomia (Lightcurve Inversion).png
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 /jʊˈnmiə/ ew-NOH-mee-ə
Named after
Eunomia
none
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
4.30 a (1569.687 d)
18.16 km/s
286.102°
Inclination 11.738°
293.273°
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]
Mean density
3.09 ± 0.52 g/cm³[2]
3.8±0.7 g/cm³[6]
(based on IRAS diameter of 255km)
0.08 m/s²
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]
7.9[8] to 11.24
5.28[1]
0.29" tae 0.085"

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

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 15 Eunomia". 2008-05-08 last obs. Retrieved 2008-12-04.  Check date values in: |date= (help)
  2. 2.0 2.1 2.2 Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Retrieved 2008-12-04. 
  3. 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. Retrieved 2008-11-11. 
  4. Nathues, A.; et al.; (2005); Spectral study of the Eunomia asteroid family - I. Eunomia, Icarus, Vol. 175, p. 452
  5. Tanga, P.; et al.; (2003); Asteroid observations with the Hubble Space Telescope; Astronomy & Astrophysics, Vol. 401, p. 733
  6. 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. 
  7. Planetary Data System (PDS) lightcurve data
  8. Donald H. Menzel and Jay M. Pasachoff (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 0-395-34835-8.