15 أونوميا

15 Eunomia
الاكتشاف
اكتشفه	Annibale de Gasparis
تاريخ الاكتشاف	July 29، 1851
التسميات
الأسماء البديلة	none
تصنيف الكواكب الصغرى	Main belt، (Eunomia family)
السمات المدارية
	حقبة June 14، 2006 (JD 2453900.5)
Aphelion	469.429 Gm (3.138 AU)
Perihelion	321.429 Gm (2.149 AU)
Semi-major axis	395.429 Gm (2.643 AU)
Eccentricity	0.187
Orbital period	1569.687 d (4.30 a)
Average orbital speed	18.16 km/s
Mean anomaly	286.102°
Inclination	11.738°
Longitude of ascending node	293.273°
Argument of perihelion	97.909°
السمات الطبيعية
الأبعاد	357×255×212 km; 268 km (mean); 330×245×205 255.33 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)
Temperature	~166 K; max: 260 K (-13 °C)
Spectral type	S-type asteroid
Apparent magnitude	7.9 to 11.24
Absolute magnitude (H)	5.28
القطر الزاوي	0.29" to 0.085"

15 أونوميا 15 Eunomia يقع في حزام الكويكبات الواقع بين مداري المريخ والمشتري.

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اكتشافه

اكتشف سنة 1851م ويبلغ قطره نحو 260 كيلو مترا ومتوسط بعده عن الشمس نحو 2,64 وحدة فلكية.

الخصائص

أنظر ايضا

المصادر

مؤمن, عبد الأمير (2006). قاموس دار العلم الفلكي. بيروت، لبنان: دار العلم للملايين. {{cite book}}: Cite has empty unknown parameter: |طبعة أولى coauthors= (help)

^ ^أ ^ب ^ت ^ث ^ج ^ح "JPL Small-Body Database Browser: 15 Eunomia". 2008-05-08 last obs. Retrieved 2008-12-04. {{cite web}}: Check date values in: |date= (help)
^ ^أ ^ب ^ت Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Retrieved 2008-12-04.
^ Baer, James (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. doi:10.1007/s10569-007-9103-8. Retrieved 2008-11-11. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
^ Nathues, A.; et al.; (2005); Spectral study of the Eunomia asteroid family - I. Eunomia, 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 (2006). "New mass determination of (15) Eunomia based on a very close encounter with (50278) 2000CZ12". Astronomy and Astrophysics. 455 (3): L29–L31. doi:10.1051/0004-6361:20065760. Retrieved 2008-11-03. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
^ Planetary Data System (PDS) lightcurve data
^ Donald H. Menzel and Jay M. Pasachoff (1983). A Field Guide to the Stars and Planets (2nd edition ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 0395348358. {{cite book}}: |edition= has extra text (help)

وصلات خارجية

shape model deduced from lightcurve, including composition variations across the surface
Orbital simulation from JPL (Java) / Ephemeris

الكلمات الدالة:

حزام الكويكبات

[jpldata-1] أ ^ب ^ت ^ث ^ج ^ح "JPL Small-Body Database Browser: 15 Eunomia". 2008-05-08 last obs. Retrieved 2008-12-04. {{cite web}}: Check date values in: |date= (help)

[Baer-2] أ ^ب ^ت Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Retrieved 2008-12-04.

[Baer2007-3] Baer, James (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. doi:10.1007/s10569-007-9103-8. Retrieved 2008-11-11. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)

[Nathues05-4] Nathues, A.; et al.; (2005); Spectral study of the Eunomia asteroid family - I. Eunomia, Icarus, Vol. 175, p. 452

[Tanga03-5] Tanga, P.; et al.; (2003); Asteroid observations with the Hubble Space Telescope; Astronomy & Astrophysics, Vol. 401, p. 733

[VitaglianoStoss06-6] Vitagliano, Aldo (2006). "New mass determination of (15) Eunomia based on a very close encounter with (50278) 2000CZ12". Astronomy and Astrophysics. 455 (3): L29–L31. doi:10.1051/0004-6361:20065760. Retrieved 2008-11-03. {{cite journal}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)

[7] Planetary Data System (PDS) lightcurve data

[Pasachoff1983-8] Donald H. Menzel and Jay M. Pasachoff (1983). A Field Guide to the Stars and Planets (2nd edition ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 0395348358. {{cite book}}: |edition= has extra text (help)

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