30 Urania

Not to be confused with the Solar system planet Uranus.

30 Urania
Discovery[1]
Discovered byJ. R. Hind
Discovery dateJuly 22, 1854
Designations
(30) Urania
Pronunciation/jʊəˈreɪniə/ yoor-AY-nee-ə[2]
Named after
Urania
1948 JK
Main belt
Symbol (astrological)
Orbital characteristics[3]
Epoch June 14, 2006 (JD 2453900.5)
Aphelion398.817 Gm (2.666 AU)
Perihelion309.338 Gm (2.068 AU)
354.077 Gm (2.367 AU)
Eccentricity0.126
1,330.017 d (3.64 a)
196.549°
Inclination2.097°
307.820°
86.560°
Physical characteristics
Dimensionsc/a = 0.68±0.05[4]
88±2 km[4]
100.2±6.8 km (IRAS)[3]
94.48±5.37 km[5]
Mass(1.3±0.9)×1018 kg[4]
(1.74±0.49)×1018 kg[5]
Mean density
3.7±2.7 g/cm3[4]
3.92±1.29 g/cm3[5]
13.686 h (0.5703 d)[6]
0.214 (calculated)[4]
0.1714[3]
S[3]
9.36 (brightest)
7.53[3]

30 Urania is a large main-belt asteroid that was discovered by English astronomer John Russell Hind on July 22, 1854.[1] It was his last asteroid discovery. This object is named after Urania, the Greek Muse of astronomy. Initial orbital elements for 30 Urania were published by Wilhelm Günther, an assistant at Breslau Observatory.[7] It is orbiting the Sun with a period of 3.64 years and is spinning on its axis once every 13.7 hours.

Based upon its spectrum, this is classified as a stony S-type asteroid.[8] During 2000, speckle interferometry measurements from the Telescopio Nazionale Galileo in the Canary Islands were used to measure the apparent size and shape of 30 Urania. This gave cross-sectional dimensions equivalent to an ellipse with a length of 111 km and a width of 89 km, for a ratio of 0.80.[9]

  1. ^ a b Cite error: The named reference IAU_MPC was invoked but never defined (see the help page).
  2. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  3. ^ a b c d e Cite error: The named reference JPL was invoked but never defined (see the help page).
  4. ^ a b c d e P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
  5. ^ a b c Cite error: The named reference Carry2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference EAR_lc was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Gunther1855 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference DeMeo2009 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Cellino2003 was invoked but never defined (see the help page).