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Urania (minor planet designation: 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.

Not to be confused with the Solar system planet Uranus.
30 Urania
Discovery[1]
Discovered byJ. R. Hind
Discovery dateJuly 22, 1854
Designations
MPC designation
(30) Urania
Pronunciation/jʊəˈreɪniə/ yoor-AY-nee-ə[2]
Named after
Urania
Alternative designations
1948 JK
Minor planet category
Main belt
Orbital characteristics[3]
Epoch June 14, 2006 (JD 2453900.5)
Aphelion398.817 Gm (2.666 AU)
Perihelion309.338 Gm (2.068 AU)
Semi-major axis
354.077 Gm (2.367 AU)
Eccentricity0.126
Orbital period (sidereal)
1,330.017 d (3.64 a)
Mean anomaly
196.549°
Inclination2.097°
Longitude of ascending node
307.820°
Argument of perihelion
86.560°
Physical characteristics
Dimensionsc/a = 0.68±0.05[4]
Mean diameter
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]
Synodic rotation period
13.686 h (0.5703 d)[6]
Geometric albedo
0.214 (calculated)[4]
0.1714[3]
Spectral type
S[3]
Apparent magnitude
9.36 (brightest)
Absolute magnitude (H)
7.53[3]

    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]


    References


    1. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
    2. Noah Webster (1884) A Practical Dictionary of the English Language
    3. Yeomans, Donald K., "30 Urania", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 9 April 2013.
    4. P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
    5. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    6. "EAR Derived Lightcurve Parameters, version 8", Planetary Data System Asteroid/Dust Archive, NASA, retrieved 9 April 2013.
    7. Gunther, W. (December 2012), "Elements and ephemeris of (30) Urania", Astronomical Journal, 4 (85): 103, Bibcode:1855AJ......4..103G, doi:10.1086/100505. See Table 1.
    8. DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.
    9. Cellino, A.; et al. (April 2003), "Speckle interferometry observations of asteroids at TNG", Icarus, 162 (2): 278–284, Bibcode:2003Icar..162..278C, CiteSeerX 10.1.1.532.4091, doi:10.1016/S0019-1035(03)00006-X.



    На других языках

    [de] (30) Urania

    (30) Urania ist ein Asteroid des Asteroiden-Hauptgürtels, der am 22. Juli 1854 von John R. Hind am George-Bishop-Observatorium entdeckt wurde.
    - [en] 30 Urania

    [es] (30) Urania

    (30) Urania es un asteroide perteneciente al cinturón de asteroides descubierto por John Russell Hind el 22 de julio de 1854 desde el observatorio George Bishop de Londres, Reino Unido. Está nombrado por Urania, una diosecilla de la mitología griega.[2]

    [ru] (30) Урания

    (30) Ура́ния (лат. Urania) — астероид главного пояса, который принадлежит к светлому спектральному классу S. Он был открыт 22 июля 1854 года английским астрономом Джоном Хиндом в обсерватории Бишопа, Великобритания и назван в честь Урании, древнегреческой музы астрономии[2]. Это последний астероид, открытый учёным.


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