30 Urania

30 Urania
	A three-dimensional model of 30 Urania based on its light curve.
Discovery[1]
Discovered by	J. R. Hind
Discovery date	July 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)
Aphelion	398.817 Gm (2.666 AU)
Perihelion	309.338 Gm (2.068 AU)
Semi-major axis	354.077 Gm (2.367 AU)
Eccentricity	0.126
Orbital period	1,330.017 d (3.64 a)
Mean anomaly	196.549°
Inclination	2.097°
Longitude of ascending node	307.820°
Argument of perihelion	86.560°
Physical characteristics
Dimensions	100.2±6.8 km (IRAS)[3]; 94.48±5.37 km[4]
Mass	(1.74±0.49)×1018 kg[4]
Mean density	3.92±1.29 g/cm3[4]
Rotation period	13.686 h (0.5703 d)[5]
Geometric albedo	0.1714[3]
Spectral type	S[3]
Apparent magnitude	9.36 (brightest)
Absolute magnitude (H)	7.53[3]

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.[6] 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.[7] 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.[8]

References

"Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
Noah Webster (1884) A Practical Dictionary of the English Language
Yeomans, Donald K., "30 Urania", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 9 April 2013.
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.
"EAR Derived Lightcurve Parameters, version 8", Planetary Data System Asteroid/Dust Archive, NASA, retrieved 9 April 2013.
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.
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.
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.

External links

Keck image of Urania (Marchis 2011 November 11)
30 Urania at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
30 Urania at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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[IAU_MPC-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

[JPL-3] Yeomans, Donald K., "30 Urania", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 9 April 2013.

[Carry2012-4] 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.

[EAR_lc-5] "EAR Derived Lightcurve Parameters, version 8", Planetary Data System Asteroid/Dust Archive, NASA, retrieved 9 April 2013.

[Gunther1855-6] 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.

[DeMeo2009-7] 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.

[Cellino2003-8] 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.