Astronomy:30 Urania
 | |
| Discovery[1] | |
|---|---|
| Discovered by | J. R. Hind |
| Discovery date | July 22, 1854 |
| Designations | |
| (30) Urania | |
| Pronunciation | /jʊəˈreɪniə/ yoor-AY-nee-ə[2] |
| Named after | Urania |
| 1948 JK | |
| Minor planet category | Main belt |
| Orbital characteristics[3] | |
| Epoch June 14, 2006 (JD 2453900.5) | |
| |{{{apsis}}}|helion}} | 398.817 Gm (2.666 astronomical unit|AU) |
| |{{{apsis}}}|helion}} | 309.338 Gm (2.068 AU) |
| 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° |
| 86.560° | |
| Physical characteristics | |
| Dimensions | c/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] |
| Rotation period | 13.686 h (0.5703 d)[6] |
| Geometric albedo | 0.214 (calculated)[4] 0.1714[3] |
| S[3] | |
| Apparent magnitude | 9.36 (brightest) |
| Absolute magnitude (H) | 7.53[3] |
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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.
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
- ↑ 1.0 1.1 "Numbered Minor Planets 1–5000", Discovery Circumstances (IAU Minor Planet center), https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html, retrieved 2013-04-07.
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 3.0 3.1 3.2 3.3 3.4 Yeomans, Donald K., "30 Urania", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=30, retrieved 2013-04-09.
- ↑ 4.0 4.1 4.2 4.3 4.4 P. Vernazza et al. (2021) VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis. Astronomy & Astrophysics 54, A56
- ↑ 5.0 5.1 5.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73 (1): 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ "EAR Derived Lightcurve Parameters, version 8", Planetary Data System Asteroid/Dust Archive (NASA), http://www.psi.edu/pds/asteroid/EAR_A_5_DDR_DERIVED_LIGHTCURVE_V8_0/data/lc.tab, retrieved 2013-04-09.
- ↑ Gunther, W. (December 2012), "Elements and ephemeris of (30) Urania", Astronomical Journal 4 (85): 103, doi:10.1086/100505, Bibcode: 1855AJ......4..103G. See Table 1.
- ↑ DeMeo, Francesca E. et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared", Icarus 202 (1): 160–180, doi:10.1016/j.icarus.2009.02.005, Bibcode: 2009Icar..202..160D, http://www.tara.tcd.ie/bitstream/2262/43276/1/PEER_stage2_10.1016%252Fj.icarus.2009.02.005.pdf, retrieved 2013-04-08. See appendix A.
- ↑ Cellino, A. et al. (April 2003), "Speckle interferometry observations of asteroids at TNG", Icarus 162 (2): 278–284, doi:10.1016/S0019-1035(03)00006-X, Bibcode: 2003Icar..162..278C.
External links
- Keck image of Urania (Marchis 2011 November 11)
- 30 Urania at AstDyS-2, Asteroids—Dynamic Site
- 30 Urania at the JPL Small-Body Database
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