30 Urania

30 Urania
Discovery[1]
Discovered byJ. R. Hind
Discovery dateJuly 22, 1854
Designations
(30) Urania
Pronunciation/jʊəˈrniə/ yoor-AY-nee-ə[2]
Named after
Urania
1948 JK
Main belt
Symbol (astrological)
Orbital characteristics[3]
Epoch 17.0 October 2024 (JD 2460600.5)
Aphelion398.863 Gm (2.666 AU)
Perihelion309.039 Gm (2.066 AU)
353.951 Gm (2.366 AU)
Eccentricity0.127
1,329.308 d (3.64 a)
211.291°
Inclination2.093°
307.403°
87.100°
Earth MOID1.07287 AU
Jupiter MOID2.74597 AU
TJupiter3.536
Physical characteristics
Dimensions112 km × 84 km × 76 km5 km × 5 km × 4 km)[4]
88±2 km[4]
92.787±2.040 km (NEOWISE)[3]
94.48±5.37 km[5][a]
Flattening0.32 ± 0.05[b]
Mass(1.3±0.9)×1018 kg[4][a]
(1.74±0.49)×1018 kg[5][a]
Mean density
3.7±2.7 g/cm3[4]
3.92±1.29 g/cm3[5]
13.686 h (0.5703 d)[6][3]
72°[4]
19°±[4]
106°±[4]
0.214 (calculated)[4]
0.192 ± 0.027[3]
S[3][4][5]
9.36 (brightest)
7.59[3]
7.57[4]

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]

The astrological symbol for Urania is , compass calipers.[10]

Notes

  1. ^ a b c Composite estimate.
  2. ^ Flattening derived from the maximum aspect ratio (c/a): , where (c/a) = 0.68±0.05.[4]

References

  1. ^ a b "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, archived from the original on 22 February 2012, retrieved 7 April 2013.
  2. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  3. ^ a b c d e f Yeomans, Donald K., "30 Urania", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, archived from the original on 11 June 2011, retrieved 24 December 2024.
  4. ^ a b c d e f g h i j k 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 d 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, archived from the original on 13 September 2006, 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.
  10. ^ Miller, Kirk (18 October 2024). "Preliminary presentation of constellation symbols" (PDF). unicode.org. The Unicode Consortium. Archived (PDF) from the original on 2 November 2024. Retrieved 22 October 2024.

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