218 Bianca
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Discovery
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| Discovered by | Johann Palisa |
| Discovery date | September 4, 1880 |
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Designations
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| Alternative names | n/a |
| Minor planet category |
Main belt |
| Epoch 30 January 2005 (JD 2453400.5) | |
| Aphelion | 445.878 Gm (2.981 AU) |
| Perihelion | 351.958 Gm (2.353 AU) |
| Semi-major axis | 398.918 Gm (2.667 AU) |
| Eccentricity | 0.118 |
| Orbital period | 1590.479 d (4.35 a) |
| Average orbital speed | 18.24 km/s |
| Mean anomaly | 301.767° |
| Inclination | 15.231° |
| Longitude of ascending node | 170.896° |
| Argument of perihelion | 60.97° |
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Physical characteristics
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| Dimensions | 61.0 km |
| Mass | unknown |
| Mean density | unknown |
| Equatorial surface gravity | unknown |
| Escape velocity | unknown |
| Rotation period | 6.337 h |
| Albedo | 0.174 |
| Temperature | unknown |
| Spectral type | S |
| Absolute magnitude | 8.6 |
218 Bianca is a sizeable Main belt asteroid. It is an S-type asteroid.
It was discovered by Johann Palisa on September 4, 1880 in Pola and was named after the then-famous Austro-Hungarian opera singer Bianca Bianchi (real name Bertha Schwarz). The Vienna newspapers contained several published accounts of the circumstances surrounding the honor extended to the diva in Spring 1882. [1]
In the late 1990s, a network of astronomers worldwide gathered lightcurve data that was ultimately used to derive the spin states and shape models of 10 new asteroids, including (218) Bianca. [2][3]
Bianca is also a moon of planet Uranus.
[edit] References
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
- ^ Schmadel Lutz D. Dictionary of Minor Planet Names (fifth edition), Springer, 2003. ISBN-10: 3540002383.
- ^ Durech., J.; Kaasalainen, M., Marciniak, A.; et al., “Physical models of ten asteroids from an observers' collaboration network,” Astronomy and Astrophysics , Volume 465, Issue 1, April I 2007, pp. 331-337
- ^ Durech, J.; Kaasalainen, M.; Marciniak, A.; Allen, W. H. et al. “Asteroid brightness and geometry,” Astronomy and Astrophysics, Volume 465, Issue 1, April I 2007, pp. 331-337.
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