218 Bianca

218 Bianca is a sizeable Main belt asteroid. It is an S-type asteroid. It was discovered by Johann Palisa on 4 September 1880, in Pola and was named after the 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.^[5] 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 ten new asteroids, including (218) Bianca. The shape model for this asteroid is asymmetrical.^[4][6]

DiscoveredbyJohann Palisa

Discoverydate4 September 1880

MPCdesignation

(218) Bianca

Pronunciation/biˈæŋkə/^[1]

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218 Bianca

A three-dimensional model of 218 Bianca based on its light curve.
Discovery
Discovered by	Johann Palisa
Discovery date	4 September 1880
Designations
MPC designation	(218) Bianca
Pronunciation	/biˈæŋkə/[1]
Named after	Bianca Bianchi
Alternative designations	A880 RA
Minor planet category	Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	122.41 yr (44709 d)
Aphelion	2.97915 AU (445.674 Gm)
Perihelion	2.35524 AU (352.339 Gm)
Semi-major axis	2.66719 AU (399.006 Gm)
Eccentricity	0.11696
Orbital period (sidereal)	4.36 yr (1591.0 d)
Average orbital speed	18.24 km/s
Mean anomaly	170.102°
Mean motion	0° 13m 34.565s / day
Inclination	15.2006°
Longitude of ascending node	170.635°
Argument of perihelion	63.0175°
Physical characteristics
Dimensions	60.62±1.4 km[2] 56.735 km[3]
Synodic rotation period	6.337 h (0.2640 d)[2] 6.33717 h[4]
Geometric albedo	0.1746±0.008[2] 0.1979 ± 0.0407[3]
Spectral type	S[3] (Tholen)
Absolute magnitude (H)	8.60,[2] 8.607[3]

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