218 Bianca

{{Short description|Main-belt asteroid}}

{{For|the satellite of Uranus|Bianca (moon)}}

{{Use dmy dates|date=July 2020}}

{{Infobox planet

| minorplanet=yes

| mpc_name=(218) Bianca

| background=#D6D6D6

| name=218 Bianca

| pronounced = {{IPAc-en|b|i|ˈ|æ|ŋ|k|ə}}Benjamin Smith (1903) The Century Dictionary and Cyclopedia

| alt_names= A880 RA

|named_after=Bianca Bianchi

| image=218Bianca (Lightcurve Inversion).png

| image_scale =

| caption=A three-dimensional model of 218 Bianca based on its light curve.

| discoverer=Johann Palisa

| discovered=4 September 1880

| mp_category=Main belt

| epoch=31 July 2016 (JD 2457600.5)

| semimajor={{Convert|2.66719|AU|Gm|abbr=on}}

| perihelion={{Convert|2.35524|AU|Gm|abbr=on}}

| aphelion={{Convert|2.97915|AU|Gm|abbr=on|lk=on}}

| eccentricity=0.11696

| period=4.36 yr (1591.0 d)

| inclination=15.2006°

| asc_node=170.635°

| arg_peri=63.0175°

| mean_anomaly=170.102°

| avg_speed=18.24 km/s

| dimensions={{val|60.62|1.4|ul=km}}
56.735 km

| mass=

| density=

| rotation={{Convert|6.337|h|d|abbr=on|lk=on}}
6.33717 h

| spectral_type=S (Tholen)

| abs_magnitude=8.60, 8.607

| albedo={{val|0.1746|0.008}}
0.1979 ± 0.0407

| single_temperature=

| mean_motion={{Deg2DMS|0.226268|sup=ms}} / day

| orbit_ref={{Cite web |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=218;cad=1 |title=218 Bianca |work=JPL Small-Body Database |publisher=NASA/Jet Propulsion Laboratory |access-date=12 May 2016}}

| observation_arc=122.41 yr (44709 d)

| uncertainty=0

}}

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.{{cite book|last=Schmadel|first=Lutz D.|title=Dictionary of minor planet names|publisher=Springer|date=2003|edition=5th|pages=34–35|isbn=978-3-540-00238-3|url=https://books.google.com/books?id=KWrB1jPCa8AC&pg=PA35}} 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.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.