211 Isolda

Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0 | name=211 Isolda
discoverer=Johann Palisa
discovered=December 10, 1879
alt_names=A912 AB, A912 BA,
1950 FM
mp_category=Main belt
epoch=30 January, 2005 (JD 2453400.5)
semimajor=454.692 Gm (3.039 AU)
perihelion=380.83 Gm (2.546 AU)
aphelion=528.554 Gm (3.533 AU)
eccentricity=0.162
period=1935.434 d (5.3 a)
inclination=3.883°
asc_node=263.771°
arg_peri=174.924°
mean_anomaly=197.831°
avg_speed=17.08 km/s
dimensions=143.0 km
mass="unknown"
density="unknown"
surface_grav="unknown"
escape_velocity="unknown"
rotation=18.365 h
spectral_type=C
abs_magnitude=7.89
albedo=0.060
single_temperature="unknown"

211 Isolda is a very large, dark Main belt asteroid. It is classified as a C-type asteroid and is probably composed of primitive carbonaceous material.

It was discovered by Johann Palisa on December 10, 1879 in Pola and named after Isolde, heroine of the legend of Tristan and Iseult.

References

* [ftp://ftp.lowell.edu/pub/elgb/astorb.html The Asteroid Orbital Elements Database]
* [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html Minor Planet Discovery Circumstances]
* [http://spiff.rit.edu/richmond/parallax/phot/LCSUMPUB.TXT Asteroid Lightcurve Data File]