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

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

References

• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• Asteroid Lightcurve Data File