211 Isolda

211 Isolda
Discovery
Discovered by Johann Palisa
Discovery date December 10, 1879
Designations
Named after
 Iseult
A912 AB, A912 BA,
1950 FM
Main belt
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion 528.554 Gm (3.533 AU)
Perihelion 380.83 Gm (2.546 AU)
454.692 Gm (3.039 AU)
Eccentricity 0.162
1935.434 d (5.3 a)
17.08 km/s
197.831°
Inclination 3.883°
263.771°
174.924°
Physical characteristics
Dimensions 149.81 ± 6.10[1] km
Mass (4.49 ± 2.43) × 1018[1] kg
Mean density
 2.54 ± 1.41[1] g/cm3
18.365 h
Albedo 0.0598 ± 0.0218[2]
Spectral type
 C[2] (Tholen)
7.90[2]

    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 Austrian astronomer Johann Palisa on December 10, 1879, in Pola, and named after Isolde, heroine of the legend of Tristan and Iseult.

    In 2001, the asteroid was detected by radar from the Arecibo Observatory at a distance of 1.78 AU. The resulting data yielded an effective diameter of 143 ± 16 km.[3]

    References

    1. ↑ 1.0 1.1 1.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    2. ↑ 2.0 2.1 2.2 Pravec, P. et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan (1667), Bibcode:2012LPICo1667.6089P. See Table 4.
    3. ↑ Magri, Christopher et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999 2003", Icarus 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018, retrieved 2015-04-14.

    External links