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Isolda (minor planet designation: 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. The spectra of the asteroid displays evidence of aqueous alteration.[6]

211 Isolda
Discovery
Discovered byJohann Palisa
Discovery date10 December 1879
Designations
MPC designation
(211) Isolda
Pronunciation/ɪˈzoʊldə/[1]
Named after
Iseult
Alternative designations
A879 XA, 1912 AB
1912 BA, 1950 FM
Minor planet category
Main belt
AdjectivesIsoldian /ɪˈzoʊldiən/[2]
Orbital characteristics[3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc136.19 yr (49742 d)
Aphelion3.53270 AU (528.484 Gm)
Perihelion2.5514 AU (381.68 Gm)
Semi-major axis
3.04205 AU (455.084 Gm)
Eccentricity0.16129
Orbital period (sidereal)
5.31 yr (1938.0 d)
Average orbital speed
17.08 km/s
Mean anomaly
260.142°
Mean motion
0° 11m 8.74s / day
Inclination3.8856°
Longitude of ascending node
263.644°
Argument of perihelion
173.522°
Physical characteristics
Dimensions143.19±5.1 km[3]
149.81 ± 6.10 km[4]
Mass(4.49 ± 2.43) × 1018 kg[4]
Mean density
2.54 ± 1.41 g/cm3[4]
Synodic rotation period
18.365 h (0.7652 d)
Geometric albedo
0.0602±0.004[3]
0.0598 ± 0.0218[5]
Spectral type
C[5] (Tholen)
Absolute magnitude (H)
7.89,[3] 7.90[5]

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

    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.[7]

    Between 2009 and 2022, 211 Isolda has been observed to occult seven stars.[citation needed]


    References


    1. "Isolde". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 1 March 2020.
    2. Irene Masing-Delic (1992) Abolishing Death: A Salvation Myth of Russian Twentieth-Century Literature, p. 163
    3. "211 Isolda". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
    4. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    5. 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, vol. 1667, no. 1667, p. 6089, Bibcode:2012LPICo1667.6089P. See Table 4.
    6. Fornasier, S.; et al. (February 1999), "Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites", Astronomy and Astrophysics Supplement, 135: 65−73, Bibcode:1999A&AS..135...65F, doi:10.1051/aas:1999161.
    7. Magri, Christopher; et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999 2003" (PDF), Icarus, 186 (1): 126–151, Bibcode:2007Icar..186..126M, doi:10.1016/j.icarus.2006.08.018, retrieved 14 April 2015.



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    На других языках

    [de] (211) Isolda

    (211) Isolda ist ein Asteroid des Asteroiden-Hauptgürtels, der am 10. Dezember 1879 von Johann Palisa entdeckt wurde. Der Asteroid wurde nach der legendären Figur aus Tristan und Isolde benannt.
    - [en] 211 Isolda

    [es] (211) Isolda

    (211) Isolda es un asteroide perteneciente al cinturón de asteroides descubierto el 10 de diciembre de 1879 por Johann Palisa desde el observatorio de Pula, Croacia.[2] Está posiblemente nombrado por Isolda, un personaje de las leyendas artúricas.[3]

    [ru] (211) Изольда

    (211) Изольда (лат. Isolda) — крупный астероид главного пояса, принадлежащий к астероидам спектрального класса C, породы которых имеют повышенное содержание углерода. Поэтому Изольда имеет очень маленькое альбедо — она отражает лишь 6 % падающего на него света.


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