35 Leukothea

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35 Leukothea
35Leukothea (Lightcurve Inversion).png
Three-dimensional model of 35 Leukothea created based on light-curve
Discovery
Discovered by R. Luther
Discovery dateApril 19, 1855
Designations
Designation
(35) Leukothea
Pronunciation /ljuːˈkɒθiə/ [1]
Named after
 Λευκοθέα Leykothea
1948 DC; 1950 RS1; 1976 WH
Main belt
Adjectives Leukothean /ljuːˈkɒθiən/
Symbol Leukothea symbol (bold).svg (historical)
Orbital characteristics [2]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 549.374 million km (3.672 AU)
Perihelion 345.074 million km (2.307 AU)
447.224 million km (2.990 AU)
Eccentricity 0.228
1,887.983 d (5.17  a)
Average orbital speed
17.00 km/s
77.469°
Inclination 7.938°
353.817°
213.962°
Physical characteristics
103.05 ± 1.2 km [3]
Mass (1.014 ± 0.491/0.321)×1018 kg [3]
Mean density
1.769 ± 0.857/0.56 g/cm3 [3]
~0.0513 km/s
31.900 [4] h
Albedo 0.066 [5]
Temperature ~162 K
Spectral type
 C
8.5

    35 Leukothea is a large, dark asteroid from the asteroid belt. It was discovered by German astronomer Karl Theodor Robert Luther on April 19, 1855, [6] and named after Leukothea, a sea goddess in Greek mythology. Its historical symbol was a pharos (ancient lighthouse); it was encoded in Unicode 17.0 as U+1CED0 𜻐 ( Leukothea symbol (fixed width).svg ). [7] [8]

    Leukothea is a C-type asteroid in the Tholen classification system, [2] suggesting a carbonaceous composition. It is orbiting the Sun with a period of 5.17 years and has a cross-sectional size of 103.1 km.

    Photometric observations of this asteroid from the Organ Mesa Observatory in Las Cruces, New Mexico during 2010 gave a light curve with a rotation period of 31.900±0.001 hours and a brightness variability of 0.42±0.04 in magnitude. This is consistent with previous studies in 1990 and 2008. [4]

    The computed Lyapunov time for this asteroid is 20,000 years, indicating that it occupies a chaotic orbit that will change randomly over time because of gravitational perturbations of the planets. [9]

    References

    1. ↑ "Leukothea". Dictionary.com Unabridged (Online). n.d.
    2. 1 2 Yeomans, Donald K., "35 Leukothea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory , retrieved 7 April 2013.
    3. 1 2 3 Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society. 492 (1). doi: 10.1093/mnras/stz3407 .
    4. 1 2 Pilcher, Frederick (July 2010), "Period Determinations for 11 Parthenope, 35 Leukothea, 38 Leda, 111 Ate, 194 Prokne, 262 Valda, 728 Leonisis, and 747 Winchester", The Minor Planet Bulletin, vol. 37, no. 3, pp. 119–122, Bibcode:2010MPBu...37..119P.
    5. ↑ Asteroid Data Archive, Planetary Science Institute, archived from the original on 23 May 2006, retrieved 3 November 2008.
    6. ↑ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
    7. ↑ Bala, Gavin Jared; Miller, Kirk (18 September 2023). "Unicode request for historical asteroid symbols" (PDF). unicode.org. Unicode. Retrieved 26 September 2023.
    8. ↑ "Miscellaneous Symbols Supplement" (PDF). unicode.org. The Unicode Consortium. 2025. Retrieved 9 September 2025.{{cite web}}: CS1 maint: url-status (link)
    9. ↑ Šidlichovský, M. (1999), Svoren, J.; Pittich, E. M.; Rickman, H. (eds.), "Resonances and chaos in the asteroid belt", Evolution and source regions of asteroids and comets : proceedings of the 173rd colloquium of the International Astronomical Union, held in Tatranska Lomnica, Slovak Republic, August 24–28, 1998, pp. 297–308, Bibcode:1999esra.conf..297S.
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