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35 Leukothea g
	Three-dimensional model of 35 Leukothea created based on light-curve
Discovery
Discovered by	R. Luther
Discovery date	April 19, 1855
Designations
Designation	(35) Leukothea
Pronunciation	/ljuːˈkɒθiə/
Named after	Λευκοθέα Leykothea
Alternative names	1948 DC; 1950 RS1; 1976 WH
Minor planet category	Main belt
Adjectives	Leukothean /ljuːˈkɒθiən/
Symbol	(historical)
Orbital characteristics
	Epoch December 31, 2006 (JD 2454100.5)
Aphelion	549.374 Gm (3.672 AU)
Perihelion	345.074 Gm (2.307 AU)
Semi-major axis	447.224 Gm (2.990 AU)
Eccentricity	0.228
Orbital period (sidereal)	1,887.983 d (5.17 a)
Average orbital speed	17.00 km/s
Mean anomaly	77.469°
Inclination	7.938°
Longitude of ascending node	353.817°
Argument of perihelion	213.962°
Physical characteristics
Mean diameter	103.05 ± 1.2 km
Mass	(1.014 ± 0.491/0.321)×1018 kg
Mean density	1.769 ± 0.857/0.56 g/cm3
Escape velocity	~0.0513 km/s
Synodic rotation period	31.900 h
Albedo	0.066
Temperature	~162 K
Spectral type	C
Absolute magnitude (H)	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 is in the pipeline for Unicode 17.0 as U+1CED0 𜻐 ().^[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

^ "Leukothea". Dictionary.com Unabridged (Online). n.d.
^ ^a ^b Yeomans, Donald K., "35 Leukothea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 7 April 2013.
^ ^a ^b ^c 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.
^ ^a ^b 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.
^ Asteroid Data Archive, Planetary Science Institute, archived from the original on 23 May 2006, retrieved 3 November 2008.
^ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
^ Bala, Gavin Jared; Miller, Kirk (18 September 2023). "Unicode request for historical asteroid symbols" (PDF). unicode.org. Unicode. Retrieved 26 September 2023.
^ Unicode. "Proposed New Characters: The Pipeline". unicode.org. The Unicode Consortium. Retrieved 6 November 2023.
^ 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.

External links

35 Leukothea at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
35 Leukothea at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[1] "Leukothea". Dictionary.com Unabridged (Online). n.d.

[jpl-2] Yeomans, Donald K., "35 Leukothea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 7 April 2013.

[FiengaEtAl2020-3] 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.

[Pilcher2010-4] 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.

[ADA-5] Asteroid Data Archive, Planetary Science Institute, archived from the original on 23 May 2006, retrieved 3 November 2008.

[IAU_MPC-6] "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.

[astunicode-7] Bala, Gavin Jared; Miller, Kirk (18 September 2023). "Unicode request for historical asteroid symbols" (PDF). unicode.org. Unicode. Retrieved 26 September 2023.

[pipeline-8] Unicode. "Proposed New Characters: The Pipeline". unicode.org. The Unicode Consortium. Retrieved 6 November 2023.

[Sidlichovsky-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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