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, 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 ().
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° |
| 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 |
Leukothea is a C-type asteroid in the Tholen classification system, 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.
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.
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