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Discovery[1]
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| Discovered by | Johann Palisa |
| Discovery date | 1879-05-21 |
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Designations
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| Pronunciation | /əˈriːtiː/ |
| Named after | Arete |
| Alternate name(s) | 1934 RE1 1950 DY |
| Minor planet category |
Asteroid belt |
| Epoch August 27, 2011 | |
| Aphelion | 3.1790723 AU (Q) |
| Perihelion | 2.3005757 AU (q) |
| Semi-major axis | 2.7398240 AU (a) |
| Eccentricity | 0.1603199 |
| Orbital period | 4.54 yr (1656.4656 d) |
| Mean anomaly | 349.14185° (M) |
| Inclination | 8.79334° |
| Longitude of ascending node | 81.65294° (Ω) |
| Argument of perihelion | 246.54836° (ω) |
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Physical characteristics
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| Dimensions | 29.2 km |
| Rotation period | 6.54 h[4] |
| Albedo | 0.442[5] |
| Spectral type | S[6] |
| Absolute magnitude (H) | 9.18[2] |
197 Arete is an asteroid in the asteroid belt. It has a very bright surface, unusually bright even for a rocky S-type asteroid.
It was discovered by J. Palisa on May 21, 1879, and named after Arete, the mother of Nausicaa in Homer's The Odyssey.[7] Every 18 years, this asteroid approaches within 0.04 AU of 4 Vesta. During these encounters, Vesta causes a gravitational perturbation of Arete, allowing the mass of Vesta to be directly determined.[8]
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