 Orbital diagram | |
| Discovery[1] | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 21 May 1879 |
| Designations | |
| (197) Arete | |
| Pronunciation | /əˈriːtiː/[2] |
Named after | Arete |
| A879 KA;1934 RE1; 1950 DY | |
| Asteroid belt | |
| Orbital characteristics[3][4] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 136.89 yr (50000 d) |
| Aphelion | 3.1882283 AU (476.95216 Gm) (Q) |
| Perihelion | 2.2897600 AU (342.54322 Gm) (q) |
| 2.7389941 AU (409.74769 Gm) (a) | |
| Eccentricity | 0.1640143 (e) |
| 4.53yr (1655.7d) | |
| 20.361539° (M) | |
| 0° 13m 2.744s / day (n) | |
| Inclination | 8.793773° (i) |
| 81.607160° (Ω) | |
| 246.46589° (ω) | |
| Earth MOID | 1.29448 AU (193.651 Gm) |
| Jupiter MOID | 2.16829 AU (324.372 Gm) |
| TJupiter | 3.314 |
| Physical characteristics[5] | |
| Dimensions | 29.18±2.4 km |
| 6.6084 h (0.27535 d)[3] 6.54 h[6] | |
| 0.4417±0.083[3] 0.442[7] | |
| S[8] | |
| 9.18[3] | |
197 Arete is anasteroid in theasteroid belt. It has a very bright surface, even so when compared to other rockyS-type asteroid.
It was discovered byJ. Palisa on May 21, 1879, and named afterArete, the mother ofNausicaa inHomer'sThe Odyssey.[9] Every 18 years, this asteroid approaches within 0.04 AU of4 Vesta. During these encounters, Vesta causes agravitational perturbation of Arete, allowing the mass of Vesta to be directly determined.[10]
Photometric observations during 1984 showed arotation period of 6.54 ± 0.02 hours and a brightness variation of 0.10 ± 0.01 inmagnitude. Thelight curve shows "four well definedextrema with two asymmetric maxima".[11]
_mathilde.jpg) | This article about an S-type asteroid native to theasteroid belt is astub. You can help Wikipedia byexpanding it. |
