674 Rachele
Main-belt asteroid
From Wikipedia, the free encyclopedia
674 Rachele is a minor planet orbiting the Sun. It was discovered by Wilhelm Lorenz on 28 October 1908 in Heidelberg, and was named by orbit computer Emilio Bianchi after his wife.[4] This is classified as an S-type asteroid,[5] indicating a stony composition.
| Discovery | |
|---|---|
| Discovered by | Wilhelm Lorenz |
| Discovery site | Heidelberg |
| Discovery date | 28 October 1908 |
| Designations | |
| (674) Rachele | |
| Pronunciation | Italian: [raˈkɛːle][1] |
| 1908 EP | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 114.81 yr (41936 d) |
| Aphelion | 3.4928 AU (522.52 Gm) |
| Perihelion | 2.3488 AU (351.38 Gm) |
| 2.9208 AU (436.95 Gm) | |
| Eccentricity | 0.19584 |
| 4.99 yr (1823.3 d) | |
| 147.48° | |
| 0° 11m 50.82s / day | |
| Inclination | 13.511° |
| 58.146° | |
| 42.025° | |
| Physical characteristics | |
| 96.171±2.708 km[2][3] | |
| Mass | (1.452 ± 0.709/0.29)×1018 kg[3] |
Mean density | 3.117 ± 1.522/0.623 g/cm3[3] |
| 30.982 h (1.2909 d) | |
| 0.2007±0.019 | |
| 7.42 | |
Measurements made using the adaptive optics system at the W. M. Keck Observatory give a size estimate of 89 km. It has a size ratio of 1.08 between the major and minor axes. By comparison, measurements reported in 1998 from the IRAS observatory give a similar size of 97 km and a ratio of 1.15.[6]
_mathilde.jpg){kind=small}