| 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 | |
Mean diameter | 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 | |
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.
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]
References
- ^ "(DOP)". Archived from the original on 21 June 2013. Retrieved 18 March 2020.
- ^ a b "674 Rachele (1908 EP)". JPL Small-Body Database. NASA/ Jet Propulsion Laboratory. Retrieved 7 May 2016.
- ^ 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.
- ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 65, ISBN 978-3642297182.
- ^ Piironen, J.; et al. (March 1998), "Physical studies of asteroids. XXXII. Rotation periods and UBVRI-colours for selected asteroids", Astronomy and Astrophysics Supplement, 128 (3): 525–540, Bibcode: 1998A&AS..128..525P, doi: 10.1051/aas:1998393.
- ^ Marchis, F.; et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus, 185 (1): 39–63, Bibcode: 2006Icar..185...39M, doi: 10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813.
External links
- 674 Rachele at AstDyS-2, Asteroids—Dynamic Site
- 674 Rachele at the JPL Small-Body Database
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