Astronomy:674 Rachele
From HandWiki
| 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) |
| |{{{apsis}}}|helion}} | 3.4928 astronomical unit|AU (522.52 Gm) |
| |{{{apsis}}}|helion}} | 2.3488 AU (351.38 Gm) |
| 2.9208 AU (436.95 Gm) | |
| Eccentricity | 0.19584 |
| Orbital period | 4.99 yr (1823.3 d) |
| Mean anomaly | 147.48° |
| Mean motion | 0° 11m 50.82s / day |
| Inclination | 13.511° |
| Longitude of ascending node | 58.146° |
| 42.025° | |
| Physical characteristics | |
| Mean radius | 48.675±2.15 km |
| Rotation period | 30.982 h (1.2909 d) |
| Geometric albedo | 0.2007±0.019 |
| Absolute magnitude (H) | 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.[3] This is classified as an S-type asteroid,[4] 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.[5]
References
- ↑ "(DOP)". http://www.dizionario.rai.it/ricerca.aspx.
- ↑ "674 Rachele (1908 EP)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=674;cad=1.
- ↑ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 65, ISBN 978-3642297182, https://books.google.com/books?id=aeAg1X7afOoC&pg=PA65.
- ↑ 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, doi:10.1051/aas:1998393, Bibcode: 1998A&AS..128..525P.
- ↑ Marchis, F. et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus 185 (1): 39–63, doi:10.1016/j.icarus.2006.06.001, PMID 19081813, Bibcode: 2006Icar..185...39M.
External links
- 674 Rachele at AstDyS-2, Asteroids—Dynamic Site
- 674 Rachele at the JPL Small-Body Database
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