674 Rachele
674 Rachele is a minor planet orbiting the Sun. It was discovered by Wilhelm Lorenz on October 28, 1908 in Heidelberg, and was named by orbit computer Emilio Bianchi after his wife.[1] This is classified as an S-type asteroid,[2] 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.[3]
References
- ↑ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 65, ISBN 3642297188.
- ↑ Piironen, J.; et al. (March 1998), "Physical studies of asteroids. XXXII. Rotation periods and UBVRI-colours for selected asteroids", Astronomy and Astrophysics Supplement 128: 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), pp. 39–63, Bibcode:2006Icar..185...39M, doi:10.1016/j.icarus.2006.06.001, PMC 2600456, PMID 19081813, retrieved 2013-03-27.
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