674 Rachele

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674 Rachele
Discovery
Discovered by Wilhelm Lorenz
Discovery site Heidelberg
Discovery date 28 October 1908
Designations
1908 EP
Orbital characteristics[1]
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°
Earth MOID 1.38195 AU (206.737 Gm)
Jupiter MOID 1.84684 AU (276.283 Gm)
Jupiter Tisserand parameter 3.210
Physical characteristics
Mean radius
48.675±2.15 km
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 October 28, 1908 in Heidelberg, and was named by orbit computer Emilio Bianchi after his wife.[2] This is classified as an S-type asteroid,[3] 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.[4]

References[edit]

  1. ^ "674 Rachele (1908 EP)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 7 May 2016. 
  2. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 65, ISBN 3642297188. 
  3. ^ 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. 
  4. ^ 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 2600456free to read, PMID 19081813, retrieved 2013-03-27. 

External links[edit]