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674 Rachele

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674 Rachele
Discovery
Discovered byWilhelm Lorenz
Discovery siteHeidelberg
Discovery date28 October 1908
Designations
(674) Rachele
PronunciationItalian: [raˈkɛːle][1]
1908 EP
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc114.81 yr (41936 d)
Aphelion3.4928 AU (522.52 Gm)
Perihelion2.3488 AU (351.38 Gm)
2.9208 AU (436.95 Gm)
Eccentricity0.19584
4.99 yr (1823.3 d)
147.48°
0° 11m 50.82s / day
Inclination13.511°
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

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

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  1. ^ "(DOP)". Archived from the original on 21 June 2013. Retrieved 18 March 2020.
  2. ^ a b "674 Rachele (1908 EP)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 7 May 2016.
  3. ^ 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): 589–602. doi:10.1093/mnras/stz3407.
  4. ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 65, ISBN 978-3642297182.
  5. ^ 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.
  6. ^ 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.
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