165 Loreley

165 Loreley is a main-belt asteroid that was discovered by C. H. F. Peters on August 9, 1876, in Clinton, New York and named after the Lorelei, a figure in German folklore.

165 Loreley
A three-dimensional model of 165 Loreley based on its light curve.
Discovery
Discovered byC. H. F. Peters
Discovery date9 August 1876
Designations
(165) Loreley
Pronunciation/ˈlɔːrəlaɪ/[1]
main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc139.51 yr (50957 d)
Aphelion3.3904 AU (507.20 Gm)
Perihelion2.8599 AU (427.83 Gm)
3.1251 AU (467.51 Gm)
Eccentricity0.084887
5.52 yr (2017.9 d)
125.88°
0° 10m 42.24s / day
Inclination11.224°
302.53°
347.29°
Earth MOID1.84454 AU (275.939 Gm)
Jupiter MOID1.81383 AU (271.345 Gm)
TJupiter3.180
Physical characteristics
Dimensions180.083±2.064 km[2]
164.92 ± 8.14 km[3]
Mass(1.91 ± 0.19) × 1019 kg[3]
Mean density
8.14 ± 1.46 g/cm3[3]
7.226 h (0.3011 d)[2]
7.22667 h[4]
0.0642±0.004
7.65,[2] 7.76[5]

    In the late 1990s, a network of astronomers worldwide gathered light curve data that was ultimately used to derive the spin states and shape models of 10 new asteroids, including (165) Loreley. The light curve of this asteroid varies by no more than 0.2 in magnitude, while the derived shape model shows multiple flat spots on the surface.[4][6]

    One stellar occultation by Loreley has been observed, on July 20, 2003.

    The asteroid has an oblate shape with a size ratio of 1.26 ± 0.08 between the major and minor axes, as determined from the W. M. Keck Observatory.[7]

    References
    1. "Lorelei". Oxford English Dictionary (3rd ed.). Oxford University Press. September 2005. (Subscription or UK public library membership required.)
    2. Yeomans, Donald K., "165 Loreley", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
    3. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    4. Ďurech, J.; et al. (April 2007), "Physical models of ten asteroids from an observers", Astronomy and Astrophysics, 465 (1), pp. 331–337, Bibcode:2007A&A...465..331D, doi:10.1051/0004-6361:20066347.
    5. Warner, Brian D. (December 2007), "Initial Results of a Dedicated H-G Project", The Minor Planet Bulletin, 34, pp. 113–119, Bibcode:2007MPBu...34..113W.
    6. Durech, J.; et al. (November 2006), "Asteroid brightness and geometry", VizieR On-line Data Catalog: J/A+A/465/331, Bibcode:2006yCat..34650331D.
    7. 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.


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