Astronomy:165 Loreley
 Lightcurve-base 3D-model of Loreley on the top with an image of the asteroid on the bottom. | |
| Discovery | |
|---|---|
| Discovered by | C. H. F. Peters |
| Discovery date | 9 August 1876 |
| Designations | |
| (165) Loreley | |
| Pronunciation | /ˈlɔːrəlaɪ/[1] |
| A876 PA; 1948 QS; 1959 PB; 1960 WG | |
| Minor planet category | main belt |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 139.51 yr (50957 d) |
| |{{{apsis}}}|helion}} | 3.3904 astronomical unit|AU (507.20 Gm) |
| |{{{apsis}}}|helion}} | 2.8599 AU (427.83 Gm) |
| 3.1251 AU (467.51 Gm) | |
| Eccentricity | 0.084887 |
| Orbital period | 5.525 yr (2,017.9 d) |
| Mean anomaly | 125.88° |
| Mean motion | 0° 10m 42.24s / day |
| Inclination | 11.224° |
| Longitude of ascending node | 302.53° |
| 347.29° | |
| Earth MOID | 1.84454 AU (275.939 Gm) |
| Jupiter MOID | 1.81383 AU (271.345 Gm) |
| TJupiter | 3.180 |
| Physical characteristics | |
| Dimensions | 180.083±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] |
| Rotation period | 7.226 h (0.3011 d)[2] 7.22667 h[4] |
| Geometric albedo | 0.0642±0.004 |
| Absolute magnitude (H) | 7.65,[2] 7.76[5] |
165 Loreley is a large 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. It is orbiting the Sun at a distance of 3.125 astronomical unit|AU and a low eccentricity of 0.08. The orbital plane is inclined at an angle of 11.2° to the plane of the ecliptic.[2]
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] 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]
Between 2003 and 2021, 165 Loreley has been observed to occult thirteen stars.
References
- ↑ Lorelei (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Lorelei (Subscription or UK public library membership required.)
- ↑ 2.0 2.1 2.2 2.3 2.4 Yeomans, Donald K., "165 Loreley", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=165, retrieved 12 May 2016.
- ↑ 3.0 3.1 3.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ 4.0 4.1 Ďurech, J. et al. (April 2007), "Physical models of ten asteroids from an observers", Astronomy and Astrophysics 465 (1): pp. 331–337, doi:10.1051/0004-6361:20066347, Bibcode: 2007A&A...465..331D.
- ↑ 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.
- ↑ Durech, J. et al. (November 2006), "Asteroid brightness and geometry", VizieR On-line Data Catalog: J/A+A/465/331, Bibcode: 2006yCat..34650331D.
- ↑ 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, doi:10.1016/j.icarus.2006.06.001, PMID 19081813, Bibcode: 2006Icar..185...39M.
External links
- 165 Loreley at AstDyS-2, Asteroids—Dynamic Site
- 165 Loreley at the JPL Small-Body Database
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