.png) A three-dimensional model of 208 Lacrimosa based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 21 October 1879 |
| Designations | |
| MPC designation | (208) Lacrimosa |
| Pronunciation | /lækrɪˈmoʊsə/ |
| Named after | Our Lady of Sorrows (lacrimōsa) |
| Alternative designations | A879 UB |
| Minor planet category | Main belt (Koronis) |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 115.12 yr (42,049 d) |
| Aphelion | 2.9309 AU (438.46 Gm) |
| Perihelion | 2.85551 AU (427.178 Gm) |
| Semi-major axis | 2.89320 AU (432.817 Gm) |
| Eccentricity | 0.013028 |
| Orbital period (sidereal) | 4.92 yr (1,797.5 d) |
| Average orbital speed | 17.51 km/s |
| Mean anomaly | 209.78° |
| Mean motion | 0° 12 1.008 / day |
| Inclination | 1.7458° |
| Longitude of ascending node | 4.2626° |
| Argument of perihelion | 108.363° |
| Physical characteristics | |
| Dimensions | 41.33±1.7 km |
| Synodic rotation period | 14.085734 h (0.5869056 d) |
| Geometric albedo | 0.2696±0.023 |
| Spectral type | S |
| Absolute magnitude (H) | 8.96 |
208 Lacrimosa is a main-belt asteroid that was discovered by Austrian astronomer Johann Palisa on 21 October 1879 in Pola. The name derives from Our Lady of Sorrows, a title given to Mary, the mother of Jesus. It is orbiting the Sun at a distance of 2.89320 AU with a period of 4.92 yr and an eccentricity (ovalness) of 0.013. The orbital plane is inclined at an angle of 1.7° to the plane of the ecliptic.
During 2003, the asteroid was observed occulting a star. The resulting chords provided a cross-section diameter estimate of 44.3 km. 10μ radiometric data collected from Kitt Peak in 1975 gave a diameter estimate of 42 km for this asteroid. It is classified as an S-type asteroid and is one of the largest members of the Koronis asteroid family. Hence it is probably a piece of the original asteroid that was shattered in an ancient impact that created the family.
References
- ^ Yeomans, Donald K., "208 Lacrimosa", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- Vokrouhlický, D.; et al. (May 2021), "(208) Lacrimosa: A case that missed the Slivan state?", Astronomy & Astrophysics, 649: 18, arXiv:2103.12480, Bibcode:2021A&A...649A..45V, doi:10.1051/0004-6361/202140585, A45.
- Shevchenko, Vasilij G.; Tedesco, Edward F. (September 2006), "Asteroid albedos deduced from stellar occultations", Icarus, 184 (1): 211–220, Bibcode:2006Icar..184..211S, doi:10.1016/j.icarus.2006.04.006.
- Morrison, D.; Chapman, C. R. (March 1976), "Radiometric diameters for an additional 22 asteroids", Astrophysical Journal, vol. 204, pp. 934–939, Bibcode:2008mgm..conf.2594S, doi:10.1142/9789812834300_0469.
- Moore, Patrick; Rees, Robin, eds. (2011), Patrick Moore's Data Book of Astronomy (2nd ed.), Cambridge University Press, pp. 164–165.
External links
- The Asteroid Orbital Elements Database
- Asteroid Lightcurve Data File
- 208 Lacrimosa at AstDyS-2, Asteroids—Dynamic Site
- 208 Lacrimosa at the JPL Small-Body Database
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