.png) A three-dimensional model of 277 Elvira based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 3 May 1888 |
| Designations | |
| MPC designation | (277) Elvira |
| Alternative designations | A888 JA |
| Minor planet category | Main belt (Koronis) |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 116.65 yr (42607 d) |
| Aphelion | 3.14812 AU (470.952 Gm) |
| Perihelion | 2.62032 AU (391.994 Gm) |
| Semi-major axis | 2.88422 AU (431.473 Gm) |
| Eccentricity | 0.091498 |
| Orbital period (sidereal) | 4.90 yr (1789.1 d) |
| Mean anomaly | 266.399° |
| Mean motion | 0° 12 4.378 / day |
| Inclination | 1.16250° |
| Longitude of ascending node | 231.271° |
| Argument of perihelion | 137.520° |
| Physical characteristics | |
| Dimensions | 27.19±0.9 km 27.19 km |
| Synodic rotation period | 29.69 h (1.237 d) |
| Geometric albedo | 0.2770±0.020 0.277 |
| Absolute magnitude (H) | 9.84 |
277 Elvira is a typical main belt asteroid and is a member of the Koronis asteroid family. It was discovered by Auguste Charlois on 3 May 1888 in Nice. 277 Elvira is possibly named for a character in Alphonse de Lamartine's Méditations poétiques (1820) and Harmonies poétiques et religieuses (1830).
A group of astronomers, including Lucy D’Escoffier Crespo da Silva and Richard P. Binzel, used observations made between 1998 through 2000 to determine the spin-vector alignment of the Koronis family of asteroids, including 277 Elvira. The collaborative work resulted in the creation of 61 new individual rotation lightcurves to augment previous published observations.
Measurements of the thermal inertia of 277 Elvira give a value of around 190 J m K s, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere.
References
- ^ "277 Elvira". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
- ^ Delbo', Marco; Tanga, Paolo (February 2009), "Thermal inertia of main belt asteroids smaller than 100 km from IRAS data", Planetary and Space Science, vol. 57, no. 2, pp. 259–265, arXiv:0808.0869, Bibcode:2009P&SS...57..259D, doi:10.1016/j.pss.2008.06.015.
- Schmadel Lutz D. Dictionary of Minor Planet Names (fifth edition), Springer, 2003. ISBN 3-540-00238-3.
- Slivan, S. M., Binzel, R. P., Crespo da Silva, L. D., Kaasalainen, M., Lyndaker, M. M., Krco, M.: "Spin vectors in the Koronis family: comprehensive results from two independent analyses of 213 rotation lightcurves",Icarus, 162, 2003, pp. 285–307.
External links
- 277 Elvira at AstDyS-2, Asteroids—Dynamic Site
- 277 Elvira at the JPL Small-Body Database
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