277 Elvira
|
A three-dimensional model of 277 Elvira based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 3 May 1888 |
| Designations | |
| Main belt (Koronis) | |
| Orbital characteristics[1] | |
| 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) |
| 2.88422 AU (431.473 Gm) | |
| Eccentricity | 0.091498 |
| 4.90 yr (1789.1 d) | |
Average orbital speed | 17.53 km/s |
| 266.399° | |
| 0° 12m 4.378s / day | |
| Inclination | 1.16250° |
| 231.271° | |
| 137.520° | |
| Earth MOID | 1.61832 AU (242.097 Gm) |
| Jupiter MOID | 2.30065 AU (344.172 Gm) |
| Jupiter Tisserand parameter | 3.287 |
| Physical characteristics | |
| Dimensions |
27.19±0.9 km[1] 27.19 km[2] |
| 29.69 h (1.237 d) | |
|
0.2770±0.020[1] 0.277[2] | |
| 9.84[1][2] | |
|
| |
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277 Elvira is a typical main belt asteroid and is a member of the Koronis asteroid family. It was discovered by Auguste Charlois on May 3, 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).[3]
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.[4]
Measurements of the thermal inertia of 277 Elvira give a value of around 190 m−2 K−1 s−1/2, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere.[2]
References
- 1 2 3 4 "277 Elvira". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
- 1 2 3 4 Delbo', Marco; Tanga, Paolo (February 2009), "Thermal inertia of main belt asteroids smaller than 100 km from IRAS data", Planetary and Space Science, 57 (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.
