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 |
±0.9 km 27.19[1] 27.19 km[2] |
29.69 h (1.237 d) | |
±0.020 0.2770[1] 0.277[2] | |
9.84[1][2] | |
|
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.