277 Elvira
Main-belt asteroid
From Wikipedia, the free encyclopedia
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).[3]
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A three-dimensional model of 277 Elvira based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Auguste Charlois |
| Discovery date | 3 May 1888 |
| Designations | |
| (277) Elvira | |
| A888 JA | |
| 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) | |
| 266.399° | |
| 0° 12m 4.378s / day | |
| Inclination | 1.16250° |
| 231.271° | |
| 137.520° | |
| 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] | |
A group of astronomers, including Lucy DâEscoffier 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 J mâ2 Kâ1 sâ1/2, compared to 50 for lunar regolith and 400 for coarse sand in an atmosphere.[2]
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