277 Elvira

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277 Elvira
277Elvira (Lightcurve Inversion).png
A three-dimensional model of 277 Elvira based on its light curve.
Discovered by Auguste Charlois
Discovery date May 3, 1888
Main belt (Koronis)
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion 470.106 Gm (3.142 AU)
Perihelion 393.543 Gm (2.631 AU)
431.825 Gm (2.887 AU)
Eccentricity 0.089
1791.278 d (4.9 a)
17.53 km/s
Inclination 1.156°
Physical characteristics
Dimensions 27.19[1] km
Albedo 0.277[1]

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).[2]

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.[3]

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.[1]


  1. ^ a b c d 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): 259–265, arXiv:0808.0869, Bibcode:2009P&SS...57..259D, doi:10.1016/j.pss.2008.06.015. 
  2. ^ Schmadel Lutz D. Dictionary of Minor Planet Names (fifth edition), Springer, 2003. ISBN 3-540-00238-3.
  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.