|Discovered by||Jean Chacornac|
|Discovery date||September 12, 1860|
|Epoch December 31, 2006 (JD 2454100.5)|
|Aphelion||453.624 Gm (3.032 AU)|
|Perihelion||358.808 Gm (2.398 AU)|
|406.216 Gm (2.715 AU)|
|1634.355 d (4.47 a)|
Average orbital speed
|Dimensions||164.8 ± 6.0 km|
|Mass||(3.00 ± 0.50) × 1018 kg|
|1.30 ± 0.26 g/cm3|
A controversy arose over the naming of Elpis. Urbain Le Verrier, director of the Paris Observatory, at first refused to allow Chacornac to name the object, because Leverrier was promoting a plan to reorganize asteroid nomenclature by naming them after their discoverers, rather than mythological figures. A protest arose among astronomers. At the Vienna Observatory, Edmund Weiss, who had been studying the asteroid, asked the observatory's director, Karl L. Littrow, to name it. Littrow chose Elpis, a Greek personification of hope, in reference to the favorable political conditions in Europe at the time. In 1862, Leverrier permitted Chacornac to choose a name, and he selected "Olympia" at the suggestion of John Russell Hind. However, Elpis is the name that stuck.
- "JPL Small-Body Database Browser: 59 Elpis" (2011-09-01 last obs). Jet Propulsion Laboratory. Retrieved 2012-01-26.
- Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- Asteroid Data Sets
- Appletons' annual cyclopaedia and register of important events of the year: 1862. New York: D. Appleton & Company. 1863. p. 173.
- Lutz D. Schmadel, Dictionary of Minor Planet Names, p.20-1.
- "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. Retrieved 2012-01-26.
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