217 Eudora

217 Eudora
	3D model based on lightcurve data
Discovery
Discovered by	J. Coggia
Discovery date	30 August 1880
Designations
MPC designation	(217) Eudora
Pronunciation	/juːˈdɔːrə/
Named after	Eudora
Alternative designations	A880 QA, 1914 RA
Minor planet category	Main belt
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	130.48 yr (47657 d)
Aphelion	3.75541 AU (561.801 Gm)
Perihelion	1.98080 AU (296.323 Gm)
Semi-major axis	2.86811 AU (429.063 Gm)
Eccentricity	0.30937
Orbital period (sidereal)	4.86 yr (1774.2 d)
Average orbital speed	17.57 km/s
Mean anomaly	349.290°
Mean motion	0° 12m 10.49s / day
Inclination	10.5165°
Longitude of ascending node	162.594°
Argument of perihelion	155.320°
Physical characteristics
Dimensions	66.24±2.3 km; 68.62 ± 1.41 km
Mass	(1.52 ± 0.06) × 1018 kg
Mean density	8.98 ± 0.65 g/cm3
Synodic rotation period	25.272 h (1.0530 d); 25.253 ± 0.003 hr
Geometric albedo	0.0484±0.004
Spectral type	C
Absolute magnitude (H)	9.80

217 Eudora is a large Main belt asteroid. It was discovered by French (Corsican) astronomer J. Coggia on August 30, 1880, in Marseilles, France. It was his fourth asteroid discovery and is named after Eudora, a Hyad in Greek mythology.

It probably has a composition similar to carbonaceous chondrites. In 2007, a study showed it rotates every 25.253 ± 0.003 hours, based on lightcurve data.^[4] A light curve generated from photometric observations at Pulkovo Observatory, give a matching rotation period of 25.253 ± 0.002 hours and a brightness variation of 0.22 ± 0.04 in magnitude.^[5]

References

^ Noah Webster (1884) A Practical Dictionary of the English Language
^ ^a ^b ^c "217 Eudora". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
^ ^a ^b ^c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
^ ^a ^b Buchheim, Robert K. (March 2007), "Lightcurves for 122 Gerda, 217 Eudora, 631 Phillipina, 670 Ottegebe, and 972 Cohnia", The Minor Planet Bulletin, vol. 34, no. 1, pp. 113–14, Bibcode:2007MPBu...34...13B.
^ Pilcher, Frederick (October 2011), "Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana", The Minor Planet Bulletin, vol. 38, no. 4, pp. 183–185, Bibcode:2011MPBu...38..183P.

External links

The Asteroid Orbital Elements Database
Minor Planet Discovery Circumstances
Asteroid Lightcurve Data File
217 Eudora at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
217 Eudora at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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[1] Noah Webster (1884) A Practical Dictionary of the English Language

[jpldata-2] "217 Eudora". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.

[Carry2012-3] Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.

[Buchheim2007-4] Buchheim, Robert K. (March 2007), "Lightcurves for 122 Gerda, 217 Eudora, 631 Phillipina, 670 Ottegebe, and 972 Cohnia", The Minor Planet Bulletin, vol. 34, no. 1, pp. 113–14, Bibcode:2007MPBu...34...13B.

[Pilcher2011-5] Pilcher, Frederick (October 2011), "Rotation Period Determinations for 11 Parthenope, 38 Leda, 111 Ate 194 Prokne, 217 Eudora, and 224 Oceana", The Minor Planet Bulletin, vol. 38, no. 4, pp. 183–185, Bibcode:2011MPBu...38..183P.

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217 Eudora

See also

References

External links

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