217 Eudora

217 Eudora is a large Main belt asteroid. It was discovered by French (Corsican) astronomer Jérôme Eugène Coggia on August 30, 1880, in Marseille, France. It was his fourth asteroid discovery and is probably named after Eudora, one of the Hyades in Greek mythology.^[5]

DiscoveredbyJ. Coggia

Discoverydate30 August 1880

MPCdesignation

(217) Eudora

Pronunciation/juːˈdɔːrə/^[1]

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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/[1]
Named after	Eudora
Alternative designations	A880 QA, 1914 RA
Minor planet category	Main belt
Orbital characteristics[2]
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[2] 68.62 ± 1.41 km[3]
Mass	(1.52 ± 0.06) × 1018 kg[3]
Mean density	8.98 ± 0.65 g/cm3[3]
Synodic rotation period	25.272 h (1.0530 d)[2] 25.253 ± 0.003 hr[4]
Geometric albedo	0.0484±0.004
Spectral type	C
Absolute magnitude (H)	9.80

Close

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.^[6]