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195 Eurykleia

195 Eurykleia
Discovery
3D convex shape model of 195 Eurykleia
Discovered by	J. Palisa, 1879
Discovery date	19 April 1879
Designations
MPC designation	(195) Eurykleia
Pronunciation	/jʊrɪˈkliːə/^[1]
Alternative designations	A879 HA; 1949 QB₂
Minor planet category	Main belt
Orbital characteristics^[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	131.99 yr (48,208 d)
Aphelion	3.00 AU (449.33 Gm)
Perihelion	2.75 AU (411.29 Gm)
Semi-major axis	2.88 AU (430.30 Gm)
Eccentricity	0.044205
Orbital period (sidereal)	4.88 yr (1,781.9 d)
Mean anomaly	113.56°
Mean motion	0° 12^m 7.308^s / day
Inclination	6.9718°
Longitude of ascending node	6.9930°
Argument of perihelion	119.12°
Earth MOID	1.77 AU (264.87 Gm)
Jupiter MOID	2.01 AU (300.95 Gm)
T_Jupiter	3.284
Physical characteristics
Mean radius	42.855±0.85 km
Synodic rotation period	16.52178±0.00001 h^[3]
Geometric albedo	0.0599±0.002
Spectral type	Ch^[3]
Absolute magnitude (H)	9.01

Eurykleia (minor planet designation: 195 Eurykleia) is a fairly large main belt asteroid. It was discovered by the Austrian astronomer Johann Palisa on April 19, 1879, and named after Euryclea, the wet-nurseofOdysseusinThe Odyssey.

This body is orbiting the Sun with a period of 4.88 years and a low eccentricity (ovalness) of 0.04. The orbital planeisinclined by 7° from the plane of the ecliptic. It is spinning with a rotation period of 16.5 hours and varies in brightness with an amplitude of 0.24 magnitude. The cross-section diameter of this body is 43 km. The asteroid has a taxonomic type of Ch in the SMASS classification,^[3] which indicates it has a dark surface with a primitive carbonaceous composition.

195 Eurykleia has been observed to occult stars twice, once in 2011 and again in 2021.

References[edit]

^ "195 Eurykleia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 6 May 2016.

^ ^a ^b ^c Marciniak, A.; et al. (May 2019). "Thermal properties of slowly rotating asteroids: results from a targeted survey". Astronomy & Astrophysics. 625: 40. arXiv:1905.06056. Bibcode:2019A&A...625A.139M. doi:10.1051/0004-6361/201935129. A139.

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