38 Leda

Leda (minor planet designation: 38 Leda) is a main-belt asteroid. It was discovered by Jean Chacornac on January 12, 1856. He named the asteroid after Leda, the mother of Helen of Troy.

38 Leda

A three-dimensional model of 38 Leda based on its light curve
Discovery
Discovered by	J. Chacornac
Discovery date	January 12, 1856
Designations
MPC designation	(38) Leda
Pronunciation	/ˈliːdə/[1]
Named after	Leda
Alternative names	A904 SF; 1949 QO2
Minor planet category	Main belt
Adjectives	Ledean /lɪˈdiːən/ (Latin Lēdæ-us)
Orbital characteristics
Epoch December 31, 2006 (JD 2454100.5)
Aphelion	472.587 Gm (3.159 AU)
Perihelion	348.232 Gm (2.328 AU)
Semi-major axis	410.409 Gm (2.743 AU)
Eccentricity	0.152
Orbital period	1659.725 d (4.54 a)
Average orbital speed	17.88 km/s
Mean anomaly	107.567°
Inclination	6.955°
Longitude of ascending node	295.890°
Argument of perihelion	168.804°
Physical characteristics
Dimensions	115.41 ± 1.33 km[2]
Mass	(5.71 ± 5.47) × 1018 kg[2]
Mean density	7.09 ± 6.79 g/cm3[2]
Surface gravity	0.0324 m/s²
Escape velocity	0.0613 km/s
Rotation period	0.5350 d (12.84 h) [3]
Albedo	0.0618 [3]
Temperature	~170 K
Spectral type	C[3]
Absolute magnitude (H)	8.32