718 Erida

718 Erida is a minor planet orbiting the Sun. It was discovered at Vienna on September 29, 1911, by Austrian astronomer Johann Palisa,^[2] and was named for Erida Leuschner, daughter of astronomer Armin Otto Leuschner.^[3] It is orbiting at a distance of 3.06 AU with a period of 5.34 yr and an eccentricity of 0.20. The orbital plane of this asteroid is inclined by an angle of 6.9° to the plane of the ecliptic.^[1]

718 Erida

Discovery
Discovered by	J. Palisa
Discovery site	Vienna Obs.
Discovery date	29 September 1911
Designations
MPC designation	(718) Erida
Alternative designations	1911 MS
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	113.31 yr (41,388 d)
Aphelion	3.6666 AU (548.52 Gm)
Perihelion	2.4451 AU (365.78 Gm)
Semi-major axis	3.0559 AU (457.16 Gm)
Eccentricity	0.19985
Orbital period (sidereal)	5.34 yr (1,951.2 d)
Mean anomaly	5.10173°
Mean motion	0° 11m 4.2s / day
Inclination	6.9294°
Longitude of ascending node	38.538°
Argument of perihelion	174.377°
Physical characteristics
Mean radius	36.47±2.45 km
Synodic rotation period	17.447 h (0.7270 d)
Geometric albedo	0.0399±0.006
Absolute magnitude (H)	9.6

Photometric observations made during 2009 were used to produce a light curve for this asteroid that showed a rotation period of 17.447±0.002 h with a brightness variation of 0.37 in magnitude.^[4] It spans a girth of approximately 72 km.^[1]