714 Ulula

714 Ulula is a main belt asteroid. It is orbiting the Sun near the 3:1 Kirkwood Gap^[4] with a period of 4.04 years and an eccentricity of 0.057. It was discovered by German astronomer J. Helffrich on 18 May 1911 from the Heidelberg Observatory and was named after an order of owls.^[5] The asteroid has a mean radius of 20 km and is spinning with a rotation period of seven hours. Its pole of rotation lies just 4–14° away from the plane of the ecliptic.^[6] The surface spectrum shows a pyroxene chemistry and is consistent with mesosiderites/HED meteorites.^[4]

714 Ulula

A three-dimensional model of 714 Ulula based on its light curve
Discovery
Discovered by	J. Helffrich
Discovery site	Heidelberg Obs.
Discovery date	18 May 1911
Designations
MPC designation	(714) Ulula
Pronunciation	/ˈʌljʊlə/[1][2]
Alternative designations	1911 LW
Orbital characteristics[3]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	104.92 yr (38323 d)
Aphelion	2.6801 AU (400.94 Gm)
Perihelion	2.3892 AU (357.42 Gm)
Semi-major axis	2.5347 AU (379.19 Gm)
Eccentricity	0.057381
Orbital period (sidereal)	4.04 yr (1474.0 d)
Mean anomaly	128.475°
Mean motion	0° 14m 39.264s / day
Inclination	14.271°
Longitude of ascending node	233.847°
Argument of perihelion	232.003°
Physical characteristics
Mean radius	19.59±1.2 km
Synodic rotation period	6.998 h (0.2916 d)
Geometric albedo	0.2711±0.037
Absolute magnitude (H)	9.1