746 Marlu

746 Marlu
	Modelled shape of Marlu from its lightcurve
Discovery
Discovered by	F. Kaiser
Discovery site	Heidelberg Obs.
Discovery date	1 March 1913
Designations
MPC designation	(746) Marlu
Named after	Marie-Louise Kaiser; (Discoverer's daughter)
Alternative designations	A913 EJ · 1926 WA; 1975 XN · 1913 QY
Minor planet category	main-belt · (outer); background ;
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 0
Observation arc	104.37 yr (38,122 d)
Aphelion	3.8461 AU
Perihelion	2.3728 AU
Semi-major axis	3.1094 AU
Eccentricity	0.2369
Orbital period (sidereal)	5.48 yr (2,003 d)
Mean anomaly	60.352°
Mean motion	0° 10m 47.28s / day
Inclination	17.480°
Longitude of ascending node	1.9385°
Argument of perihelion	306.79°
Physical characteristics
Dimensions	72.0 km × 65.0 km
Mean diameter	69.75±4.0 km; 71.55±1.41 km; 74.274±1.122 km;
Synodic rotation period	7.787 h
Pole ecliptic latitude	(202.0°, −66.0°) (λ1/β1); (64.0°, −27.0°) (λ2/β2);
Geometric albedo	0.032±0.007; 0.036±0.002; 0.0363±0.005;
Spectral type	Tholen = P ; P (S3OS2-TH); C (S3OS2-BB); C (SDSS-MOC); B–V = 0.726±0.028; U–B = 0.283±0.050;
Absolute magnitude (H)	9.8; 10.00;

746 Marlu (prov. designation: A913 EJ or 1913 QY) is a dark and large background asteroid from the outer regions of the asteroid belt, approximately 72 kilometers (45 miles) in diameter. It was discovered on 1 March 1913, by German astronomer Franz Kaiser at the Heidelberg Observatory in southwest Germany. The primitive P-type asteroid has a rotation period of 7.8 hours. It was named after the discoverer's daughter, Marie-Louise Kaiser.

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