523 Ada

523 Ada is a minor planet orbiting the Sun. It was discovered January 29, 1904, by American astronomer Raymond S. Dugan at Heidelberg, Germany and was named after his friend Ada Helme. CCD images collected during the fall of 2004 at Oakley Observatory in Terre Haute, Indiana, were used to generate a lightcurve for the object, showing a rotation period of 10.03 ± 0.01 hours.^[2]

523 Ada

Discovery
Discovered by	Raymond Smith Dugan
Discovery site	Heidelberg
Discovery date	27 January 1904
Designations
MPC designation	(523) Ada
Alternative designations	1904 ND
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	113.46 yr (41442 d)
Aphelion	3.4869 AU (521.63 Gm)
Perihelion	2.4517 AU (366.77 Gm)
Semi-major axis	2.9693 AU (444.20 Gm)
Eccentricity	0.17432
Orbital period (sidereal)	5.12 yr (1868.9 d)
Mean anomaly	31.6678°
Mean motion	0° 11m 33.468s / day
Inclination	4.2955°
Longitude of ascending node	260.837°
Argument of perihelion	189.461°
Physical characteristics
Mean radius	15.945±0.75 km
Synodic rotation period	10.03 ± 0.01 hr[2] 10.03 h (0.418 d)[1]
Geometric albedo	0.2512±0.026[1]
Absolute magnitude (H)	9.9[1]