Topic summary
Alinda group
Extracted from the Wikipedia article Alinda asteroid.
Dynamic age
The 3:1 resonance with Jupiter causes a repeating growth in the eccentricity of the asteroid's orbit. Dynamically young members have an eccentricity ranging from about 0.30 to 0.34 staying mostly in the asteroid belt ranging 1.7–3.4 AU from the Sun. Older members such as 8709 Kadlu have eccentricities between 0.465 and 0.475 and cross the orbit of Mars. (8709 Kadlu makes approaches close enough to Jupiter, Mars, and Earth to be gravitationally nudged.) The oldest members with eccentricities between 0.57 and 0.75 cross the orbit of Earth. 3360 Syrinx is the most eccentric of the Alinda group with an eccentricity of 0.7 and the orbit has a dynamically short life expectancy.