Fig. 12

Correlation between osculating longitude of node Ω (abscissa) and longitude of perihelion ϖ (ordinate) for Datura members. Large diamond is (1270) Datura, black symbols are for multi-opposition members and gray symbols are for single-opposition members. Formal one sigma uncertainty of Ω and ϖ are shown by error-bars, often smaller than the symbols. The open symbols are for asteroids 2015 DY94 (left) and 2015 PQ47 (right) whose orbits are very uncertain at this moment. The dashed line has a slope ≃−0.5. Asteroids with negative difference ΔΩ with respect to (1270) Datura have larger value of the proper semimajor axis and vice versa. Those with ΔΩ approximately in between −12° and −5° are captured in the M9/16 mean motion resonance with Mars.
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