Shell obliquity εsh (left) and deviation δsh (right) over 30 years beginning on J2000 (black for the solid case, red for model 1 and green for model 2). The vertical blue lines show the observation period of Stiles et al. (2008) and the blue boxes represent our estimated obliquity (0.32° ± 3σ) and deviation (0.12° ± 3σ).
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