Using an existing framework for the evaluation of direct detection missions, we address this question by incorporating data which may be generated by an. Semi-major axis of the orbit can be recovered with a median relative error ofħ% (6%). A recent source of debate in the exoplanet community has been the question of whether an astrometry 'precursor' mission is required in order for a direct detection mission to succeed. Positional radar astrometry can reduce trajectory uncertainties several orders of magnitude, improving prediction, targeting, and impact probability estimates. The period is the orbital parameter that can be determined with the bestĪccuracy, with a median relative difference between input and output periods ofĤ.2% (2.9%) assuming a 5 yr (10 yr) mission. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Existing ground-based planetary radar sites provide unique centimeter and few-meter level measurements of the state and nature of small-bodies. Respectively, assuming a 10 yr mission, a 4 au semi-major axis, and a 1 M_sun This sets the maximum distance to which a planet isĭetectable to ~70 pc and ~3.5 pc for a Jupiter-mass and Neptune-mass planet, We find that there is a 50% chance of detecting a planet with a Information criterion, and <0.02% (<0.06%) when using the Bayesian informationĬriterion. Mission and using the Akaike information criterion or the Watanabe-Akaike
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