1. The semi-major axis of the companion is 0.23 arcseconds on the sky. 2. Where T is the period and a is the semi-major axis . 3. For the special case of a circle, the semi-major axis is the radius. 4. The semi-major axis for this Keplerian orbit is an estimated 0.6873 Astronomical Units. 5. This is the major axis of the ellipse, its greatest diameter. 6. Orbital periods are 7.1 days and it presents a semi-major axis 0.099 AU. 7. Orbital perturbation : changes in Asbolus semi-major axis during the next 5500 years. 8. They correspond to the semi-major axis and semi-minor axis of the appropriate ellipses. 9. More technically, it is the mean semi-major axis of the geocentric lunar orbit. 10. The resulting eccentricity and semi-major axis distributions resemble that of the current asteroid belt.
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