#:The effect of Relativity on this is, of course, the precession of the "perihelion" due to the effects of General Relativity. From the information that has been gathered, the precession should be about 1.14 arcseconds per Earth century, or about 1/37<sup>th</sup> that of Mercury. The precession of Mercury was established with accurate visual observations. Measuring something 1/37<sup>th</sup> as large, from the Doppler shift in spectroscopic measurements, is utterly beyond current technology. Other than that, there is no reason to consider relativity. Classical mechanics will do just fine. | #:The effect of Relativity on this is, of course, the precession of the "perihelion" due to the effects of General Relativity. From the information that has been gathered, the precession should be about 1.14 arcseconds per Earth century, or about 1/37<sup>th</sup> that of Mercury. The precession of Mercury was established with accurate visual observations. Measuring something 1/37<sup>th</sup> as large, from the Doppler shift in spectroscopic measurements, is utterly beyond current technology. Other than that, there is no reason to consider relativity. Classical mechanics will do just fine. |