Venus transits: history and opportunities for planetary, solar and gravitational physics
Costantino Sigismondi, Xiaofan Wang, Patrick Rocher, Eugenio Reis-Neto
TL;DR
This paper compares Venus transit data from 2012 and 2004, introduces a new contact time extrapolation method, and discusses opportunities for planetary, solar, and gravitational physics research, including upcoming Mercury transit observations.
Contribution
It presents a novel extrapolation technique for contact times and analyzes transit data to improve measurements of solar and planetary parameters.
Findings
Comparison of 2012 and 2004 Venus transit data
Introduction of a new contact time extrapolation method
Preparation for Mercury transit observations in 2016
Abstract
The data of 2012 transit of Venus are compared with the ones of 2004. The thickness of the atmosphere of Venus, its aureole and the effect of oblateness and other asphericities in the figure of the Sun are taken into consideration, as well as the black drop effect. A new extrapolation method for the contact times is presented. The next Mercury transit in 2016 will be fully visible from Europe, and the data will be gathered in view of this new method of analysis, to obtain the solar diameter.
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