On the possibility of measuring solar flattening from photometry measurements taken during solar eclipses seen from the Earth’s Surface or Earth Orbit-Reference-Cited by-同舟云学术

On the possibility of measuring solar flattening from photometry measurements taken during solar eclipses seen from the Earth’s Surface or Earth Orbit

Published:2023-02-20 Issue: Volume: Page:
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Author:

Wang Yunbo¹,Yan Jianguo¹,Barriot Jean-Pierre²

Affiliation:

1. Wuhan University

2. University of French Polynesia

Abstract

Abstract Solar oblateness is a key parameter that provides a strong constraint for understanding the variations in total solar irradiance as well as the differential rotation of the Sun. Furthermore, it takes part in the evaluation of General Relativity theory. In this paper, we propose a procedure to measure solar flattening based on modeling the light curve during a solar eclipse observed from the ground or from the Earth orbit. We apply this procedure to the solar eclipse observed from Lakeland (Queensland, North Australia) on November 13, 2012. The results show that accurate measurements of the solar equator-to-polar radius difference can reach 1 km when based on the current DE430 ephemeris and the LRO DEM data (equivalent to 1.4 10− 6 in solar oblateness).

Publisher

Research Square Platform LLC

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