Mean value of the solar radius obtained at the Côte d'Azur Observatory (Solar Astrolabe of Calern Site, 1975-1998).

Details Mean value of the solar radius obtained at the Côte d'Azur Observatory (Solar Astrolabe of Calern Site, 1975-1998). Mean value of the solar radius obtained at the Côte d'Azur Observatory (Solar Astrolabe of Calern Site, 1975-1998).

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999crasb.327..645l&link_type=abstract

Comptes Rendus de l'Academie des Sciences, Sér. II, Fasc. b, Tome 327, No. 6, p. 645 - 652

Astronomy and Astrophysics

Astronomy

11

Sun: Diameter

Scientific paper

The authors propose a mean value for the solar radius based on by a program of visual observations and CCD measurements carried out at the Côte d'Azur Observatory between 1975 and 1998. The working assumption is that there are no variations in the semi-diameter. Over a set of more than 8000 observations, the mean valur amounts to 959.51±0.01″for a solar radius seen from a distance of 1 astronomical unit. As visual and CCD series are closely linked, the coherence of the results calls for some qualification of visual observations.

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