Astron. Astrophys. Suppl. Ser. 143, 265-267
Solar diameter observations at Observatório Nacional in 1998-1999
S. Puliaev12 - J.L. Penna1 - E.G. Jilinski12 - A.H. Andrei1
Send offprint request: S. Puliaev, Observatório Nacional/CNPq, R. Gal.
José Cristino 77, CEP20921-400, Rio de Janeiro, Brasil.
1 - Observatório Nacional/CNPq, Brasil
2 - Pulkovo Observatory, Russia
Received September 2, 1999; accepted February 3, 2000
As of June 1999, about 9000 observations have been made. The mean value of the apparent semi-diameter is 95913 0 01.
Here we report on the results obtained between July 1998 and June 1999. In 162 days 4276 observations were made. For this period the mean apparent semi-diameter is 95907 0 02. No significant difference between the apparent semi-diameters is found as observed on the East and West sides of the meridian.
The results of the observations are updated every month and available in electronic form in the SIMBAD database and at the World Wide Web page of the ON, Solar Radius Data: http://obsn.on.br/radius/.
Key words: Sun: general, fundamental parameters
Copyright The European Southern Observatory (ESO)