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Apparent solar diameter and Basic Heliographic Data 2010
The rotation axis of the Sun, as we know it today, was determined from the proper motion of sunspots by Carrington (1863). The solar axis is inclined toward the Ecliptic by an amount varying from +7o15’ to -7o15’. Furthermore, the position of solar axis is variable with respect to the north-south direction or respect to the great circle that passes through the celestial poles and the center of the Sun. This variation of the solar axis reaches the relatively large amount from +26o22’ to -26o22’. By table bellows we present day nottion B0 (heliographic latitude of the solar disk),
position angle of solar rotational axis from the north-south direction P0 and the longitude of center of solar disk L0.
The table data are calculated for 12:00 UT.
 

Basic solar parameters and information

The concept of an internationally standardized system of units (astronomical units or astronomical constants) is one of the most fundamental in experimental science. Here you can found some basic parameters and information of the Sun. This information is in accordance by XVIth General Assembly, Grenoble, France, 1976 (pdf) of International Astronomical Union.

 
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