The data base contains the results of measurements of the Newtonian
gravitational constant G carried out from 1985 to recent time.
It was accumulated 50 series of digital results of G measurements.
In Table 1 there are the numbers
of files and average results of G measured values.
Each of these values was obtained using the special system which
consists of the torsion balance itself housed in the vacuum chamber,
the test mass consisted of a cylindrical beam 23 cm long and 1.8 mm in
diameter with its axis horizontal and with a 1.6 g sperical mass of
diameter 7.2 mm at each end, the sourse-mass system consisted of two
spherical masses at opposite ends of the suspended test mass with
their centers aligned with the axis of the suspended beam (these
masses could be moved individually or together along this axis), the
optoelectronic angular displacement transducer which monitors the
movement of the suspended beam. The system is self-contained and
The programm with two independent versions of calculation
for G was developed. In one version an analytical formula
which was received in view of the members of the fifth degree in
decomposition of the moment of forces of an attraction of cooperating
weights is used. In the other the calculations are carried out on the
differential equation of movement of the torsion balance working body
in view of the moment of forces created in the large masses.
Based on the results of the experiments agregated with the
corresponding weight and take into account the key sources of the
meterage's error, the average gravitation constant is defined as:
G = (6.6729 ± 0.0005) . 10
-11 N . m
2 kg -2 .
The value of Newtonian gravitational constant G
recommended in 1998 by the
CODATA Task Group on Fundamental Constants is
G = 6.673 . 10
-11 N . m
2 kg -2 .
The results of gravitational constant definitions, received by the
different authors with the use of various external (attractive) masses
are presented in Table 2 .
Data files and program for data processing are on this site.
You can find there file "readme_en" with
description of the program .
During the course of the measurements, a temporal shift of up
to 0.001G and of unknown cause was observed in the values obtained.
The processing of arrays with the help of spreadsheets has revealed in
the results of G measurements some known space rhythms (solar,
lunar, stars), which explanations yet have not been found.
Variations of the averaged through the
twenty four hours values of G
The similar results are detected also by other authors,
investigating for a long time the periods of nucleuses half-lifes,
biological rhythms, heliogeophysical electromagnetic perturbations.
In particular, it is revealed, that the extremely high values of G
fall on the minima of magnetic activity. The level of ionosphere perturbation
generated by the solar chromosphere flares influences on dispersion of