From the proper motions of 222185 PPM stars the correction to the value of the IAU 1976 luni-solar precession was found to be ¡0:38§0:05 arcsec per century. The value is in a good agreement with the result obtained from VLBI observations of extragalactic radio sources. (Walter and C.Ma, 1994). In the magnitude ranges 6-8 and 10-13 the component ¹ cos(±) yields the correction to precession which strongly deviates from the above mentioned value. The reduction procedure to free the proper motions of the PPM of quasi-precessional magnitude equation and to make them compatible with the newest value of the luni-solar precession is proposed.
|Title of host publication||Proceedings "Modern problems and methods of astrometry and geodynamics", St. Petersburg, 1996|
|Publication status||Published - 1996|
Vityazev, V. V., & Tsvetkov, A. S. (1996). Luni-solar precession derived from proper motions of PPM. In Proceedings "Modern problems and methods of astrometry and geodynamics", St. Petersburg, 1996 (pp. 1-6)