Title of article :
EPM ephemerides and relativity
Author/Authors :
E. V. Pitjeva، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
9
From page :
170
To page :
178
Abstract :
In the seventies of the last century the EPM ephemerides (Ephemerides of Planets and the Moon) of IAA RAS originated and have been developed since that time. These ephemeri-des are based upon relativistic equations of motion of celestial bodies and light rays and upon relativistic time scales. The updated model of EPM2008 includes the new values of planet masses and other constants, the improved dynamical model with adding Trans-Neptunian Objects and the expanded database (1913-2008). More than 260 parameters have been determined while improving the planetary part of EPM2008 to 550000 observations. EPM2008 have been oriented to ICRF by including into the total solution the VLBI data of spacecraft near the planets. The real uncertainty of EPM ephemerides has been checked by comparison with the JPLʹs DE ephemerides. Some estimates of the post-model parameters have been obtained: |1 - P\ < 0.0002, |1 - y| < 0.0002, G/G = (-5.9 ± 4.4) • 10~14 per year, the statistic zero corrections to the planet perihelion advances.
Keywords :
ephemerides , celestial mechanics , relativity , radar astronomy
Journal title :
Proceedings of the International Astronomical Union
Serial Year :
2009
Journal title :
Proceedings of the International Astronomical Union
Record number :
672929
Link To Document :
بازگشت