Advances in Astronomy and Space Physics, Volume 3, Issue 2 (2013)
On the comparison of fundamental numerical ephemerides
1Taras Shevchenko National University of Kyiv, Glushkova ave. 2, Kyiv, 03680, Ukraine
2Main Astronomical Observatory of the NAS of Ukraine, Akademika Zabolotnoho Str. 27, 03680, Kyiv, Ukraine
2Main Astronomical Observatory of the NAS of Ukraine, Akademika Zabolotnoho Str. 27, 03680, Kyiv, Ukraine
Abstract
We present the results of our comparison of three main numerical ephemerides (DELE, INPOP, EPM) for the determination of precision and errors of their dynamical coordinate systems. It was shown that all of them have comparable levels of precision, however the EPM demonstrates an unusual shift of the coordinate origin. Systematic errors were estimated as well, and mutual shifts of coordinate centres were found.
Keywords:
astrometry, ephemerides, precision estimation