Statistics – Computation
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.500..429m&link_type=abstract
In: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany. Ed
Statistics
Computation
Minor Planets: Observations, Astrometry
Scientific paper
Along the last decades we have lived a quick evolution in the field of the Celestial Reference Systems. The new scientific and technological means have allowed us to improve the definitions of the reference systems and the compilation of new and better materializations for their associated reference frames. So, in a few years, the FK5 has substituted the old FK4 as the fundamental catalog while the Hipparcos catalogue plays nowadays this paper in substitution of the FK5 in visual wavelengths. This evolution has caused the old observations of asteroids obtained from catalogs referred to old reference systems to be now obsolete. In some cases, the observations may be recomputed in the new massive catalogs recently compiled, but in other worse cases this computation is not possible possibly due to the loss of fundamental data. In these last cases, the data are lost for astrometrical effects. In our paper, we propose two main objectives. In the first place, we try to obtain a method to homogenize different catalogues referred to the same reference system. This aim will be arranged by means of the minimization of the residual function, which will be previously represented by means of a development in a set of suitable functions. This method will be similar to the one developed by (Bien, R. et al. 1978) and (Schwan, H. 1977). In the second place, we shall propose a practical application of the last process arranging the homogenization of several catalogs and, afterwards, we shall compare minor planets positions corrected by means of the previously obtained catalog corrections with the positions obtained taking the Hipparcos as the reference frame.
López Ortí J. A.
Marco Castillo F. J.
Martínez Usó M. J.
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