Abstract
According to IAU recommendations for the improvement of the specification of the fundamental reference system, the positions and centennial variations in the FK5 shall correspond as closely as possible to the dynamical reference frame. Described here is the status of work on the determination of a correction to the FK4 equinox and a correction to the proper motions in right ascension of the FK4 such that the equinox of the FK5 corresponds at all times as closely as possible to the dynamical equinox. Evidence is presented for a correction to the right ascensions of the FK4 (equinox correction) of aboutE=+0s.050 at 1960, and for a correction to the FK4 proper motions of about Δμα = É = +1.25 per century. This investigation has given new findings on the deficiencies of older equinox determinations that have given rise to confusion for a long time. Concerning the determination of the equator point of the FK5 it appears that available new data do not support a significant correction to the FK4.
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References
Asteriadis, G.: 1977,Astron. J. 56, 25.
Bien, R., Fricke, W., Lederle, T., and Schwan, H.: 1978,Veröff. Astron. Rechen-Institut Heidelberg, No. 29. Verlag G. Braun, Karlsruhe.
Blackwell, K. C.: 1977,Monthly Notices R.A.S. 180, 65 p.
Branham, R. L.: 1978,Astron. J. 83, 675.
Duma, D. P.: 1974,Determination of Zero-points and Periodic Errors of Star Catalogues (in Russian). Kiev.
Duncombe, R. L., Seidelmann, P. K., and Van Flandern, T. C.: 1974: In ‘On Reference Coordinate Systems for Earth Dynamics’. IAU Coll. No. 26, p. 223. Eds. B. Kolaczek, G. Weiffenbach, Warsaw, Poland.
Duncombe, R. L., Fricke, W., Seidelmann, P. K., and Wilkins, G. A.: 1977,Transactions IAU Vol. XVI B, 56.
Elsmore, B.: 1979 In ‘Modern Astrometry’. IAU Coll. No. 48, p. 93. Eds. F. V. Prochazka, R. H. Tucker, Univ. Obs. Vienna 1979.
Fricke, W.: 1967,Astron. J. 72, 1368.
Fricke, W.: 1974, In ‘New Problems of Astrometry’, Proc. IAU Symp. No. 61, p. 23. Eds. W. Gliese, C. A. Murray, R. H. Tucker. Reidel Publ. Comp., Dordrecht-Holland.
Fricke, W.: 1977,Veröff. Astron. Rechen-Institut, No. 28. Verlag G. Braun, Karlsruhe.
Fricke, W.: 1978, In ‘Dynamics of the Solar System. IAU Symp. No. 81, p. 133. Ed. R. L. Duncombe. Reidel Publ. Comp., Dordrecht-Holland.
Fricke, W. and Gliese, W.: 1979, In ‘Modern Astrometry’. IAU Coll. No. 48, p. 421. Eds. F. V. Prochazka, R. H. Tucker. Univ. Obs. Vienna 1979.
Gavurin, M. K.: 1962,Zh. Nat. Mat. Fiz 2, 287.
Johnston, K. J.: 1979, In ‘Modern Astrometry’. IAU Coll. No. 48, p. 175, Eds. F. V. Prochazka, R. H. Tucker. Univ. Obs. Vienna 1979.
Kahrstedt, A.: 1931,Astron. Nachr. 44, 33.
Knox-Shaw, H., Jackson, J., and Robinson, W. H.: 1932,Hornsby's Meridian Observations made at the Radcliffe Observatory in the Years 1774 to 1798, Oxford University Press, London.
Laubscher, R. E.: 1976,Astron. Astrophys. 10, 101.
Lieske, J. H., Lederle, T., Fricke, W., and Morando, B.: 1977,Astron. Astrophys. 58, 1.
Martin, C. F. and Van Flandern, T. C.: 1970,Science 168, 246.
Møller, O.: 1978, In ‘Astron. Papers dedicated to B. Strömgren’, p. 355. Eds. A. Reiz, T. Andersen, Copenhagen Univ. Obs.
Morgan, H. R.: 1931,Astron. J. 41, 177.
Morrison, L. V.: 1979,Monthly Notices R.A.S. 187, 41.
Morrison, L. V. and McBain Sadler, Flora: 1969,Monthly Notices R.A.S. 144, 129 (see p. 139).
Newcomb, S.: 1872, ‘Washington Observations for 1870’. App. III, Washington.
Newcomb, S.: 1882,Astron. Pap. Washington Vol. IV, 147.
Newcomb, S.: 1899,Astron. Pap. Washington Vol. VIII, Part II-1.
Robertson, J.: 1940,Astron. Pap. Washington X, Part II.
Schmeidler, F.: 1979, In ‘Modern Astrometry’. IAU Coll. No. 48, p. 433, Eds. F. V. Prochazka, R. H. Tucker. Univ. Obs. Vienna 1979.
Shaposhnikov, V. G.: 1939,Astron. Zhurn. USSR 16, 3 (p. 62).
Smith, C.: 1979, In ‘Modern Astrometry’. IAU Coll. No. 48, p. 447. Eds. F. V. Prochazka, R. H. Tucker, Univ. Obs. Vienna 1979.
Van Flandern, T. C.: 1971a,Astron. J. 76, 81.
Van Flandern, T. C.: 1971b,Celestial Mechanics 4, 182.
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Fricke, W. On the determination of the equinox and equator of the new fundamental reference coordinate system, the FK5. Celestial Mechanics 22, 113–125 (1980). https://doi.org/10.1007/BF01228796
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DOI: https://doi.org/10.1007/BF01228796