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Collocato In Collocato in: http://digilander.libero.it/occultazioni/ I/149A Fifth Fundamental Catalogue (FK5) Part I (Fricke+, 1988) ================================================================================ Fifth Fundamental Catalogue (FK5) Part I Fricke W., Schwan H., Lederle T. (in collaboration with Bastian U., Bien R., Burkhardt G., du Mont B., Hering R., Jaehrling R., Jahreiss H., Roeser S., Schwerdtfeger H.M., Walter H.G.) <Veroeff. Astron. Rechen-Institut Heidelb. No. 32 (1988)> =1988VeARI..32....1F ================================================================================ ADC_Keywords: Proper motions ; Positional data Abstract: The Basic Fifth Fundamental Catalogue (FK5) Part I provides improved mean positions and proper motions for the 1535 classical fundamental stars that had been included in the FK3 and FK4 catalogs. The machine version of the catalog contains the positions and proper motions of the Basic FK5 stars for the epochs and equinoxes J2000.0 and B1950.0, the mean epochs of individual observed right ascensions and declinations used to determine the final positions, the mean errors of the final positions and proper motions for the reported epochs, and ancillary data such as magnitudes, spectral types, parallaxes, radial velocities, and cross identifications to other catalog designations. Introduction: The Basic FK5 is the successor to the FK4 (Fricke & Kopff 1963) and contains the 1535 classical fundamental stars used to define the latter system. It represents a revision of the FK4 and results from the determination of systematic and individual corrections to the mean positions and proper motions of the FK4, the elimination of the error in the FK4 equinox, and the introduction of the IAU (1976) system of astronomical constants. About 300 catalogs providing star positions obtained from throughout the world are included in the FK5. This document should be used only to supplement the information contained in the source reference. The latter should be consulted for more detailed information regarding the motivation for construction of the FK5, the determination of its equator and equinox, the expressions for general precession, a discussion of the FK5 system, systematic differences between the FK4 and FK5, the transformation of observational catalogs to the FK5 system and to the reference system J2000.0, and more thorough descriptions of the data contained in the FK5 catalog. 1 File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file catalog 190 1535 The FK5 catalog -------------------------------------------------------------------------------- See also: I/175 : FK5, Part II (Extension). Byte-by-byte description of the file: catalog -------------------------------------------------------------------------------- Bytes Format Units Labels Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- FK5 *[1/1670]+ FK5 number 6- 7 I2 h RAh Right ascension, hours, Equinox=J2000, Epoch=J2000 9- 10 I2 min RAm Right ascension minutes (J2000.0) 12- 17 F6.3 s RAs *Right ascension seconds (J2000.0) 19- 25 F7.3 s/ha pmRA Proper motion in RA (J2000.0) 27 A1 --- DE- Sign of declination (Dec) (J2000.0) 28- 29 I2 deg DEd Declination degrees (J2000.0) 31- 32 I2 arcmin DEm Declination arcminutes (J2000.0) 34- 38 F5.2 arcsec DEs *Declination arcseconds (J2000.0) 40- 46 F7.2 arcsec/ha pmDE Proper motion in DE (J2000.0) 48- 49 I2 h RA1950h Right ascension, hours Equinox=B1950, Epoch=B1950 51- 52 I2 min RA1950m Right ascension minutes (B1950.0) 54- 59 F6.3 s RA1950s *Right ascension seconds (B1950.0) 61- 67 F7.3 s/ha pmRA1950 Proper motion in RA (B1950.0) 69 A1 --- DE1950- Sign of declination (B1950.0) 70- 71 I2 deg DE1950d Declination degrees (B1950.0) 73- 74 I2 arcmin DE1950m Declination arcminutes (B1950.0) 76- 80 F5.2 arcsec DE1950s *Declination arcseconds (B1950.0) 82- 88 F7.2 arcsec/ha pmDE1950 Proper motion in DE (B1950.0) 90- 94 F5.2 a EpRA-1900 *Mean Epoch of observed RA 96- 99 F4.1 ms e_RAs *Mean error in RA 101-105 F5.1 ms/ha e_pmRA Mean error in pmRA 107-111 F5.2 a EpDE-1900 *Mean Epoch of observed DE 113-116 F4.1 carcsec e_DEs *Mean error in Declination 118-122 F5.1 carcsec/ha e_pmDE Mean error in pmDE 124-128 F5.2 mag Vmag *V magnitude 129 A1 --- n_Vmag *[VvD] Magnitude flag 131-137 A7 --- SpType *Spectral type(s) 139-144 F6.3 arcsec plx *?Parallax 147-152 F6.1 km/s RV *?Radial velocity 155-159 A5 --- AGK3R AGK3R number (Catalog <I/72>) 2 161-165 A5 --- SRS SRS number (Catalog <I/138>) 167-172 A6 --- HD HD number (Catalog <III/135>) 174-183 A10 --- DM *DM identifier 186-190 A5 --- GC GC number (Catalog <I/113>) -------------------------------------------------------------------------------- Note on FK5: These numbers have remained the same from the FK3 and FK4 (Catalog <I/15>). The user should note that the file is ordered by FK5 number, which means that the stars are arranged neither by right ascension nor by declination. Note on RAs, RA1950s, DEs, DE1950s: The B1950.0 data have been computed from the J2000.0 data using a procedure described in the source reference (Fricke et al. 1988) based on the IAU (1976) system of astronomical constants (see also Lieske 1979), with elimination of the terms of elliptic aberration. These positions are therefore expressed in the new system, for epoch and equinox B1950.0 Note on EpRA-1900, EpDE-1900: Mean epoch (-1900.0) of the individual observed right ascensions and declinations. Note on e_RAs and e_DEs: The mean errors of the positions at the mean epoch and of the corresponding proper-motion components, as obtained from the solution of the normal equations within the derivations of individual positions and proper motions. (These mean errors do not include those of the FK5 system and of the equinox and equator.) Note on Vmag: Photoelectric magnitudes on the UBV system, as taken from the catalogs of Nicolet (1975, 1978). Variability is indicated by a flag in byte 129. For physical double stars, the magnitudes of the brighter components are given (both are given in the published catalog). Note on n_Vmag: Where magnitude ranges are given in the published catalog, the brighter magnitude is given and byte 129 contains an upper case "V". A lower case "v" is present if there is variability and that letter is present in the published catalog (amplitude exceeds 0.3mag). A "D" code indicates that the magnitudes of two close components are given as a footnote in the published catalog. Only the first of the two is contained in the magnitude field of the machine-readable catalog. Note on SpType: A one-dimensional spectral type taken from the FK4 catalog. These types are from the Henry Draper Catalogue (Cannon & Pickering 1918-24). For binary and multiple systems where spectral types are known for more than one component, a second spectral type may be given following a plus sign. Note on plx: Trigonometric parallax if known (blank otherwise). These data are taken from a preliminary version of the new Yale parallax catalog 3 (van Altena, Lee, & Hoffleit, in preparation). Negative parallaxes present in the Yale catalog have been omitted here because they are of no use in computing apparent places from the mean positions. Note on RV: Radial Velocity if known (blank otherwise) Note on DM: the prefixes are BD: Bonner Durchmusterung (Argelander 1859-62, Kuestner 1903 <I/122>) SD: Southern Durchmusterung (Schoenfeld 1886 <I/119>) CD: Cordoba Durchmusterung (Thome 1892- 1932 <I/114>) CP: Cape Photographic Durchmusterung (Gill and Kapteyn 1895-1900 <I/108>) -------------------------------------------------------------------------------- History: The following format changes were made by W. H. Warren Jr. (with Dr. Schwan's concurrence): The DM identifiers, which were single-digit numerical codes, were changed to the literal codes. Plus signs were added to the trigonometric-parallax data, even though no negative parallaxes are included in the catalog, to indicate that negative parallaxes are possible. Multiple blanks between data fields were removed, as were blanks beyond the end of each record, to decrease the logical record length from 220 bytes to 190 bytes. Acknowledgments: Dr. H. Schwan kindly supplied the original and revised versions of the on magnetic tape and colleagues at the Astronomisches Rechen-Institut generously reviewed a draft copy of the original documentation prior to its final release for distribution with machine-readable copies of the catalog, and Dr. Schwan returned comments and corrections. Appreciation is expressed to Dr. William M. Owen Jr. of JPL for supplying the machine-readable FK4, DM cross index that was used to insert DM numbers into the original version of the FK5 catalog. References: Argelander, F. W. A. 1859-62, Bonner Sternverzeichniss, erste bis dritte Sektion, Astronomischen Beobachtungen auf der Sternwarte der Koeniglichen Rhein., Friedrich-Wilhelms-Universitaet zu Bonn, Baende 3-5 (Catalog <I/122>) Boss, B. 1937, General Catalogue of 33342 Stars for the Epoch 1950, Carnegie Institution of Washington Pub. 468 (Washington, Carnegie Institution of Washington) (Catalog <I/113>) Cannon, A. J., & Pickering, E. C. 1918-24, The Henry Draper Catalogue, Ann. Astron. Obs. Harvard College, 91-99 (Catalog <III/135>) Corbin, T. E. 1978, in IAU Colloquium 48, Modern Astrometry, ed. F. V. Prochazka & R. H. Tucker (Vienna, University Obs.), p. 505 (Catalog
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