I/146 Positions and Proper Motions - North (Roeser+, 1988)
Catalogue of Positions and Proper Motions Roeser S., Bastian U. <Astron. Astrophys. Suppl. Ser. 74, 449 (1988)> =1988A&AS...74..449R (SIMBAD/NED BibCode)
ADC_Keywords: Positional data ; Proper motions ; Description: PPM North gives J2000 positions and proper motions of 181731 stars north of -2.5 degrees declination. Its main purpose is to provide a convenient, dense, and accurate net of astrometric reference stars that represents the new IAU (1976) coordinate system on the sky. The mean epoch is near 1931. The average mean errors of the positions and proper motions are 0.27" and 0.43"/cen. On the average six measured positions are available per star; 1064 stars do not have sufficient redundancies to resolve discrepancies. In addition to the positions and proper motions, the PPM (North) contains the BD number, the magnitude, the spectral type, the number of positions included, the mean error of each component of the position and proper motion, the weighted mean epoch in each coordinate, the numbers in the SAO, HD, and AGK3 catalogs, and various standard notes. In addition a number of individual notes are given in the introduction. See file desc.txt for complete explanations provided by the authors. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file desc.txt 80 1145 Authors' description ppm1.dat 133 181731 Catalogue PPM-North ppma1.dat 138 181731 Catalogue in format of old PPM North
Byte-by-byte Description of file: ppm1.dat
Bytes Format Units Label Explanations
2- 7 I6 --- PPM [1/181731]+ PPM Designation 10- 18 A9 --- DM *Durchmusterung, BD or CD 20- 23 F4.1 mag Mag *Magnitude, Visual if Flag5 is 'V' 25- 26 A2 --- Sp *Spectral type 28- 29 I2 h RAh Right Ascension for the Equinox=J2000.0 and Epoch=J2000.0, on the system of FK5 31- 32 I2 min RAm Right Ascension J2000 (minutes) 34- 39 F6.3 s RAs Right Ascension J2000 (seconds) 42 A1 --- DE- Declination J2000 (sign) 43- 44 I2 deg DEd Declination for the equinox and epoch J2000.0, on the system of FK5 46- 47 I2 arcmin DEm Declination J2000 (minutes) 49- 53 F5.2 arcsec DEs Declination J2000 (seconds) 56- 62 F7.4 s/yr pmRA *Proper motion in RA, J2000 64- 69 F6.3 arcsec/yr pmDE *Proper motion in DE, J2000 71- 72 I2 --- Npos *Number of individual positions used 74- 75 I2 10mas e_RAs *Mean error of RA 77- 78 I2 10mas e_DEs *Mean error of DE 80- 83 F4.1 mas/yr e_pmRA *Mean error of pmRA 85- 88 F4.1 mas/yr e_pmDE *Mean error of pmDE 90- 94 F5.2 yr EpRA-1900 *Weighted mean epoch, RA and pmRA 96-100 F5.2 yr EpDE-1900 *Weighted mean epoch, DE and pmDE 102-107 I6 --- SAO [1/258997]? SAO Designation 109-114 I6 --- HD [1/359083]? Henry Draper Designation 117-125 A9 --- AGK3 AGK2/3 I/69 designation 127 A1 --- Flag1 *'P' - problem, 'C' - comment 128 A1 --- Flag2 *'D' - double star 129 A1 --- Flag3 * - not used 130 A1 --- Flag4 *'F' - member of FK5 131 A1 --- Flag5 *'R' - remark, 'V' - V mag (CPC-2)
Note on DM: Designation of the star in the Bonner Durchmusterung (for zones from -02 to -22 degrees) or in the Cordoba Durchmusterung (zones -23 to -89 degrees). Note on Mag and Sp: See chapter 3 of description file. Note on pmRA: Proper motion in right ascension for epoch and equinox J2000.0, on the system of FK5 given in seconds of time per Julian year. Note on pmDE: Proper motion in Declination for epoch and equinox J2000.0, on the system of FK5 given in seconds of arc per Julian year. Note on Npos: Number of individual published positions used for the derivation of the position and proper motion given. Note on e_RAs: Mean error of right ascension at the mean epoch of right ascension EpRA, multiplied by the cosine of declination, given in units of 0.01 seconds of arc. Note on e_DEs: Mean error of declination at the mean epoch of declination EpDE, given in units of 0.01 seconds of arc. Note on e_pmRA: Mean error of the proper motion in right ascension, multiplied by the cosine of declination, given in units of 0.001 seconds of arc per Julian year. Note on e_pmDE: mean error of the proper motion in declination given in units of 0.001 seconds of arc per Julian year Note on EpRA-1900: Weighted mean epoch of the measured positions used for the derivation of RA and pmRA, given in years since 1900.0. Note on EpDE-1900: Weighted mean epoch of the measured positions used for the derivation of DE and pmDE, given in years since 1900.0. Note on Flag1: P - problem case, preferably not to be used as astrometric reference star. C - a critical comment is given in the List of Critical Comments. Not to be used as astrometric reference star. Note on Flag2: D - double star, preferably not to be used as astrometric reference star. Note on Flag3: Not used, void for consistency with PPM (north). Note on Flag4: F - member of FK5, mostly bright stars, original FK5 data are given. Note on Flag5: R - a remark is given in the List of Remarks on Individual Stars. V - the magnitude is a photographic V magnitude copied from CPC-2.
Byte-by-byte Description of file: ppma1.dat
Bytes Format Units Label Explanations
2- 4 A3 --- c3PPM 3 characters 'PPM' 5- 10 I6 --- PPM PPM number 11- 16 F6.1 mag Mag Magnitude 19- 20 A2 --- Sp Spectral type 22 A1 --- Flag1 *Problem flag 24- 38 D15.8 rad RA50 Right ascension for Equinox=B9150 and Epoch=B1950, FK4 system 40- 54 D15.8 rad Dec50 Declination for Equinox=B9150 and Epoch=B1950, FK4 system 56- 67 D12.5 0.01rad/a PMA50 Proper motion in RA in FK4 system, radians/tropical century 69- 80 D12.5 0.01rad/a PMD50 Proper motion in DE in FK4 system, radians/tropical century 82- 96 D15.8 rad R.A. Right ascension for Equinox=B9150 and Epoch=J2000, FK5 system 98-112 D15.8 rad Dec. Declination for Equinox=J2000 and Epoch=J2000, FK5 system 114-125 D12.5 0.01rad/a PMA Proper motion in R.A. in FK5 system, radians/tropical century 127-138 D12.5 0.01rad/a PMD Proper motion in Dec. in FK5 system, radians/tropical century
Note on Flag1: P - problem case, preferably not to be used as astrometric reference star. C - a critical comment is given in the List of Critical Comments. Not to be used as astrometric reference star.
References: Fricke, W., Schwan, H., Lederle, T. (1988): Fifth Fundamental Catalogue (FK5). Part I. The Basic Fundamental Stars. Veroeff. Astron. Rechen-Institut Heidelberg Nr.32. I/149 IAU (1976): IAU Transaction XVI B, Reidel Publ., Dordrecht 1977. Roeser, S., Bastian, U. (1991): PPM Star Catalogue, Astronomisches Rechen-Institut, Heidelberg, Vols. I and II, printed by Spektrum Akademischer Verlag, Heidelberg See also: I/149 : Fifth Fundamental Catalogue (FK5) I/193 : PPM-South Catalogue I/206 : Bright Star Supplement to PPM I/208 : The 90000 stars Supplement to PPM Historical Notes: * The southern part of the SAO Catalogue which was delivered with the original PPM-North catalogue has been removed after publication of the PPM-South (CDS Catalogue I/193). * 19-Jul-1993: First standardized description at CDS (Francois Ochsenbein) * 14-Nov-1994: Description revisited by Gail L. Schneider [NSSDC/ADC]
(End) Gail L. Schneider [NSSDC/ADC] 14-Nov-1994
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|