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I/146 Positions and Proper Motions - North (Roeser+, 1988)
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Catalogue of Positions and Proper Motions
Roeser S., Bastian U.
<Astron. Astrophys. Suppl. Ser. 74, 449 (1988)>
=1988A&AS...74..449R (SIMBAD/NED BibCode)
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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 descrip.doc for complete explanations provided by the authors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
descrip.doc 80 1145 Authors' description
ppmnorth.dat 133 181731 Catalogue PPM-North
ppmnofmt.dat 138 181731 Catalogue in format of old PPM North
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See also:
I/149A : Fifth Fundamental Catalogue (FK5)
I/193 : PPM-South Catalogue
I/206 : Bright Star Supplement to PPM
I/208 : The 90000 stars Supplement to PPM
Byte-by-byte Description of file: ppmnorth.dat
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Bytes Format Units Label Explanations
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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_DEd *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)
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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_DEd:
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: ppmnofmt.dat
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Bytes Format Units Label Explanations
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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=B1950 and
Epoch=B1950, FK4 system
40- 54 D15.8 rad Dec50 Declination for Equinox=B1950 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=J2000 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
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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.
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]
References:
"Fifth fundamental catalogue (FK5). Part 1: The basic fundamental stars",
Fricke, W., Schwan, H., Lederle, T., Bastian, U., Bien, R., Burkhardt, G.,
Du Mont, B., Hering, R., Jahrling, R., Jahreiss, H., Roser, S.,
Schwerdtfeger, H.-M., and Walter, H. G. 1988, Veroeffentlichungen des
Astronomishen Rechen-Instituts Heidelberg, 32, 1 =1988VeARI..32....1F
IAU (1976): IAU Transaction XVI B, Reidel Publ., Dordrecht 1977.
"PPM star catalogue : positions and proper motions of 181731 stars north of
-2.5 degrees declination for equinox and epoch : J2000.0", Roser, Siegfried
and Bastian, Ulrich 1991, Heidelberg ; New York : Published for
Astronomisches Rechen-Institut by Spektrum Akademischer Verlag,
c1991=1991QB6.R66........
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(End) Gail L. Schneider [NSSDC/ADC] 14-Nov-1994