I/143 Fourth Fundamental Cat and Suppl (FK4, FK4S) (Fricke+ 1963)
Fourth Fundamental Catalogue and Supplement
Fricke W., Kopff A.
<Veroeff. Astron. Rechen-Inst., Heidelb., No. 10, 11 (1963)>
=1963VeARI..10....1F 1963VeARI..10....1F
=1963VeARI..11....1F 1963VeARI..11....1F
ADC_Keywords: Positional data ; Proper motions ; Fundamental catalog ;
Stars, fundamental
Description:
The FK4 was an attempt to establish a fundamental system of
stellar positions and proper motions for the 1950 equinox using as
much position data as were available. Most of the stars are
brighter than 7.0 mag. To increase the star density in some
regions of the sky, positions and proper motions for additional
stars were established on the same system. This catalog contains
seven data files, six for different equinoxes (1950, 1955, 1960,
1965, 1970, and 1975) and one for the supplemental stars. The 1950
and 1975 files contain the complete FK4 catalog (1535 stars); the
others contain only 52 polar stars.
In addition to a header record, the primary catalog contains for
each star an identification number; the magnitude (maximum for a
variable star); a variability flag, the minimum magnitude for a
variable or the magnitude of the secondary for a double star; the
HD spectral type and the type for the companion or a second type
for a variable star; the position and the change and acceleration
of the position; the proper motion and its change with time; the
mean epoch of the observations for both right ascension and
declination; the standard deviations of the position and proper
motion; the numbers of the star in the Boss General Catalog, the
N30 catalog, and in the Durchmusterungs; and the parallax. The
supplement has a flag to indicate duplicity but no information
about variability or the second component. It has no information
about the temporal change of the position and proper motion and
does not list the N30 and Durchmusterung numbers. It also omits
the mean epoch for the observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fk4_desc.txt 80 175 Original FK4 catalog description
fk4_1950.dat 186 1535 FK4 full catalog for Equinox and Epoch B1950.0
fk4_1955.dat 186 52 FK4 polar stars for Equinox and Epoch B1955.0
fk4_1960.dat 186 52 FK4 polar stars for Equinox and Epoch B1960.0
fk4_1965.dat 186 52 FK4 polar stars for Equinox and Epoch B1965.0
fk4_1970.dat 186 52 FK4 polar stars for Equinox and Epoch B1970.0
fk4_1975.dat 186 1535 FK4 full catalog for Equinox and Epoch B1975.0
fk4_supp.dat 77 1987 FK4 supplement
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See also:
I/149 : Fifth Fundamental Catalogue (FK5) Part I (Fricke+, 1988)
I/175 : Fifth Fundamental Catalogue (FK5) Extension (Fricke+ 1991)
Byte-by-byte Description of file: fk4_19*.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- FK4 FK4 star number.
6- 10 F5.2 mag mpv Photovisual magnitude.
12 A1 --- var ? If "V", then star is variable.
14- 17 A4 mag mpv2 ? Fainter mag or 2ndary mag in binary (1)
19- 21 A3 --- SpType HD spectral type
23- 26 A4 --- SpType2 Second HD spectral type (2)
28- 29 I2 h RAh RA B1950 (hours)
31- 32 I2 min RAm RA B1950 (minutes)
34- 39 F6.3 s RAs RA B1950 (seconds)
41- 49 F9.3 s/ha CvarRA Centennial variation (RA)
51- 59 F9.3 s/ha2 SvarRA 1/2 the secular variation in RA
61- 68 F8.3 s/ha pmRA Proper motion in RA
70- 76 F7.3 s/ha2 d(pmRA) Centennial variation of pmRA
78- 82 F5.2 a EpRA-1900 Epoch (RA) (3)
84- 89 F6.4 s e_RAs Std dev in RA at mean epoch
91- 95 F5.3 s/ha e_pmRA Std dev in pm in RA, time sec per trop cy.
97 A1 --- DE- Declination sign
99-100 I2 deg DEd Declination B1950 (degrees)
102-103 I2 arcmin DEm Declination B1950 (arc minutes)
105-109 F5.2 arcsec DEs Declination B1950 (arc seconds)
111-118 F8.2 arcsec/ha CvarDE Centennial variation (Declination)
120-127 F8.2 arcsec/ha2 SvarDE 1/2 the secular variation in Dec
129-135 F7.2 arcsec/ha pmDE Proper motion in Dec
137-141 F5.2 arcsec/ha2 d(pmDE) Centennial variation of pmDE
143-147 F5.2 a EpDE-1900 Epoch (Dec) (3)
149-153 F5.3 arcsec e_DEs Std dev in Dec at mean epoch
155-158 F4.2 arcsec/ha e_pmDE Std dev in pm in Dec, arc sec per trop cy.
160-164 I5 --- GC ? GC Catalog number (Cat. I/113)
166-169 I4 --- N30 ? N30 Catalog number (Cat. I/80)
171-180 A10 --- DM Durchmusterung number (4)
182-186 F5.3 arcsec plx ? Parallax of star. Usually blank
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Note (1):
If a range of magnitudes is given in the book, this contains '-' in 10
and the fainter mag. in 11-12 (F2.1). Similarly, if both components of
a double star are catalogued, byte 10 contains '+' and the magnitude
of the secondary is in 15-17 (F3.2). Normally 14-17 are blank.
Note (2):
If both components of a double star are catalogued, byte 23 contains
'+' and 24-26 contain the HD spectral type for the secondary. If the
entry is for a single star whose spectrum varies, byte 23 contains '-'
and 24-26 contain the second spectral type. Normally 23-26 are blank.
Note (3):
The first two digits of the year are omitted. (E.g. 1908.22 = 0822)
Note (4):
Durchmusterung number has form DMSZZNNNNN, where DM='BD', 'CD' or
'CP', and S='+' or '-'. E.g. 'BD+28 4'
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Byte-by-byte Description of file: fk4_supp.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- --- [0293] File identifier: 0293 for this file.
6- 9 I4 --- FK4 FK4Sup star number
11- 15 I5 --- GC Boss GC Catalog number (Cat. I/113)
17- 20 F4.1 mag mpv Photovisual magnitude.
22- 25 A4 --- SpType HD spectral type. (1)
27 A1 --- double [2] Double star indicator ('2'=double)
29- 30 I2 h RAh Right Ascension B1950 (hours)
32- 33 I2 min RAm Right Ascension B1950 (min)
35- 40 F6.3 s RAs Right Ascension B1950 (seconds)
42- 49 F8.3 s/ha pmRA Proper motion in RA, time sec per trop cy
51 A1 --- DE- Declination sign
53- 54 I2 deg DEd Declination B1950.0 (degrees)
56- 57 I2 arcmin DEm Declination B1950.0 (minutes)
59- 63 F5.2 arcsec DEs Declination B1950.0 (seconds)
65- 71 F7.2 arcsec/ha pmDE Proper motion in Dec, arcsec per trop cy.
73- 77 F5.3 arcsec plx ? Parallax, arc seconds.
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Note (1):
Byte 22 is the prefix (blank except for #3505, which is 'c'); 23 is
the class; 24 is the subclass; and 25 is the suffix (usually blank,
but may be 'p' or 'e'). Two stars have type ' Oe5'.
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Historical Notes:
The original machine-readable catalog consisted of seven files broken
down by left and right pages for 1950 and 1975, left and right pages
for the circumpolar stars, and a file for the supplement. The catalog
was supplied to W. M. Owen, Jr. of the Jet Propulsion Laboratory (JPL)
in January of 1989. Modifications to the data and format were made at
JPL to correct miscellaneous errors, convert old BCD coding to ASCII
representation, add Durchmusterung numbers and trigonometric
parallaxes, and combine the left and right pages to single files
containing one logical record per object in a uniform format. The
revised catalog was then returned to the ADC at NASA GSFC, where the
descriptive file (also prepared mostly at JPL) was modified. (The
logical record length of the Supplement file was changed from 80 bytes
to 55 bytes per record at the ADC because bytes 56-80 were blank.) The
revised catalog was then archived permanently.
* on ADC CD-ROM Volume 1 (October 1991), directory /astrom/fk4
* 24-Jul-1997: Added standardized ReadMe.
(End) Vincent Kargatis (SSDOO/ADF) 24-Jul-1997