ACDS V10.0 - Wed Jul 17 16:23:19 CEST 2019
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Detailed Description of V/50 :
Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
V/50 Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)
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The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)
Hoffleit D., Warren Jr W.H.
<Astronomical Data Center, NSSDC/ADC (1991)>
=1964BS....C......0H
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ADC_Keywords: Combined data ; Stars, bright
Description (prepared by Wayne H. Warren Jr., 1991 June 28):
The Bright Star Catalogue (BSC) is widely used as a source of
basic astronomical and astrophysical data for stars brighter than
magnitude 6.5. The catalog contains the identifications of
included stars in several other widely-used catalogs, double- and
multiple-star identifications, indication of variability and
variable-star identifiers, equatorial positions for B1900.0 and
J2000.0, galactic coordinates, UBVRI photoelectric photometric
data when they exist, spectral types on the Morgan-Keenan (MK)
classification system, proper motions (J2000.0), parallax,
radial- and rotational-velocity data, and multiple-star
information (number of components, separation, and magnitude
differences) for known nonsingle stars. In addition to the data
file, there is an extensive remarks file that gives more detailed
information on individual entries. This information includes
star names, colors, spectra, variability details, binary
characteristics, radial and rotational velocities for companion
stars, duplicity information, dynamical parallaxes, stellar
dimensions (radii and diameters), polarization, and membership in
stellar groups and clusters. The existence of remarks is flagged
in the main data file.
The BSC contains 9110 objects, of which 9096 are stars (14
objects catalogued in the original compilation of 1908 are novae
or extragalactic objects that have been retained to preserve the
numbering, but most of their data are omitted), while the remarks
section is slightly larger than the main catalog. The present
edition of the compilation includes many new data and the remarks
section has been enlarged considerably.
This preliminary version of the fifth edition of the Bright Star
Catalogue supersedes the published and machine-readable versions
of Hoffleit (1982, Yale University Observatory) and is intended
for use until the final version of this edition is completed. It
has been made available only for dissemination on the
Astronomical Data Center CD ROM.
The brief format description applies to the preliminary version
of the catalog only. The format will change for the final
edition.
Author's addresses:
Dorrit Hoffleit
Department of Astronomy
Yale University
Wayne H. Warren Jr.
ST Systems Corporation
National Space Science Data Center
NASA Goddard Space Flight Center
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× catalog 197 9110 The main part of the Catalogue
× notes 132 9190 Remarks
See also:
V/36 : Supplement to the Bright Star Catalogue (Hoffleit+ 1983)
Byte-by-byte Description of file: catalog
Bytes Format Units Label Explanations
1- 4 I4 --- HR [1/9110]+ Harvard Revised Number
= Bright Star Number
5- 14 A10 --- Name Name, generally Bayer and/or Flamsteed name
15- 25 A11 --- DM Durchmusterung Identification (zone in
bytes 17-19)
26- 31 I6 --- HD [1/225300]? Henry Draper Catalog Number
32- 37 I6 --- SAO [1/258997]? SAO Catalog Number
38- 41 I4 --- FK5 ? FK5 star Number
42 A1 --- IRflag [I] I if infrared source
43 A1 --- r_IRflag *[ ':] Coded reference for infrared source
44 A1 --- Multiple *[AWDIRS] Double or multiple-star code
45- 49 A5 --- ADS Aitken's Double Star Catalog (ADS) designation
50- 51 A2 --- ADScomp ADS number components
52- 60 A9 --- VarID Variable star identification
61- 62 I2 h RAh1900 ?Hours RA, equinox B1900, epoch 1900.0 (1)
63- 64 I2 min RAm1900 ?Minutes RA, equinox B1900, epoch 1900.0 (1)
65- 68 F4.1 s RAs1900 ?Seconds RA, equinox B1900, epoch 1900.0 (1)
69 A1 --- DE-1900 ?Sign Dec, equinox B1900, epoch 1900.0 (1)
70- 71 I2 deg DEd1900 ?Degrees Dec, equinox B1900, epoch 1900.0 (1)
72- 73 I2 arcmin DEm1900 ?Minutes Dec, equinox B1900, epoch 1900.0 (1)
74- 75 I2 arcsec DEs1900 ?Seconds Dec, equinox B1900, epoch 1900.0 (1)
76- 77 I2 h RAh ?Hours RA, equinox J2000, epoch 2000.0 (1)
78- 79 I2 min RAm ?Minutes RA, equinox J2000, epoch 2000.0 (1)
80- 83 F4.1 s RAs ?Seconds RA, equinox J2000, epoch 2000.0 (1)
84 A1 --- DE- ?Sign Dec, equinox J2000, epoch 2000.0 (1)
85- 86 I2 deg DEd ?Degrees Dec, equinox J2000, epoch 2000.0 (1)
87- 88 I2 arcmin DEm ?Minutes Dec, equinox J2000, epoch 2000.0 (1)
89- 90 I2 arcsec DEs ?Seconds Dec, equinox J2000, epoch 2000.0 (1)
91- 96 F6.2 deg GLON ?Galactic longitude (1)
97-102 F6.2 deg GLAT ?Galactic latitude (1)
103-107 F5.2 mag Vmag ?Visual magnitude (1)
108 A1 --- n_Vmag *[ HR] Visual magnitude code
109 A1 --- u_Vmag [ :?] Uncertainty flag on V
110-114 F5.2 mag B-V ? B-V color in the UBV system
115 A1 --- u_B-V [ :?] Uncertainty flag on B-V
116-120 F5.2 mag U-B ? U-B color in the UBV system
121 A1 --- u_U-B [ :?] Uncertainty flag on U-B
122-126 F5.2 mag R-I ? R-I in system specified by n_R-I
127 A1 --- n_R-I [CE:?D] Code for R-I system (Cousin, Eggen)
128-147 A20 --- SpType Spectral type
148 A1 --- n_SpType [evt] Spectral type code
149-154 F6.3 arcsec/yr pmRA *?Annual proper motion in RA J2000, FK5 system
155-160 F6.3 arcsec/yr pmDE ?Annual proper motion in Dec J2000, FK5 system
161 A1 --- n_Parallax [D] D indicates a dynamical parallax,
otherwise a trigonometric parallax
162-166 F5.3 arcsec Parallax ? Trigonometric parallax (unless n_Parallax)
167-170 I4 km/s RadVel ? Heliocentric Radial Velocity
171-174 A4 --- n_RadVel *[V?SB123O ] Radial velocity comments
175-176 A2 --- l_RotVel [<=> ] Rotational velocity limit characters
177-179 I3 km/s RotVel ? Rotational velocity, v sin i
180 A1 --- u_RotVel [ :v] uncertainty and variability flag on
RotVel
181-184 F4.1 mag Dmag ? Magnitude difference of double,
or brightest multiple
185-190 F6.1 arcsec Sep ? Separation of components in Dmag
if occultation binary.
191-194 A4 --- MultID Identifications of components in Dmag
195-196 I2 --- MultCnt ? Number of components assigned to a multiple
197 A1 --- NoteFlag [*] a star indicates that there is a note
(see file notes)
Note (1): These fields are all blanks for stars removed from
the Bright Star Catalogue (see notes).
Note on r_IRflag:
Blank if from NASA merged Infrared Catalogue, Schmitz et al., 1978;
' if from Engles et al. 1982
: if uncertain identification
Note on Multiple:
A = Astrometric binary
D = Duplicity discovered by occultation;
I = Innes, Southern Double Star Catalogue (1927)
R = Rossiter, Michigan Publ. 9, 1955
S = Duplicity discovered by speckle interferometry.
W = Worley (1978) update of the IDS;
Note on n_Vmag:
blank = V on UBV Johnson system;
R = HR magnitudes reduced to the UBV system;
H = original HR magnitude.
Note on pmRA:
As usually assumed, the proper motion in RA is the projected
motion (cos(DE).d(RA)/dt), i.e. the total proper motion is
sqrt(pmRA2+pmDE2)
Note on n_RadVel:
V = variable radial velocity;
V? = suspected variable radial velocity;
SB, SB1, SB2, SB3 = spectroscopic binaries,
single, double or triple lined spectra;
O = orbital data available.
Byte-by-byte Description of file: notes
Bytes Format Units Label Explanations
2- 5 I4 --- HR [1/9110]+= Harvard Revised (HR)
6- 7 I2 --- Count Note counter (sequential for a star)
8- 11 A4 --- Category *[A-Z: ] Remark category abbreviation:
13-132 A120 --- Remark Remarks in free form text
Note on Category: the following abbreviations are used:
C - Colors;
D - Double and multiple stars;
DYN - Dynamical parallaxes;
G - Group membership;
M - Miscellaneous.
N - Star names;
P - Polarization;
R - Stellar radii or diameters;
RV - Radial and/or rotational velocities;
S - Spectra;
SB - Spectroscopic binaries;
VAR - Variability;
The category abbreviation is always followed by a colon (:).
Historical Notes:
* 02-Oct-1993 at CDS (Francois Ochsenbein)
A few corrections have been inserted from the CD-ROM version
"Selected Astronomical Catalogs, Volume 1, 1991, directory
/combined/bsc5 at CDS with the agreement of Wayne H. Warren Jr:
1. The spectral type for HR 6397 is from Walborn and contained octal 032
(control-Z) characters instead of square brackets around the "n".
2. Two remarks have been added for 6985 and 8817
3. Byte 197 (NoteFlag) of "catalog" file corrected for stars
202 7126 7482 7614 8982 (removed asterisk)
285 342 841 843 991 1181 1553 1652 2269 2271 (added asterisk)
2837 3133 3962 4522 4789 6692 7076 7328 8306 8667 (added asterisk)
* 02-Nov-1995 at CDS (Francois Ochsenbein):
Documentation slightly changed to accommodate to standards, and
two lines which were inverted in "notes" have been replaced.
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(End) Francois Ochsenbein [CDS] 02-Nov-1995