BSC: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)
This is a modified version of the original BSC catalogue. Have a look here.
mysql> describe bsc; +------------+----------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +------------+----------------------+------+-----+---------+-------+ | HR | smallint(4) unsigned | NO | PRI | 0 | | | Name | char(10) | YES | | | | | IRflag | char(1) | YES | | | | | Multiple | char(1) | YES | | | | | ADScomp | char(2) | YES | | | | | VarID | char(9) | YES | | | | | RA | char(10) | YES | | | | | DE | char(9) | YES | | | | | RAd | float(8,4) | NO | PRI | 0.0000 | | | DECd | float(8,4) | NO | PRI | 0.0000 | | | GLON | float(6,2) | NO | | 0.00 | | | GLAT | float(6,2) | NO | | 0.00 | | | Vmag | float(5,2) | NO | | 0.00 | | | BmV | float(5,2) | NO | | 0.00 | | | u_BmV | char(1) | YES | | | | | UmB | float(5,2) | NO | | 0.00 | | | u_UmB | char(1) | YES | | | | | RmI | float(5,2) | NO | | 0.00 | | | n_RmI | char(1) | YES | | | | | SpType | char(20) | YES | | | | | n_SpType | char(1) | YES | | | | | pmRA | float(6,3) | NO | | 0.000 | | | pmDE | float(6,3) | NO | | 0.000 | | | n_Parallax | char(1) | YES | | | | | Parallax | float(6,3) | NO | | 0.000 | | | Dmag | float(4,1) | NO | | 0.0 | | | Sep | float(6,1) | NO | | 0.0 | | | MultID | char(4) | YES | | | | | MultCnt | tinyint(2) | NO | | 0 | | +------------+----------------------+------+-----+---------+-------+ 29 rows in set (0.01 sec)
Fields description
| HR | [1/9110]+ Harvard Revised Number = Bright Star Number | Name | Name, generally Bayer and/or Flamsteed name | IRflag | [I] I if infrared source | Multiple | [AWDIRS] Double or multiple-star code | ADScomp | ADS number components | VarID | Variable star identification | RA | RA in hh:mm:ss.s | DE | Dec in dd:mm:ss | RAd | RA in decimal degrees | DECd | Dec in decimal degrees | GLON | Galactic longitude | GLAT | Galactic latitude | Vmag | Visual magnitude | BmV | B-V color in the UBV system | u_BmV | [ :?] Uncertainty flag on B-V | UmB | U-B color in the UBV system | u_UmB | [ :?] Uncertainty flag on U-B | RmI | R-I in system specified by n_R-I | n_RmI | [CE:?D] Code for R-I system (Cousin, Eggen) | SpType | Spectral type | n_SpType | [evt] Spectral type code | pmRA | Annual proper motion in RA J2000, FK5 system | pmDE | Annual proper motion in Dec J2000, FK5 system | n_Parallax | [D] D indicates a dynamical parallax, otherwise a trigonometric parallax | Parallax | Trigonometric parallax (unless n_Parallax) | Dmag | Magnitude difference of double, or brightest multiple | Sep | Separation of components in Dmag if occultation binary. | MultID | Identifications of components in Dmag | MultCnt | Number of components assigned to a multiple