Bellatrix
| catalogues and names | Bellatrix, g Ori, NSV 01972, 24 Ori, HR 1790, HD 35468, SAO 112740, FK5: 201, WDS 05251+0621 |
| other names | Amazon Star, the |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | BELLATRIX; the Amazon Star. |
position, motion, parallax:
| position (J2000) | RA: 5h 25min 7,9sec | DEC: +6° 20' 59'' |
| position (J1900) | RA: 5h 19min 46sec | DEC: +6° 15' 33'' |
| proper motion (J2000) | RA: -0,009 arcsec/a | DEC: -0,014 arcsec/a |
| radial velocity | 18 km/s note: spectroscopic binaries |
|
| rotational velocity | 59 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,029 arcsec | |
| note (category: radial and/or rotational velocities): | Expanding circumstellar shell. AEROBEE evidence for mass ejection up to 1600k/s. |
magnitude
| visual magnitude | 1,64 (V on UBV Johnson system) |
spectral / color information
| spectral class | B2III |
| B-V-magnitude | -0,22 |
| U-B-magnitude | -0,87 |
| R-I-magnitude | -0,22 |
variability information
| variable star identification | 1972 |
double/multiple star system information
| separation | 179 arcsec |
| mag difference (of double or brightest multiple) | 10,5 |
| note | Worley (1978) update of the IDS |
miscellaneous information
| note (category: group membership): | Ori OB1. |
| note (category: stellar radii or diameters): | Diam. = 0.00070 - 0.00072". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 25min 7,857sec | DEC: +6° 20' 58,74'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0,0006 arcsec/a | DEC: -0,014 arcsec/a | source: 25 | |
| radial velocity | 18 km/s | source: 25 | ||
| trigonometric parallax | 0,029 | ±0,003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 196,93° | latitude: -15,95° | ||
| GCI unit vector (J2000) | X: 0,150629 | Y: 0,982385 | Z: 0,110596 | |
magnitude:
| visual | 1,64 (observed) | source: 25 |
| photovisual | 1,7 | source: 2 |
spectral information:
| spectral class | B2 | source: 96 | |
| Morgan-Keenan | B2III | source: 25 | |
| B-magnitude | 1,42 ±0,05 | B-V-magnitude | -0,22 |
| U-magnitude | 0,55 ±0,05 | U-B-magnitude | -0,87 |
double/multiple star system information:
| separation between brightest and second brightest component | 179 arcsec |
| magnitude difference between brightest and second brightest component | 10,6 |
| position angle | 144 ° |
sources:
| 2 | HD and HDE Catalogs |
| Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University | |
| 15 | FK5, FK5 Extension and FK5 Supplement |
| Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991 | |
| 19 | WDS Catalog |
| Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996 | |
| 25 | Bright Star Catalogue, 5th edition |
| Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994 | |
| 96 | SAO or HD/HDE Catalog |
| Reference from Value 1 or Reference from Value 2 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (J1950) | RA: 5h 22min 26,828sec | DEC: +6° 18' 21,71'' | ±0,004 arcsec |
| position (J2000) | RA: 5h 25min 7,855sec | DEC: +6° 20' 58,66'' | |
| proper motion J1950 (FK4) | RA: -0,0008 arcsec/a | DEC: -0,014 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0006 arcsec/a | DEC: -0,015 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 1,7 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | B2 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 201 |
| Durchmusterung | BD+06 919 |
| Boss General Catalogue | 6668 |
| Henry Draper Catalogue | 35468 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 25,1min | DEC: +6° 21' |
| proper motion (J2000) | RA: -0,009 arcsec/a | DEC: -0,014 arcsec/a |
double/multiple star system information:
| component | year | number of measures | position angle | angular separation | magnitude of 1st component | magnitude of 2nd component | spectral class(es) | discoverer code |
| - | 1879 | 2 | 144° | 179'' | 1,64 | 12,2 | B2III | BUP 78 |
discoverer information:
| discoverer code | discoverer | reference |
| BUP 78 | - | - |
notes:
| note | Gamma Ori. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 5h 22min 26,8sec | DEC: +6° 18' 22'' |
variability informations:
| magnitute at max. brightness | 1,59 |
| magnitute at min. brightness | 1,64 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B2 |
references
| to a study | 0832D (designation: GAMMA ORI) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |