Algorab
| catalogues and names | Algorab, d Crv, NSV 05656, 7 Crv, HR 4757, HD 108767, SAO 157323, FK5: 465, WDS 12299-1631A |
| other names | Algores, Algoral, Algorel |
| constellation | Corvus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Algorab; Algores; Algoral; Algorel. |
position, motion, parallax:
| position (J2000) | RA: 12h 29min 51,9sec | DEC: -16° 30' 56'' |
| position (J1900) | RA: 12h 24min 41,3sec | DEC: -15° 57' 31'' |
| proper motion (J2000) | RA: -0,21 arcsec/a | DEC: -0,138 arcsec/a |
| radial velocity | 9 km/s note: variable radial velocity |
|
| rotational velocity | 148 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,024 arcsec | |
magnitude
| visual magnitude | 2,95 (V on UBV Johnson system) |
spectral / color information
| spectral class | B9.5V |
| B-V-magnitude | -0,05 |
| U-B-magnitude | -0,09 |
| R-I-magnitude | -0,04 |
| note (category: spectra): | uv indicates dB9.5, CIff. |
variability information
| variable star identification | 5656 |
| note (category: variability): | ADS 8572A. |
double/multiple star system information
| separation | 24,4 arcsec |
| mag difference (of double or brightest multiple) | 5,3 |
| note (category: double and multiple data): | CPM. B is K2Ve, lithium strong. |
miscellaneous information
| note (category: group membership): | Pleiades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 12h 29min 51,855sec | DEC: -16° 30' 55,57'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0,0146 arcsec/a | DEC: -0,138 arcsec/a | source: 25 | |
| radial velocity | 9 km/s | source: 25 | ||
| trigonometric parallax | 0,024 | ±0,002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 295,49° | latitude: 46,05° | ||
| GCI unit vector (J2000) | X: -0,950615 | Y: -0,124578 | Z: -0,284274 | |
magnitude:
| visual | 2,95 (observed) | source: 25 |
| photovisual | 3,1 | source: 2 |
| photographic | 3,1 | source: 2 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | B9.5V | source: 25 | |
| B-magnitude | 2,9 ±0,05 | B-V-magnitude | -0,05 |
| U-magnitude | 2,82 ±0,05 | U-B-magnitude | -0,08 |
variability information:
| variability type | 9 |
| var. amplitude | 0,05 |
double/multiple star system information:
| separation between brightest and second brightest component | 24,1 arcsec |
| magnitude difference between brightest and second brightest component | 5,52 |
| position angle | 214 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 2,95 | A0 | Algorab, d Corvi, 7 Crv, HR 4757, HD 108767, SAO 157323 |
| B | 8,4 | - |
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: 12h 27min 16,38sec | DEC: -16° 14' 14,14'' | ±0,004 arcsec |
| position (J2000) | RA: 12h 29min 51,857sec | DEC: -16° 30' 55,56'' | |
| proper motion J1950 (FK4) | RA: -0,0148 arcsec/a | DEC: -0,143 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0145 arcsec/a | DEC: -0,138 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | A0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 465 |
| Durchmusterung | BD-15 3482 |
| Boss General Catalogue | 17029 |
| Henry Draper Catalogue | 108767 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 12h 29,9min | DEC: -16° 31' |
| proper motion (J2000) | RA: -0,21 arcsec/a | DEC: -0,138 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 |
| - | 1823 | 16 | 214° | 24,1'' | 2,95 | 8,47 | B9.5V | SHJ 145 |
discoverer information:
| discoverer code | discoverer | reference |
| SHJ 145 | South & Herschel | - |
notes:
| note | Delta Crv. B is BD-15@3481. Proper motion of B -206 -129. A may be variable. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 12h 27min 16,4sec | DEC: -16° 14' 14'' |
variability informations:
| magnitute at max. brightness | 2,91 |
| magnitute at min. brightness | 2,96 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B9 |
references
| to a study | 290477D (designation: ZI 940) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |