Alshain
| catalogues and names | Alshain, b Aql, NSV 12557, 60 Aql, HR 7602, HD 188512, SAO 125235, FK5: 749, WDS 19553+0624A |
| constellation | Aquila |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | ALSHAIN; Alschairn. |
position, motion, parallax:
| position (J2000) | RA: 19h 55min 18,8sec | DEC: +6° 24' 24'' |
| position (J1900) | RA: 19h 50min 24sec | DEC: +6° 9' 25'' |
| proper motion (J2000) | RA: 0,048 arcsec/a | DEC: -0,482 arcsec/a |
| radial velocity | -40 km/s note: variable radial velocity |
|
| rotational velocity | =<16 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,07 arcsec | |
| note (category: dynamical parallaxes): | 0.049". |
magnitude
| visual magnitude | 3,71 (V on UBV Johnson system) |
spectral / color information
| spectral class | G8IV |
| B-V-magnitude | 0,86 |
| U-B-magnitude | 0,48 |
| R-I-magnitude | 0,49 |
variability information
| variable star identification | 12557 |
| note (category: variability): | ADS 13110A, amp. 0.05V. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 175 arcsec |
| mag difference (of double or brightest multiple) | 7,7 |
| component ID | AC |
| note (category: double and multiple data): | AB binary. B 12v dM3 at 13". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 19h 55min 18,799sec | DEC: +6° 24' 24,29'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,0032 arcsec/a | DEC: -0,482 arcsec/a | source: 25 | |
| radial velocity | -40 km/s | source: 25 | ||
| trigonometric parallax | 0,07 | ±0,007 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 46,14° | latitude: -11,09° | ||
| GCI unit vector (J2000) | X: 0,479175 | Y: -0,870597 | Z: 0,111586 | |
magnitude:
| visual | 3,71 (observed) | source: 25 |
| photovisual | 3,9 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | G8IV | source: 25 | |
| B-magnitude | 4,57 ±0,05 | B-V-magnitude | 0,86 |
| U-magnitude | 5,05 ±0,05 | U-B-magnitude | 0,48 |
double/multiple star system information:
| separation between brightest and second brightest component | 12,9 arcsec |
| magnitude difference between brightest and second brightest component | 8,1 |
| position angle | 6 ° |
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: 19h 52min 51,384sec | DEC: +6° 16' 49,84'' | ±0,003 arcsec |
| position (J2000) | RA: 19h 55min 18,797sec | DEC: +6° 24' 24,31'' | |
| proper motion J1950 (FK4) | RA: 0,0029 arcsec/a | DEC: -0,479 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0032 arcsec/a | DEC: -0,481 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 749 |
| Durchmusterung | BD+06 4357 |
| Boss General Catalogue | 27587 |
| Henry Draper Catalogue | 188512 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 19h 55,3min | DEC: +6° 24' |
| proper motion (J2000) | RA: 0,048 arcsec/a | DEC: -0,482 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 |
| AB | 1852 | 24 | 17° | 12,4'' | 3,71 | 11,8 | G8IV | STT 532 |
| 1976 | 6° | 12,9'' | ||||||
| AC | 1879 | 4 | 347° | 151,9'' | 3,9 | 10,5 | - | STT 532 |
| 1925 | 348° | 175'' |
discoverer information:
| discoverer code | discoverer | reference |
| STT 532 | Struve, O. | - |
notes:
| note | Beta Aql. A is variable. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 19h 52min 51,4sec | DEC: +6° 16' 50'' |
variability informations:
| magnitute at max. brightness | 3,68 |
| magnitute at min. brightness | 3,74 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | G8 |
references
| to a study | 140098D (designation: BETA AQL) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |