Wasat
| catalogues and names | Wasat, d Gem, 55 Gem, HR 2777, HD 56986, SAO 79294, FK5: 279, WDS 07201+2159 |
| other names | Wesat |
| constellation | Gemini |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | Wasat; Wesat. |
position, motion, parallax:
| position (J2000) | RA: 7h 20min 7,4sec | DEC: +21° 58' 56'' |
| position (J1900) | RA: 7h 14min 9sec | DEC: +22° 10' 0'' |
| proper motion (J2000) | RA: -0,026 arcsec/a | DEC: -0,012 arcsec/a |
| radial velocity | 4 km/s note: spectroscopic binaries note: orbital data avaible |
|
| rotational velocity | 111 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,061 arcsec | |
| note (category: dynamical parallaxes): | 0.039". |
magnitude
| visual magnitude | 3,53 (V on UBV Johnson system) |
spectral / color information
| spectral class | F2IV |
| B-V-magnitude | 0,34 |
| U-B-magnitude | 0,04 |
| R-I-magnitude | 0,19 |
| note (category: spectra): | Variously classified A9III, F0IV, F2IV. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 0,2 arcsec |
| mag difference (of double or brightest multiple) | 2 |
| component ID | O |
| note (category: double and multiple data): | AB 3.55 F0IV, 8.18 K3V, 1200y, a = 6.975". Component A is SB, 3.7, 5.7v, sep. 0.2". |
| note (category: spectroscopic binaries): | ADS 5983A, 2238.6d, K 27.1k/s, V0 +4.1k/s, asini 781. SB character has, however, been questioned by occultation data. Unresolved by speckle interferometry 1978.96 and 1983.93. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 7h 20min 7,367sec | DEC: +21° 58' 56,29'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0,0019 arcsec/a | DEC: -0,012 arcsec/a | source: 25 | |
| radial velocity | 4 km/s | source: 25 | ||
| trigonometric parallax | 0,061 | ±0,006 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 195,99° | latitude: 15,89° | ||
| GCI unit vector (J2000) | X: -0,317622 | Y: 0,871206 | Z: 0,37432 | |
magnitude:
| visual | 3,53 (observed) | source: 25 |
| photovisual | 3,5 | source: 2 |
spectral information:
| spectral class | F0 | source: 96 | |
| Morgan-Keenan | F2IV | source: 25 | |
| B-magnitude | 3,87 ±0,05 | B-V-magnitude | 0,34 |
| U-magnitude | 3,91 ±0,05 | U-B-magnitude | 0,04 |
double/multiple star system information:
| separation between brightest and second brightest component | 5,8 arcsec |
| magnitude difference between brightest and second brightest component | 5 |
| position angle | 220 ° |
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: 7h 17min 8,265sec | DEC: +22° 4' 34,08'' | ±0,003 arcsec |
| position (J2000) | RA: 7h 20min 7,366sec | DEC: +21° 58' 56,39'' | |
| proper motion J1950 (FK4) | RA: -0,0018 arcsec/a | DEC: -0,014 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0019 arcsec/a | DEC: -0,011 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | F0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 279 |
| Durchmusterung | BD+22 1645 |
| Boss General Catalogue | 9755 |
| Henry Draper Catalogue | 56986 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 7h 20,1min | DEC: +21° 59' |
| proper motion (J2000) | RA: -0,026 arcsec/a | DEC: -0,012 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 |
| - | 1822 | often | 198° | 7,1'' | 3,5 | 8,5 | A9III | STF1066 |
| 1990 | 220° | 5,8'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF1066 | Struve, F.G.W. | - |
notes:
| note | Delta Gem. A premature orbit has been computed. A is an occultation double, and a long-period spectroscopic binary. |