V0983 Cen
| catalogues and names | V0983 Cen, 3 Cen, HR 5210, HD 120709, SAO 204916, WDS 13518-3300A |
| constellation | Centaurus |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 13h 51min 49,6sec | DEC: -32° 59' 40'' |
| position (J1900) | RA: 13h 46min 3,1sec | DEC: -32° 29' 53'' |
| proper motion (J2000) | RA: -0,033 arcsec/a | DEC: -0,038 arcsec/a |
| radial velocity | 10 km/s | |
| rotational velocity | 12 km/s (uncertain) (variable) | |
| dynamical parallax | 0,017 arcsec | |
magnitude
| visual magnitude | 4,56 (V on UBV Johnson system) |
spectral / color information
| spectral class | B5IIIp |
| B-V-magnitude | -0,13 |
| U-B-magnitude | -0,6 |
| R-I-magnitude | -0,13 |
| note (category: spectra): | Strong phosphorus. Abnormally weak helium. 3 Cen A shows excess of phosphorus by factor of 100, krypton by 1000, gallium by 10,000, and deficiencies of sulphur and helium. |
double/multiple star system information
| separation | 7,9 arcsec |
| mag difference (of double or brightest multiple) | 1,5 |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Mag. for combined light with HR 5211, 4.32V. Probably not binary. |
miscellaneous information
| note (category: group membership): | Sco-Cen cluster; Sco-Cen stream; member of the local association (Pleiades group); upper Cen group of Sco-Cen assoc.; member of Pleiades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 13h 51min 49,56sec | DEC: -32° 59' 39,4'' | ±0,76 arcsec | source: 18 |
| proper motion (J2000) | RA: -0,0031 arcsec/a | DEC: -0,036 arcsec/a | source: 25 | |
| radial velocity | 10 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 317,29° | latitude: 28,19° | ||
| GCI unit vector (J2000) | X: -0,740849 | Y: -0,393195 | Z: -0,544555 | |
magnitude:
| visual | 4,56 (observed) | source: 25 |
| photovisual | 4,7 | source: 2 |
| photographic | 4,6 | source: 2 |
spectral information:
| spectral class | B5 | source: 96 | |
| Morgan-Keenan | B5IIIp | source: 25 | |
| B-magnitude | 4,43 ±0,05 | B-V-magnitude | -0,13 |
| U-magnitude | 3,83 ±0,05 | U-B-magnitude | -0,6 |
double/multiple star system information:
| separation between brightest and second brightest component | 7,9 arcsec |
| magnitude difference between brightest and second brightest component | 1,5 |
| position angle | 106 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,56 | B5 | 3 Cen, HR 5210, HD 120709, SAO 204916 |
| B | 6,06 | B5 | 3 Cen, HR 5211, HD 120710, SAO 204917 |
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 | |
| 18 | Hipparcos Input Catalog Version 2 Annex |
| Turon, C., et al., "The Hipparcos Input Catalog, Version 2," Centre de Donnees Stellaires Information Bulletin, Vol. 43, p. 5, 1993 | |
| 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: 13h 48min 55,945sec | DEC: -32° 44' 49,54'' | ±0,023 arcsec |
| position (J2000) | RA: 13h 51min 49,58sec | DEC: -32° 59' 39,8'' | |
| proper motion J1950 (FK4) | RA: -0,0027 arcsec/a | DEC: -0,042 arcsec/a | ±0,004 arcsec/a in RA ±0,004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0027 arcsec/a | DEC: -0,038 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,7 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 18724 |
| Durchmusterung | CD-32 9676A |
| Boss General Catalogue | 18724 |
| Henry Draper Catalogue | 120709 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 13h 51,8min | DEC: -33° 0' |
| proper motion (J2000) | RA: -0,033 arcsec/a | DEC: -0,041 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 |
| - | 1783 | 38 | 112° | 8,5'' | 4,56 | 6,06 | B5III B8V | H 101 |
| 1986 | 106° | 7,9'' |
discoverer information:
| discoverer code | discoverer | reference |
| H 101 | Herschel, W. | - |
notes:
| note | H III 101. 3 Cen. |