b1Tucanae
| catalogues and names | b1Tuc, HR 126, HD 2884, SAO 248201, WDS 00315-6257A |
| constellation | Tucana |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 0h 31min 32,7sec | DEC: -62° 57' 29'' |
| position (J1900) | RA: 0h 26min 57,7sec | DEC: -63° 30' 33'' |
| proper motion (J2000) | RA: 0,09 arcsec/a | DEC: -0,054 arcsec/a |
| radial velocity | 14 km/s note: spectroscopic binaries |
|
| rotational velocity | 173 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,03 arcsec | |
magnitude
| visual magnitude | 4,37 (V on UBV Johnson system) |
spectral / color information
| spectral class | B9V |
| B-V-magnitude | -0,07 |
| U-B-magnitude | -0,17 |
| R-I-magnitude | -0,07 |
double/multiple star system information
| number of components of multiple star system | 6 |
| separation | 27 arcsec |
| mag difference (of double or brightest multiple) | 0,2 |
| component ID | AC |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | CPM with HR 127 of which both are close binaries. Also CPM with HR 136. Faint companion at 14". |
miscellaneous information
| note (category: group membership): | Pleiades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 0h 31min 32,798sec | DEC: -62° 57' 29,85'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0,0153 arcsec/a | DEC: -0,064 arcsec/a | source: 25 | |
| radial velocity | 14 km/s | source: 25 | ||
| trigonometric parallax | 0,03 | ±0,003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 306,78° | latitude: -54,02° | ||
| GCI unit vector (J2000) | X: 0,450339 | Y: 0,062383 | Z: -0,890676 | |
magnitude:
| visual | 4,37 (observed) | source: 25 |
| photovisual | 3,8 | source: 16 |
| photographic | 4,5 | source: 2 |
spectral information:
| spectral class | B9 | source: 29 | |
| Morgan-Keenan | B9V | source: 25 | |
| B-magnitude | 4,3 ±0,05 | B-V-magnitude | -0,07 |
| U-magnitude | 4,13 ±0,05 | U-B-magnitude | -0,17 |
double/multiple star system information:
| separation between brightest and second brightest component | 2,4 arcsec |
| magnitude difference between brightest and second brightest component | 9,1 |
| position angle | 151 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 4,37 | B9 | b1Tucanae, HR 126, HD 2884, SAO 248201 |
| B | 4,54 | B9 | b2Tucanae, HR 127, HD 2885, SAO 248202 |
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 | |
| 16 | PPM North and PPM South Catalogs and PPM Supplement |
| Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 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 | |
| 29 | SAOJ2000 |
| SAO on FK5 at J2000, 1989 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (J1950) | RA: 0h 29min 15,752sec | DEC: -63° 14' 0,38'' | ±0,017 arcsec |
| position (J2000) | RA: 0h 31min 32,739sec | DEC: -62° 57' 29,31'' | |
| proper motion J1950 (FK4) | RA: 0,014 arcsec/a | DEC: -0,05 arcsec/a | ±0,004 arcsec/a in RA ±0,003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0132 arcsec/a | DEC: -0,054 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B9 |
| 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: 625 |
| Durchmusterung | CP-63 50A |
| Boss General Catalogue | 625 |
| Henry Draper Catalogue | 2884 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 0h 31,5min | DEC: -62° 57' |
| proper motion (J2000) | RA: 0,084 arcsec/a | DEC: -0,058 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 | 1926 | 2 | 151° | 2,4'' | 4,36 | 13,5 | B9V | B 7 |
| AC | 1835 | 26 | 172° | 27'' | 4,36 | - | - | LCL 119 |
| 1990 | 168° | - | ||||||
| CD | 1900 | 50 | ° | '' | 4,8 | 6 | A2V+A7V | I 260 |
discoverer information:
| discoverer code | discoverer | reference |
| B 7 | Bos, W.H. van den | (Bull. Astron. Inst. Neth. 4, 109; 1927.) |
| LCL 119 | Lacaille, N.L. | - |
| I 260 | Innes, R.T.A. | - |
notes:
| note | Beta (1) Tuc. A is a spectroscopic binary. Proper motion of B +089 -048. Beta (1) and Beta (2) Tuc. Beta (2) Tuc. P = 44yr., a = 0.38", motion retrograde. |