d Tucanae
catalogues and names | d Tuc, NSV 14158, HR 8540, HD 212581, SAO 255222, WDS 22273-6458 |
constellation | Tucana |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
position (J2000) | RA: 22h 27min 20sec | DEC: -64° 57' 59'' |
position (J1900) | RA: 22h 20min 13,4sec | DEC: -65° 28' 30'' |
proper motion (J2000) | RA: 0,071 arcsec/a | DEC: 0,003 arcsec/a |
radial velocity | 12 km/s | |
rotational velocity | 245 km/s (uncertain) (variable) |
magnitude
visual magnitude | 4,48 (V on UBV Johnson system) |
spectral / color information
spectral class | B9.5V |
B-V-magnitude | -0,03 |
U-B-magnitude | -0,07 |
variability information
variable star identification | 14158 |
double/multiple star system information
separation | 6,9 arcsec |
mag difference (of double or brightest multiple) | 4,5 |
note | Worley (1978) update of the IDS |
note (category: double and multiple data): | CPM companion F5III, optical. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
position (J2000) | RA: 22h 27min 19,866sec | DEC: -64° 57' 58,62'' | ±0,19 arcsec | source: 16 |
proper motion (J2000) | RA: 0,0106 arcsec/a | DEC: 0,014 arcsec/a | source: 25 | |
radial velocity | 12 km/s | source: 25 | ||
galactic coord. (B1950) | longitude: 323,87° | latitude: -45,87° | ||
GCI unit vector (J2000) | X: 0,389029 | Y: -0,166475 | Z: -0,906059 |
magnitude:
visual | 4,48 (observed) | source: 25 |
photovisual | 4,2 | source: 16 |
photographic | 4,8 | source: 2 |
spectral information:
spectral class | B9 | source: 96 | |
Morgan-Keenan | B9.5V | source: 25 | |
B-magnitude | 4,45 ±0,05 | B-V-magnitude | -0,03 |
U-magnitude | 4,38 ±0,05 | U-B-magnitude | -0,07 |
variability information:
variability type | 9 |
var. amplitude | 0,04 |
double/multiple star system information:
separation between brightest and second brightest component | 0 arcsec |
position angle | 251 ° |
component | magnitude | spectral class | catalogue(s)/name(s) |
A | 4,48 | B9 | d Tucanae, HR 8540, HD 212581, SAO 255222 |
B | 4,2 | - |
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 | |
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: 22h 23min 48,047sec | DEC: -65° 13' 18,17'' | ±0,016 arcsec |
position (J2000) | RA: 22h 27min 20,002sec | DEC: -64° 57' 59,31'' | |
proper motion J1950 (FK4) | RA: 0,0124 arcsec/a | DEC: 0,005 arcsec/a | ±0,003 arcsec/a in RA ±0,003 arcsec/a in DEC |
proper motion J2000 (FK5) | RA: 0,0112 arcsec/a | DEC: 0,003 arcsec/a | |
source of proper motion data | Determined by source catalog |
magnitude:
visual | 4,8 (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: 31346 |
Durchmusterung | CP-65 4044A |
Boss General Catalogue | 31346 |
Henry Draper Catalogue | 212581 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
position (J2000) | RA: 22h 27,3min | DEC: -64° 58' |
proper motion (J2000) | RA: 0,06 arcsec/a | DEC: 0,009 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 |
Aa | 1992 | 1 | 251° | 0'' | 4,48 | - | B9.5V | CHR 188 |
Aa-B | 1836 | 8 | 282° | 6,9'' | 4,8 | 9,3 | - | HJ 5334 |
discoverer information:
discoverer code | discoverer | reference |
CHR 188 | - | - |
HJ 5334 | Herschel, J. | - |
notes:
note | Delta Tuc. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
position (J1950) | RA: 22h 23min 48sec | DEC: -65° 13' 18'' |
variability informations:
magnitute at max. brightness | 4,46 |
magnitute at min. brightness | 4,5 |
photometric system | visual, photovisual or Johnson's V |
spectral information
spectral class | B8 |
references
to a study | 752781D (designation: HD 212581) |
miscanellous
There are notes in the published catalog (Kukarkin et al.(1982)). |