a Tucanae

The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

catalogues and names a Tuc, HR 8502, HD 211416, SAO 255193, FK5: 841
constellation Tucana

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)

position, motion, parallax:

position (J2000) RA: 22h 18min 30,1sec DEC: -60 15' 35''
position (J1900) RA: 22h 11min 39,2sec DEC: -60 45' 29''
proper motion (J2000) RA: -0,072 arcsec/a DEC: -0,043 arcsec/a
radial velocity 42 km/s
note: spectroscopic binaries
note: orbital data avaible
trigonometric parallax 0,026 arcsec


visual magnitude 2,86
(V on UBV Johnson system)

spectral / color information

spectral class K3III
B-V-magnitude 1,39
U-B-magnitude 1,54
R-I-magnitude 0,73

double/multiple star system information

separation 0,1 arcsec
note astrometric binary
note (category: double and multiple data): A* 2.85 K3III, 11.5y, a = 0.049".
note (category: spectroscopic binaries): 4197.7d, K 7.2k/s, V0 +42.2k/s, asini 383.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000) RA: 22h 18min 30,099sec DEC: -60 15' 34,59'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0097 arcsec/a DEC: -0,043 arcsec/a source: 25
radial velocity 42 km/s source: 25
trigonometric parallax 0,026 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 330,22 latitude: -47,96
GCI unit vector (J2000) X: 0,448213 Y: -0,212584 Z: -0,868282


visual 2,86 (observed) source: 25
photovisual 2,9 source: 2
photographic 4 source: 2

spectral information:

spectral class K2 source: 96
Morgan-Keenan K3III source: 25
B-magnitude 4,25 0,05 B-V-magnitude 1,39
U-magnitude 5,79 0,05 U-B-magnitude 1,54

double/multiple star system information:

source of data: 25
separation between brightest and second brightest component 0,1 arcsec


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
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 15min 5,69sec DEC: -60 30' 35,03'' 0,009 arcsec
position (J2000) RA: 22h 18min 30,192sec DEC: -60 15' 34,53''
proper motion J1950 (FK4) RA: -0,008 arcsec/a DEC: -0,039 arcsec/a 0,002 arcsec/a in RA
0,002 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0086 arcsec/a DEC: -0,043 arcsec/a
source of proper motion data Determined by source catalog


visual 2,9 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class K2
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 841
Durchmusterung CP-60 7561
Boss General Catalogue 31183
Henry Draper Catalogue 211416