b2Tucanae


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

  4. The Washington Visual Double Star Catalog, 1996.0


catalogues and names b2Tuc, HR 127, HD 2885, SAO 248202, WDS 00315-6257C
constellation Tucana

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


position, motion, parallax:

position (J2000) RA: 0h 31min 33,6sec DEC: -62 57' 57''
position (J1900) RA: 0h 26min 58,4sec DEC: -63 31' 0''
proper motion (J2000) RA: 0,101 arcsec/a DEC: -0,056 arcsec/a
radial velocity 10 km/s
rotational velocity 50 km/s (uncertain) (variable)
trigonometric parallax 0,03 arcsec
note (category: dynamical parallaxes): 0.020".

magnitude

visual magnitude 4,54
(V on UBV Johnson system)

spectral / color information

spectral class A2V+A7V
B-V-magnitude 0,15
U-B-magnitude 0,03
R-I-magnitude 0,08

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): CD 4.9 A2V, 5.6 A7V, 44.43y, a = 0.385". Combined mag., colors. D-C = 1.17V.

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

position, motion, parallax:

position (J2000) RA: 0h 31min 33,555sec DEC: -62 57' 56,14'' 0,19 arcsec source: 16
proper motion (J2000) RA: 0,0161 arcsec/a DEC: -0,057 arcsec/a source: 25
radial velocity 10 km/s source: 25
trigonometric parallax 0,03 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 306,77 latitude: -54,01
GCI unit vector (J2000) X: 0,450223 Y: 0,062392 Z: -0,890734

magnitude:

visual 4,54 (observed) source: 25
photovisual 4,1 source: 16
photographic 4,5 source: 2

spectral information:

spectral class B9 source: 96
Morgan-Keenan A2V source: 25
B-magnitude 4,69 0,05 B-V-magnitude 0,15
U-magnitude 4,72 0,05 U-B-magnitude 0,03

double/multiple star system information:

source of data: 19
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
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: 0h 29min 16,518sec DEC: -63 14' 27,5'' 0,032 arcsec
position (J2000) RA: 0h 31min 33,571sec DEC: -62 57' 56,53''
proper motion J1950 (FK4) RA: 0,0156 arcsec/a DEC: -0,052 arcsec/a 0,005 arcsec/a in RA
0,005 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0148 arcsec/a DEC: -0,056 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 A2
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: 626
Durchmusterung CP-63 50C
Boss General Catalogue 626
Henry Draper Catalogue 2885

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.