b1Tucanae


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 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:

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
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.