b Trianguli

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 b Tri, NSV 15447, 4 Tri, HR 622, HD 13161, SAO 55306, FK5: 75
constellation Triangulum

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

object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 2h 9min 32,6sec DEC: +34 59' 14''
position (J1900) RA: 2h 3min 35,4sec DEC: +34 30' 52''
proper motion (J2000) RA: 0,15 arcsec/a DEC: -0,04 arcsec/a
radial velocity 10 km/s
note: spectroscopic binaries, double lined spectra
note: orbital data avaible
rotational velocity 76 km/s (uncertain) (variable)
trigonometric parallax 0,022 arcsec


visual magnitude 3
(V on UBV Johnson system)

spectral / color information

spectral class A5III
B-V-magnitude 0,14
U-B-magnitude 0,1
R-I-magnitude 0,08

double/multiple star system information

note (category: spectroscopic binaries): 31.3884d, K 33.3k/s, V0 +15.2k/s, msin3i 1.45, asini 12.2.

miscellaneous information

note (category: group membership): Hyades group.

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

position, motion, parallax:

position (J2000) RA: 2h 9min 32,625sec DEC: +34 59' 14,24'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0122 arcsec/a DEC: -0,04 arcsec/a source: 25
radial velocity 10 km/s source: 25
trigonometric parallax 0,022 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 140,55 latitude: -25,2
GCI unit vector (J2000) X: 0,691848 Y: 0,438822 Z: 0,573395


visual 3 (observed) source: 25
photovisual 3,1 source: 2

spectral information:

spectral class A5 source: 96
Morgan-Keenan A5IV source: 25
B-magnitude 3,14 0,05 B-V-magnitude 0,14
U-magnitude 3,24 0,05 U-B-magnitude 0,1


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: 2h 6min 33,579sec DEC: +34 45' 6,52'' 0,004 arcsec
position (J2000) RA: 2h 9min 32,615sec DEC: +34 59' 14,16''
proper motion J1950 (FK4) RA: 0,012 arcsec/a DEC: -0,037 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0121 arcsec/a DEC: -0,041 arcsec/a
source of proper motion data Determined by source catalog


visual 3,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class A5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 75
Durchmusterung BD+34 381
Boss General Catalogue 2572
Henry Draper Catalogue 13161