b Lacertae

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 Lac, 3 Lac, HR 8538, HD 212496, SAO 34395, FK5: 844
constellation Lacerta

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: 22h 23min 33,6sec DEC: +52 13' 45''
position (J1900) RA: 22h 19min 37,5sec DEC: +51 43' 41''
proper motion (J2000) RA: -0,013 arcsec/a DEC: -0,186 arcsec/a
radial velocity -10 km/s
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,021 arcsec


visual magnitude 4,43
(V on UBV Johnson system)

spectral / color information

spectral class G8.5IIIbCa1
B-V-magnitude 1,02
U-B-magnitude 0,77
R-I-magnitude 0,57

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

position, motion, parallax:

position (J2000) RA: 22h 23min 33,623sec DEC: +52 13' 44,6'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0015 arcsec/a DEC: -0,186 arcsec/a source: 25
radial velocity -10 km/s source: 25
trigonometric parallax 0,021 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 101,26 latitude: -4,3
GCI unit vector (J2000) X: 0,559073 Y: -0,250202 Z: 0,790466


visual 4,43 (observed) source: 25
photovisual 4,6 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan G9IIIbCa1 source: 25
B-magnitude 5,45 0,05 B-V-magnitude 1,02
U-magnitude 6,22 0,05 U-B-magnitude 0,77

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 0,2 arcsec
position angle 168


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
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 21min 35,317sec DEC: +51 58' 40,99'' 0,004 arcsec
position (J2000) RA: 22h 23min 33,619sec DEC: +52 13' 44,49''
proper motion J1950 (FK4) RA: -0,0018 arcsec/a DEC: -0,183 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0015 arcsec/a DEC: -0,187 arcsec/a
source of proper motion data Determined by source catalog


visual 4,6 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class K0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 844
Durchmusterung BD+51 3358
Boss General Catalogue 31310
Henry Draper Catalogue 212496