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 n1Boo, NSV 20324, 52 Boo, HR 5763, HD 138481, SAO 45580, FK5: 573
constellation Bootes

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: 15h 30min 55,8sec DEC: +40 49' 59''
position (J1900) RA: 15h 27min 20,2sec DEC: +41 10' 26''
proper motion (J2000) RA: 0,011 arcsec/a DEC: -0,007 arcsec/a
radial velocity -10 km/s
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,02 arcsec


visual magnitude 5,02
(V on UBV Johnson system)

spectral / color information

spectral class K4.5IIIbBa0.4
B-V-magnitude 1,59
U-B-magnitude 1,9
R-I-magnitude 0,93
note (category: spectra): Also classified M0IIIab and K5.5Ib.

miscellaneous information

note (category: group membership): UMa stream.

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

position, motion, parallax:

position (J2000) RA: 15h 30min 55,762sec DEC: +40 49' 59,03'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,001 arcsec/a DEC: -0,007 arcsec/a source: 25
radial velocity -10 km/s source: 25
trigonometric parallax 0,02 0,002 arcsec source: 25
galactic coord. (B1950) longitude: 66,1 latitude: 54,58
GCI unit vector (J2000) X: -0,458162 Y: -0,602128 Z: 0,653857


visual 5,02 (observed) source: 25
photovisual 5,2 source: 2
photographic 5 source: 16

spectral information:

spectral class K5 source: 96
Morgan-Keenan K4.5IIIbBa0.5 source: 25
B-magnitude 6,61 0,05 B-V-magnitude 1,59
U-magnitude 8,51 0,05 U-B-magnitude 1,9


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
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
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: 15h 29min 7,882sec DEC: +41 0' 9,24'' 0,004 arcsec
position (J2000) RA: 15h 30min 55,763sec DEC: +40 49' 59,07''
proper motion J1950 (FK4) RA: 0,0006 arcsec/a DEC: -0,01 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,001 arcsec/a DEC: -0,007 arcsec/a
source of proper motion data Determined by source catalog


visual 5,1 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class K5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.


source catalogue FK4, catalogue number: 573
Durchmusterung BD+41 2609
Boss General Catalogue 20866
Henry Draper Catalogue 138481