Alkaid


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. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names Alkaid, h UMa, NSV 06450, 85 UMa, HR 5191, HD 120315, SAO 44752, FK5: 509
other names Benetnash, Benetnasch, Elkeid
constellation Ursa Major

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

note (category: star names): ALKAID; Benetnash; Benetnasch; Elkeid.

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

position, motion, parallax:

position (J2000) RA: 13h 47min 32,4sec DEC: +49 18' 48''
position (J1900) RA: 13h 43min 36sec DEC: +49 48' 45''
proper motion (J2000) RA: -0,122 arcsec/a DEC: -0,011 arcsec/a
radial velocity -11 km/s
note: spectroscopic binaries
rotational velocity 205 km/s (uncertain) (variable)
trigonometric parallax 0,035 arcsec

magnitude

visual magnitude 1,86
(V on UBV Johnson system)

spectral / color information

spectral class B3V
B-V-magnitude -0,19
U-B-magnitude -0,67
R-I-magnitude -0,18
note (category: spectra): Lyman alpha observed from COPERNICUS.
note (category: colors): Color excess E(B-V) = +0.02.

variability information

variable star identification 6450

miscellaneous information

note (category: group membership): Cas-Tau OB1; member of Pleiades group.

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

position, motion, parallax:

position (J2000) RA: 13h 47min 32,434sec DEC: +49 18' 47,95'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0125 arcsec/a DEC: -0,011 arcsec/a source: 25
radial velocity -11 km/s source: 25
trigonometric parallax 0,035 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 100,68 latitude: 65,32
GCI unit vector (J2000) X: -0,581459 Y: -0,294802 Z: 0,758286

magnitude:

visual 1,86 (observed) source: 25
photovisual 1,9 source: 2

spectral information:

spectral class B3 source: 96
Morgan-Keenan B3V source: 25
B-magnitude 1,67 0,05 B-V-magnitude -0,19
U-magnitude 1 0,05 U-B-magnitude -0,67

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
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: 13h 45min 34,294sec DEC: +49 33' 44,13'' 0,003 arcsec
position (J2000) RA: 13h 47min 32,44sec DEC: +49 18' 48,06''
proper motion J1950 (FK4) RA: -0,0129 arcsec/a DEC: -0,014 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0124 arcsec/a DEC: -0,01 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 1,9 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class B3
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 509
Durchmusterung BD+50 2027
Boss General Catalogue 18643
Henry Draper Catalogue 120315

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (J1950) RA: 13h 45min 34,3sec DEC: +49 33' 44''

variability informations:

magnitute at max. brightness 1,83
magnitute at min. brightness 1,89
photometric system visual, photovisual or Johnson's V

spectral information

spectral class B3

references

to a study 290477D (designation: ZI 1023)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).