Kocab

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

  5. Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names Kocab, b UMi, NSV 06846, 7 UMi, HR 5563, HD 131873, SAO 8102, FK5: 550, WDS 14507+7409
other names Kochab, Kochah
constellation Ursa Minor

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

note (category: star names): KOCAB; Kochab; Kochah; with HR 5735 called "Guards of the Pole."

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

position, motion, parallax:

position (J2000) RA: 14h 50min 42,3sec DEC: +74° 9' 20''
position (J1900) RA: 14h 50min 59,5sec DEC: +74° 33' 51''
proper motion (J2000) RA: -0,031 arcsec/a DEC: 0,012 arcsec/a
radial velocity 17 km/s
note: variable radial velocity
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,039 arcsec

magnitude

visual magnitude 2,08
(V on UBV Johnson system)

spectral / color information

spectral class K4-III
B-V-magnitude 1,47
U-B-magnitude 1,78
R-I-magnitude 0,76

variability information

variable star identification 6846

double/multiple star system information

separation 209,1 arcsec
mag difference (of double or brightest multiple) 9,2
note Worley (1978) update of the IDS

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

position, motion, parallax:

position (J2000) RA: 14h 50min 42,346sec DEC: +74° 9' 19,78'' ±0,06 arcsec source: 15
proper motion (J2000) RA: -0,0076 arcsec/a DEC: 0,012 arcsec/a source: 25
radial velocity 17 km/s source: 25
trigonometric parallax 0,039 ±0,004 arcsec source: 25
galactic coord. (B1950) longitude: 112,65° latitude: 40,5°
GCI unit vector (J2000) X: -0,200728 Y: -0,185074 Z: 0,962006

magnitude:

visual 2,08 (observed) source: 25
photovisual 2,2 source: 2

spectral information:

spectral class K5 source: 96
Morgan-Keenan K4-III source: 25
B-magnitude 3,55 ±0,05 B-V-magnitude 1,47
U-magnitude 5,33 ±0,05 U-B-magnitude 1,78

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 209,1 arcsec
magnitude difference between brightest and second brightest component 9,3
position angle 342 °

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
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: 14h 50min 49,645sec DEC: +74° 21' 35,58'' ±0,003 arcsec
position (J2000) RA: 14h 50min 42,375sec DEC: +74° 9' 19,74''
proper motion J1950 (FK4) RA: -0,0086 arcsec/a DEC: 0,01 arcsec/a ±0,001 arcsec/a in RA
±0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0073 arcsec/a DEC: 0,012 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,2 (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.

catalogues

source catalogue FK4, catalogue number: 550
Durchmusterung BD+74 595
Boss General Catalogue 20029
Henry Draper Catalogue 131873

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 14h 50,7min DEC: +74° 9'
proper motion (J2000) RA: -0,031 arcsec/a DEC: 0,012 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
- 1879 2 342° 207,8'' 2,08 11,4 K4III BUP 159
1908 - 209,1''

discoverer information:

discoverer code discoverer reference
BUP 159 - -

notes:

note Beta UMi.

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

position:

position (J1950) RA: 14h 50min 49,6sec DEC: +74° 21' 36''

variability informations:

magnitute at max. brightness 2,02
magnitute at min. brightness 2,08
photometric system visual, photovisual or Johnson's V

spectral information

spectral class K4

references

to a study 2409D (designation: BETA UMI)