Nekkar


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 Nekkar, b Boo, NSV 06898, 42 Boo, HR 5602, HD 133208, SAO 45337, FK5: 555
other names Merez, Meres
constellation Bootes

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

note (category: star names): Nekkar; Merez; Meres.

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

position, motion, parallax:

position (J2000) RA: 15h 1min 56,8sec DEC: +40 23' 26''
position (J1900) RA: 14h 58min 10,7sec DEC: +40 47' 6''
proper motion (J2000) RA: -0,041 arcsec/a DEC: -0,028 arcsec/a
radial velocity -20 km/s
note: suspected variable radial velocity
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,037 arcsec

magnitude

visual magnitude 3,5
(V on UBV Johnson system)

spectral / color information

spectral class G8IIIaBa0.3Fe-0.5
B-V-magnitude 0,97
U-B-magnitude 0,72
R-I-magnitude 0,44

variability information

variable star identification 6898

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

position, motion, parallax:

position (J2000) RA: 15h 1min 56,757sec DEC: +40 23' 26,1'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0036 arcsec/a DEC: -0,028 arcsec/a source: 25
radial velocity -20 km/s source: 25
trigonometric parallax 0,037 0,004 arcsec source: 25
galactic coord. (B1950) longitude: 67,61 latitude: 60,04
GCI unit vector (J2000) X: -0,533972 Y: -0,543118 Z: 0,647995

magnitude:

visual 3,5 (observed) source: 25
photovisual 3,6 source: 2

spectral information:

spectral class G5 source: 96
Morgan-Keenan G8IIIaFe-0.5 source: 25
B-magnitude 4,47 0,05 B-V-magnitude 0,97
U-magnitude 5,19 0,05 U-B-magnitude 0,72

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: 15h 0min 3,664sec DEC: +40 35' 12,8'' 0,004 arcsec
position (J2000) RA: 15h 1min 56,75sec DEC: +40 23' 26''
proper motion J1950 (FK4) RA: -0,004 arcsec/a DEC: -0,032 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0036 arcsec/a DEC: -0,028 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,6 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class G5
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 555
Durchmusterung BD+40 2840
Boss General Catalogue 20226
Henry Draper Catalogue 133208

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

position:

position (J1950) RA: 15h 0min 3,7sec DEC: +40 35' 13''

variability informations:

magnitute at max. brightness 3,47
magnitute at min. brightness 3,5
photometric system visual, photovisual or Johnson's V

spectral information

spectral class G8

references

to a study 631147D (designation: BETA BOO)