b Corvi

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 b Crv, NSV 05729, 9 Crv, HR 4786, HD 109379, SAO 180915, FK5: 471
constellation Corvus

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

note (category: star names): Kraz in Becvar; Allen says unnamed.

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

position, motion, parallax:

position (J2000) RA: 12h 34min 23,2sec DEC: -23° 23' 48''
position (J1900) RA: 12h 29min 7,9sec DEC: -22° 50' 37''
proper motion (J2000) RA: 0,002 arcsec/a DEC: -0,054 arcsec/a
radial velocity -8 km/s
note: variable radial velocity
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,034 arcsec

magnitude

visual magnitude 2,65
(V on UBV Johnson system)

spectral / color information

spectral class G5II
B-V-magnitude 0,89
U-B-magnitude 0,6
R-I-magnitude 0,44

variability information

variable star identification 5729

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

position, motion, parallax:

position (J2000) RA: 12h 34min 23,238sec DEC: -23° 23' 48,31'' ±0,06 arcsec source: 15
proper motion (J2000) RA: 0,0002 arcsec/a DEC: -0,054 arcsec/a source: 25
radial velocity -8 km/s source: 25
trigonometric parallax 0,034 ±0,003 arcsec source: 25
galactic coord. (B1950) longitude: 297,88° latitude: 39,31°
GCI unit vector (J2000) X: -0,907466 Y: -0,13719 Z: -0,397096

magnitude:

visual 2,65 (observed) source: 25
photovisual 2,8 source: 2
photographic 3,6 source: 2

spectral information:

spectral class G5 source: 96
Morgan-Keenan G5IIb source: 25
B-magnitude 3,54 ±0,05 B-V-magnitude 0,89
U-magnitude 4,14 ±0,05 U-B-magnitude 0,6

variability information:

source of data: 28
variability type 9
var. amplitude 0,06

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: 12h 31min 45,342sec DEC: -23° 7' 13,6'' ±0,005 arcsec
position (J2000) RA: 12h 34min 23,241sec DEC: -23° 23' 48,22''
proper motion J1950 (FK4) RA: 0,0001 arcsec/a DEC: -0,058 arcsec/a ±0,001 arcsec/a in RA
±0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0002 arcsec/a DEC: -0,053 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 2,8 (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: 471
Durchmusterung BD-22 3401
Boss General Catalogue 17133
Henry Draper Catalogue 109379

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

position:

position (J1950) RA: 12h 31min 45,3sec DEC: -23° 7' 14''

variability informations:

magnitute at max. brightness 2,6
magnitute at min. brightness 2,66
photometric system visual, photovisual or Johnson's V

spectral information

spectral class G5

references

to a study 290477D (designation: ZI 946)

miscanellous

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