Pollux


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 Pollux, b Gem, NSV 03712, 78 Gem, HR 2990, HD 62509, SAO 79666, FK5: 295, WDS 07453+2802A
other names Hercules
constellation Gemini

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

note (category: star names): POLLUX; Hercules.

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

position, motion, parallax:

position (J2000) RA: 7h 45min 18,9sec DEC: +28 1' 34''
position (J1900) RA: 7h 39min 11,8sec DEC: +28 16' 4''
proper motion (J2000) RA: -0,628 arcsec/a DEC: -0,046 arcsec/a
radial velocity 3 km/s
note: variable radial velocity
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,094 arcsec

magnitude

visual magnitude 1,14
(V on UBV Johnson system)

spectral / color information

spectral class K0IIIb
B-V-magnitude 1
U-B-magnitude 0,85
R-I-magnitude 0,5
note (category: spectra): Emission line discovered by COPERNICUS at 1218.4 may be OV probably formed in a corona. Balloon-borne spectrometer revealed pronounced emission of MgII.

variability information

variable star identification 3712
note (category: variability): NSV 3712 is component A, 1.10 - 1.17V, while component E is NSV 3716, 10.5v.

double/multiple star system information

number of components of multiple star system 7
separation 201,1 arcsec
mag difference (of double or brightest multiple) 10,2
component ID AC
note (category: double and multiple data): All the visual companions optical.

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

position, motion, parallax:

position (J2000) RA: 7h 45min 18,946sec DEC: +28 1' 34,26'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0474 arcsec/a DEC: -0,046 arcsec/a source: 25
radial velocity 3 km/s source: 25
trigonometric parallax 0,094 0,009 arcsec source: 25
galactic coord. (B1950) longitude: 192,24 latitude: 23,41
GCI unit vector (J2000) X: -0,391513 Y: 0,79116 Z: 0,469875

magnitude:

visual 1,14 (observed) source: 25
photovisual 1,2 source: 2

spectral information:

spectral class K0 source: 96
Morgan-Keenan K0IIIb source: 25
B-magnitude 2,14 0,05 B-V-magnitude 1
U-magnitude 2,99 0,05 U-B-magnitude 0,85

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 29,6 arcsec
magnitude difference between brightest and second brightest component 12,6
position angle 280

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: 7h 42min 15,517sec DEC: +28 8' 55,11'' 0,003 arcsec
position (J2000) RA: 7h 45min 18,943sec DEC: +28 1' 34,28''
proper motion J1950 (FK4) RA: -0,0474 arcsec/a DEC: -0,051 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0474 arcsec/a DEC: -0,046 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

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

spectral information:

spectral class K0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 295
Durchmusterung BD+28 1463
Boss General Catalogue 10438
Henry Draper Catalogue 62509

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

position and proper motion:

position (J2000) RA: 7h 45,3min DEC: +28 2'
proper motion (J2000) RA: -0,628 arcsec/a DEC: -0,046 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
AB 1880 6 275 41,4'' 1,14 13,7 K0IIIb BU 580
1900 280 29,6''
AC 1781 8 66 116,7'' 1,2 8,9 - H 42
1922 73 201,1''
AE 1879 7 90 206,3'' 1,2 9,7 - BU 580
1924 - 234''
AF 1836 14 74 203,8'' 1,2 10,4 - STF 5
1924 77 258,2''
AG 1904 2 328 170,1'' 1,2 - - BU 580
1924 332 164,5''
CD 1878 7 128 1,4'' 8,9 11,7 - BU 580
1922 135 -
CE 1898 3 146 71,1'' 8,9 9,7 - BU 580
CF 1851 7 90 57,8'' 8,9 10,4 - BU 580

discoverer information:

discoverer code discoverer reference
BU 580 Burnham, S.W. -
H 42 Herschel, W. -
STF 5 Struve, F.G.W. -

notes:

note Beta Gem. Pollux. AC: H VI 42. F is BD+28@1465.

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

position:

position (J1950) RA: 7h 42min 15,5sec DEC: +28 8' 55''

variability informations:

magnitute at max. brightness 1,1
magnitute at min. brightness 1,17
photometric system visual, photovisual or Johnson's V

spectral information

spectral class K0

references

to a study 280421D (designation: BETA GEM)

miscanellous

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