Secunda Giedi


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


catalogues and names Secunda Giedi, a2Cap, NSV 25080, 6 Cap, HR 7754, HD 192947, SAO 163427, FK5: 761, WDS 20181-1233A
constellation Capricornus

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


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

position, motion, parallax:

position (J2000) RA: 20h 18min 3,3sec DEC: -12 32' 41''
position (J1900) RA: 20h 12min 30,4sec DEC: -12 51' 17''
proper motion (J2000) RA: 0,064 arcsec/a DEC: 0,004 arcsec/a
radial velocity 0 km/s
note: spectroscopic binaries
rotational velocity <17 km/s (uncertain) (variable)
trigonometric parallax 0,034 arcsec

magnitude

visual magnitude 3,57
(V on UBV Johnson system)

spectral / color information

spectral class G8IIIb
B-V-magnitude 0,94
U-B-magnitude 0,69
R-I-magnitude 0,48

double/multiple star system information

number of components of multiple star system 9
separation 377,7 arcsec
mag difference (of double or brightest multiple) 0,4
component ID *
note (category: double and multiple data): IDS notes Alpha1 Cap = HR 7747 (ADS 13632, four components) as one of five components of Alpha2 Cap = HR

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

position, motion, parallax:

position (J2000) RA: 20h 18min 3,262sec DEC: -12 32' 41,43'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0044 arcsec/a DEC: 0,004 arcsec/a source: 25
radial velocity 0 km/s source: 25
trigonometric parallax 0,034 0,003 arcsec source: 25
galactic coord. (B1950) longitude: 31,1 latitude: -24,81
GCI unit vector (J2000) X: 0,553075 Y: -0,80432 Z: -0,217204

magnitude:

visual 3,57 (observed) source: 25
photovisual 3,8 source: 2
photographic 4,6 source: 2

spectral information:

spectral class G5 source: 96
Morgan-Keenan G9III source: 25
B-magnitude 4,51 0,05 B-V-magnitude 0,94
U-magnitude 5,2 0,05 U-B-magnitude 0,69

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 6,6 arcsec
magnitude difference between brightest and second brightest component 7,4
position angle 172

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: 20h 15min 16,878sec DEC: -12 42' 4,49'' 0,004 arcsec
position (J2000) RA: 20h 18min 3,266sec DEC: -12 32' 41,33''
proper motion J1950 (FK4) RA: 0,0042 arcsec/a DEC: 0,005 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0044 arcsec/a DEC: 0,005 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3,8 (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: 761
Durchmusterung BD-12 5685
Boss General Catalogue 28200
Henry Draper Catalogue 192947

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

position and proper motion:

position (J2000) RA: 20h 18,1min DEC: -12 33'
proper motion (J2000) RA: 0,064 arcsec/a DEC: 0,004 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
A-BC 1846 17 144 6,6'' 3,8 11,2 G9III HJ 608
1959 172 -
AD 1879 3 157 154,6'' 3,8 9,5 - AGC 12
AE 1835 10 291 374,3'' 3,8 4,2 - STF 51
1924 - 377,7''
BC 1877 14 240 1,2'' 11,2 11,5 - AGC 12
EF 1830 4 221 44,1'' - - - DA 16
1912 - 45,2''

discoverer information:

discoverer code discoverer reference
HJ 608 Herschel, J. -
AGC 12 - -
STF 51 Struve, F.G.W. (Pulkova Observations 9; 1878.)
DA 16 Dawes, W.R. -

notes:

note Alpha (2) Cap. Alpha (1) and Alpha (2) Cap.