Prima 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 Prima Giedi, a1Cap, NSV 25076, 5 Cap, HR 7747, HD 192876, SAO 163422, FK5: 1527, WDS 20176-1230A
other names Algiedi Prima
constellation Capricornus

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

note (category: star names): Prima Giedi; Algiedi Prima; Algedi with HR 7754.

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

position, motion, parallax:

position (J2000) RA: 20h 17min 38,9sec DEC: -12 30' 30''
position (J1900) RA: 20h 12min 6,3sec DEC: -12 49' 2''
proper motion (J2000) RA: 0,023 arcsec/a DEC: 0,001 arcsec/a
radial velocity -26 km/s
note: spectroscopic binaries
rotational velocity =<54 km/s (uncertain) (variable)
trigonometric parallax 0,006 arcsec

magnitude

visual magnitude 4,24
(V on UBV Johnson system)

spectral / color information

spectral class G3Ib
B-V-magnitude 1,07
U-B-magnitude 0,78
R-I-magnitude 0,53

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): See note for HR 7754. ADS 13632B, 14v at 44"; C, 9.6v K5III, at 45" physical, vsini =<54k/s. D, 14.3v at 29" from C.

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

position, motion, parallax:

position (J2000) RA: 20h 17min 38,871sec DEC: -12 30' 29,5'' 0,06 arcsec source: 15
proper motion (J2000) RA: 0,0015 arcsec/a DEC: 0,001 arcsec/a source: 25
radial velocity -26 km/s source: 25
trigonometric parallax 0,006 0,001 arcsec source: 25
galactic coord. (B1950) longitude: 31,1 latitude: -24,7
GCI unit vector (J2000) X: 0,551726 Y: -0,805414 Z: -0,216579

magnitude:

visual 4,24 (observed) source: 25
photovisual 4,6 source: 2
photographic 5,1 source: 2

spectral information:

spectral class G0 source: 96
Morgan-Keenan G3Ib source: 25
B-magnitude 5,31 0,05 B-V-magnitude 1,07
U-magnitude 6,09 0,05 U-B-magnitude 0,78

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 44,3 arcsec
magnitude difference between brightest and second brightest component 9,9
position angle 182

component magnitude spectral class catalogue(s)/name(s)
A 4,24 G0 Prima Giedi, a1Capricorni, 5 Cap, HR 7747, HD 192876, SAO 163422
B 9 -

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 14min 52,647sec DEC: -12 39' 51,04'' 0,006 arcsec
position (J2000) RA: 20h 17min 38,868sec DEC: -12 30' 29,5''
proper motion J1950 (FK4) RA: 0,0013 arcsec/a DEC: 0,002 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: 0,0015 arcsec/a DEC: 0,001 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,5 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class G0p
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 1527
Durchmusterung BD-12 5683
Boss General Catalogue 28189
Henry Draper Catalogue 192876

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

position and proper motion:

position (J2000) RA: 20h 17,6min DEC: -12 30'
proper motion (J2000) RA: 0,023 arcsec/a DEC: 0,001 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 1891 4 182 43,5'' 4,24 14,1 G2I BU 295
1960 - 44,3''
AC 1830 10 220 44,1'' 4,24 9,6 - HJ 607
1932 221 45,4''
CD 1905 1 110 29,3'' 9,6 14,2 - WZ 15

discoverer information:

discoverer code discoverer reference
BU 295 Burnham, S.W. -
HJ 607 Herschel, J. -
WZ 15 Wirtz, C. -

notes:

note Alpha (1) Cap. A is a spectroscopic binary. Wilson measures a star nearby: 1882.62, 96.3@, 8.32", 9.0-9.5. Not found by Burnham in 1902.