Prima Giedi

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.

position, motion, parallax:

position (J2000)	RA: 20h 17min 38,9sec	DEC: -12° 30' 30''
position (2001,17)	RA: 20h 17min 43sec	DEC: -12° 30' 17''
position (B1900)	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
galactic coordinates	longitude: 31,09°	latitude: -24,7°

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

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:

magnitude:

spectral information:

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 (B1950)	RA: 20h 14min 52,647sec	DEC: -12° 39' 51,04''	ą0,006 arcsec
position (2001,17)	RA: 20h 17min 43sec	DEC: -12° 30' 16''	JD: 2451972,95
position (J2000)	RA: 20h 17min 38,868sec	DEC: -12° 30' 29,5''
proper motion B1950 (FK4)	RA: 0,0013 arcsec/a	DEC: 0,002 arcsec/a	ą0,001 arcsec/a in RA ą0,001 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

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:

discoverer information:

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.

catalogues and names	Prima Giedi, a¹Cap, NSV 25076, 5 Cap, HR 7747, HD 192876, SAO 163422, BD -12 5683, FK5: 1527, WDS 20176-1230A
other names	Algiedi Prima
constellation	Capricornus