mu Aquarii

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

position, motion, parallax:

position (J2000)	RA: 20h 52min 39.2sec	DEC: -8° 59' 0''
position (B1900)	RA: 20h 47min 15.6sec	DEC: -9° 21' 31''
proper motion (J2000)	RA: 0.044 arcsec/a	DEC: -0.03 arcsec/a
radial velocity	-9 km/s note: spectroscopic binaries note: orbital data avaible
rotational velocity	46 km/s (uncertain) (variable)
trigonometric parallax	0.019 arcsec
galactic coordinates	longitude: 38.84°	latitude: -30.98°

magnitude

visual magnitude

4.73
(V on UBV Johnson system)

spectral / color information

double/multiple star system information

note (category: spectroscopic binaries):

1782d, K 5.4k/s, V0 -11.4k/s, asini 128.

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	0.1 arcsec
position angle	136 °

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 49min 57.474sec	DEC: -9° 10' 19.76''	±0.004 arcsec
position (J2000)	RA: 20h 52min 39.238sec	DEC: -8° 58' 59.88''
proper motion B1950 (FK4)	RA: 0.0028 arcsec/a	DEC: -0.028 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.003 arcsec/a	DEC: -0.03 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.8 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	A3
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 52.7min	DEC: -8° 59'
proper motion (J2000)	RA: 0.044 arcsec/a	DEC: -0.03 arcsec/a

double/multiple star system information:

discoverer information:

discoverer code	discoverer	reference
MCA 64	McAlister, H.A.	-

notes:

note	Mu Aqr. A long-period spectroscopic binary, P = 1782d. now resolved by speckle interferometry.

catalogues and names	m Aqr, 6 Aqr, HR 7990, HD 198743, SAO 144895, BD -9 5598, FK5: 1547, WDS 20527-0859
constellation	Aquarius