eta Andromedae

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

position, motion, parallax:

position (J2000)	RA: 0h 57min 12.4sec	DEC: +23° 25' 3''
position (B1900)	RA: 0h 51min 51.8sec	DEC: +22° 52' 40''
proper motion (J2000)	RA: -0.044 arcsec/a	DEC: -0.048 arcsec/a
radial velocity	-10 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible
rotational velocity	<17 km/s (uncertain) (variable)
trigonometric parallax	0.009 arcsec
galactic coordinates	longitude: 124.65°	latitude: -39.43°

magnitude

visual magnitude

4.42
(V on UBV Johnson system)

spectral / color information

spectral class	G8IIIb
B-V-magnitude	0.94
U-B-magnitude	0.69
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

double/multiple star system information

separation	131.7 arcsec
mag difference (of double or brightest multiple)	6.9
note	Worley (1978) update of the IDS

note (category: spectroscopic binaries):

115.71d, K 17.9k/s, V0 -10.3k/s, msin3i 0.338, asini 28.5; both components vsini <17k/s.

miscellaneous information

note (category: group membership):

UMa stream.

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

position, motion, parallax:

magnitude:

visual	4.42 (observed)	source: 25
photovisual	4.6	source: 2

spectral information:

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	131.7 arcsec
magnitude difference between brightest and second brightest component	7.1
position angle	232 °

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: 0h 54min 31.887sec	DEC: +23° 8' 53.49''	±0.019 arcsec
position (J2000)	RA: 0h 57min 12.458sec	DEC: +23° 25' 3.87''
proper motion B1950 (FK4)	RA: -0.0025 arcsec/a	DEC: -0.037 arcsec/a	±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0025 arcsec/a	DEC: -0.042 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.6 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	G5
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: 0h 57.2min	DEC: +23° 25'
proper motion (J2000)	RA: -0.044 arcsec/a	DEC: -0.045 arcsec/a

double/multiple star system information:

discoverer information:

discoverer code	discoverer	reference
FOX 116	Fox, P.	-

notes:

note	Eta And. A is a spectroscopic binary, P = 115.7d.

catalogues and names	h And, 38 And, HR 271, HD 5516, SAO 74388, BD +22 153, FK5: 2060, WDS 00572+2325
constellation	Andromeda