33 Arietis

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

position, motion, parallax:

position (J2000)	RA: 2h 40min 41.1sec	DEC: +27° 3' 39''
position (B1900)	RA: 2h 34min 50.2sec	DEC: +26° 37' 54''
proper motion (J2000)	RA: 0.067 arcsec/a	DEC: -0.031 arcsec/a
radial velocity	17 km/s note: spectroscopic binaries
rotational velocity	104 km/s (uncertain) (variable)
trigonometric parallax	0.002 arcsec
galactic coordinates	longitude: 151.02°	latitude: -29.79°

magnitude

visual magnitude

5.3
(V on UBV Johnson system)

spectral / color information

double/multiple star system information

separation	28.6 arcsec
mag difference (of double or brightest multiple)	4.2

note (category: double and multiple data):

CPM.

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	28.6 arcsec
magnitude difference between brightest and second brightest component	4.26
position angle	0 °

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
16	PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
17	ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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: 2h 37min 45.345sec	DEC: +26° 50' 50.75''	ą0.018 arcsec
position (J2000)	RA: 2h 40min 41.094sec	DEC: +27° 3' 39''
proper motion B1950 (FK4)	RA: 0.005 arcsec/a	DEC: -0.027 arcsec/a	ą0.003 arcsec/a in RA ą0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.005 arcsec/a	DEC: -0.031 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5.4 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	A2
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

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

position and proper motion:

position (J2000)	RA: 2h 40.7min	DEC: +27° 4'
proper motion (J2000)	RA: 0.064 arcsec/a	DEC: -0.033 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
-	1831	18	0°	28.6''	5.3	9.56	A3V	STF 289

discoverer information:

discoverer code	discoverer	reference
STF 289	Struve, F.G.W.	-

notes:

note	33 Ari. A spectroscopic binary. Proper motion of B +052 -044.

catalogues and names	33 Ari, HR 782, HD 16628, SAO 75510, BD +26 443, WDS 02407+2704
constellation	Aries