13 Orionis

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

position, motion, parallax:

position (J2000)	RA: 5h 7min 38.3sec	DEC: +9° 28' 19''
position (B1900)	RA: 5h 2min 9.4sec	DEC: +9° 20' 59''
proper motion (J2000)	RA: -0.003 arcsec/a	DEC: -0.378 arcsec/a
radial velocity	-24 km/s note: suspected variable radial velocity
rotational velocity	=<6 km/s (uncertain) (variable)
trigonometric parallax	0.033 arcsec
galactic coordinates	longitude: 191.77°	latitude: -18°

magnitude

visual magnitude

6.17
(V on UBV Johnson system)

spectral / color information

double/multiple star system information

number of components of multiple star system	3
separation	124 arcsec
mag difference (of double or brightest multiple)	3.8
component ID	AB
note	Worley (1978) update of the IDS

miscellaneous information

note (category: group membership):

Wolf 630 group; Hyades?

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	123.8 arcsec
magnitude difference between brightest and second brightest component	3.9
position angle	267 °

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
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
52	PPMN-HP subset
PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H)
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: 5h 4min 53.779sec	DEC: +9° 24' 44.95''	ą0.019 arcsec
position (J2000)	RA: 5h 7min 38.321sec	DEC: +9° 28' 18.85''
proper motion B1950 (FK4)	RA: -0.0002 arcsec/a	DEC: -0.377 arcsec/a	ą0.003 arcsec/a in RA ą0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0002 arcsec/a	DEC: -0.378 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	6.3 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	G0
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: 5h 7.6min	DEC: +9° 28'
proper motion (J2000)	RA: -0.008 arcsec/a	DEC: -0.386 arcsec/a

double/multiple star system information:

discoverer information:

notes:

note	16 Ori. A is a spectroscopic binary. Proper motion of B +012 -013.

catalogues and names	13 Ori, HR 1662, HD 33021, SAO 112436, BD +9 736, WDS 05076+0928A
constellation	Orion