phi 1 Orionis

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

position, motion, parallax:

position (J2000)	RA: 5h 34min 49.2sec	DEC: +9° 29' 22''
position (B1900)	RA: 5h 29min 19.8sec	DEC: +9° 25' 19''
proper motion (J2000)	RA: 0.002 arcsec/a	DEC: -0.004 arcsec/a
radial velocity	33 km/s note: spectroscopic binaries note: orbital data avaible
rotational velocity	39 km/s (uncertain) (variable)
galactic coordinates	longitude: 195.4°	latitude: -12.29°

magnitude

visual magnitude

4.41
(V on UBV Johnson system)

spectral / color information

double/multiple star system information

note (category: spectroscopic binaries):

8.4y, K 13.3k/s, V0 +33.2k/s, asini 547. Unresolved by speckle interferometry.

miscellaneous information

note (category: group membership):

Ori OB1; exciting star of HII region S264; Lambda Ori assoc.

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

position, motion, parallax:

magnitude:

visual	4.41 (observed)	source: 25
photovisual	4.5	source: 2

spectral information:

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.1 arcsec
position angle	20 °

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: 5h 32min 4.419sec	DEC: +9° 27' 26.67''	±0.005 arcsec
position (J2000)	RA: 5h 34min 49.24sec	DEC: +9° 29' 22.34''
proper motion B1950 (FK4)	RA: 0 arcsec/a	DEC: -0.003 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0001 arcsec/a	DEC: -0.004 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	B0
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 34.8min	DEC: +9° 29'
proper motion (J2000)	RA: 0.002 arcsec/a	DEC: -0.004 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
-	1979	1	20°	0.1''	4.41	-	B0III	MCA 20

discoverer information:

discoverer code	discoverer	reference
MCA 20	McAlister, H.A.	-

notes:

note	Phi (1) Ori. This speckle observation probably repre- sents the known spectroscopic binary with P = 8.4yr.

catalogues and names	j¹Ori, 37 Ori, HR 1876, HD 36822, SAO 112914, BD +9 877, FK5: 208, WDS 05348+0929
constellation	Orion