pi 3 Orionis

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

note (category: star names):

Designated Tabit by Becvar but Allen gives Thabit as Burritt's name for an unlettered star on his atlas, the Upsilon of Heis (HR 1855). The superscripts for Pi Ori adopted in the Harvard catalogues and taken over in the BS correspond to the Heis atlas and Argelander's identifications of Flamsteed numbers. Very many old catalogues follow the BAC. Heis superscripts 1,2,3,4 are respectively 4,2,1,3 in the BAC.

position, motion, parallax:

position (J2000)	RA: 4h 49min 50.4sec	DEC: +6° 57' 41''
position (B1900)	RA: 4h 44min 24.6sec	DEC: +6° 47' 12''
proper motion (J2000)	RA: 0.466 arcsec/a	DEC: 0.012 arcsec/a
radial velocity	24 km/s note: spectroscopic binaries, double lined spectra
rotational velocity	17 km/s (uncertain) (variable)
trigonometric parallax	0.125 arcsec
galactic coordinates	longitude: 191.45°	latitude: -23.07°

magnitude

visual magnitude

3.19
(V on UBV Johnson system)

spectral / color information

spectral class	F6V
B-V-magnitude	0.45
U-B-magnitude	-0.01
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

variability information

variable star identification

1731

note (category: variability):

Delta Sct? Amp. 0.05V.

double/multiple star system information

separation	94.6 arcsec
mag difference (of double or brightest multiple)	5.5
note	Worley (1978) update of the IDS

note (category: double and multiple data):

Visual companion probably optical.

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

position, motion, parallax:

position (J2000)	RA: 4h 49min 50.414sec	DEC: +6° 57' 40.54''	±0.06 arcsec	source: 15
proper motion (J2000)	RA: 0.0313 arcsec/a	DEC: 0.011 arcsec/a		source: 25
radial velocity	24 km/s			source: 25
trigonometric parallax	0.125 arcsec		±0.012 arcsec	source: 25
galactic coord. (B1950)	longitude: 191.45°	latitude: -23.07°

magnitude:

visual	3.19 (observed)	source: 25
photovisual	3.3	source: 2

spectral information:

spectral class	F8		source: 96
Morgan-Keenan	F6V		source: 25
B-magnitude	3.64 ±0.05	B-V-magnitude	0.45
U-magnitude	3.63 ±0.05	U-B-magnitude	-0.01

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	89.9 arcsec
magnitude difference between brightest and second brightest component	5.6
position angle	142 °

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: 4h 47min 7.39sec	DEC: +6° 52' 32.26''	±0.004 arcsec
position (J2000)	RA: 4h 49min 50.413sec	DEC: +6° 57' 40.66''
proper motion B1950 (FK4)	RA: 0.0311 arcsec/a	DEC: 0.017 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0313 arcsec/a	DEC: 0.013 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.3 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	F8
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 1134
Durchmusterung	BD+06 762
Boss General Catalogue	5875
Henry Draper Catalogue	30652

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

position and proper motion:

position (J2000)	RA: 4h 49.8min	DEC: +6° 58'
proper motion (J2000)	RA: 0.466 arcsec/a	DEC: 0.012 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
-	1852	6	128°	112.5''	3.19	8.8	F6V	STT
-	1923	6	142°	89.9''	3.19	8.8	F6V	STT

discoverer information:

discoverer code	discoverer	reference
STT	Struve, O.

notes:

note	Pi (3) Ori. Obviously an optical pair. A spectroscopic binary and possibly a variable of Delta Scuti type.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 4h 47min 7.4sec

DEC: +6° 52' 32''

variability informations:

magnitute at max. brightness	3.15
magnitute at min. brightness	3.21
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

references

to a study	0807D (designation: 6G ORI)
to a chart/photograph	681467

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).

catalogues and names	p³Ori, NSV 01731, 1 Ori, HR 1543, HD 30652, SAO 112106, BD +6 762, FK5: 1134, WDS 04498+0658
constellation	Orion