catalogues and names

The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

catalogues and names

catalogues and names	p2Ori, 2 Ori, HR 1544, HD 30739, SAO 112124, BD +8 777
constellation	Orion

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

note (category: star names):

See HR 1543.

position, motion, parallax:

position (J2000)	RA: 4h 50min 36.7sec	DEC: +8° 54' 1''
position (B1900)	RA: 4h 45min 9.6sec	DEC: +8° 43' 43''
proper motion (J2000)	RA: 0.004 arcsec/a	DEC: -0.032 arcsec/a
radial velocity	24 km/s note: spectroscopic binaries
rotational velocity	212 km/s (uncertain) (variable)
trigonometric parallax	0.036 arcsec
galactic coordinates	longitude: 189.82°	latitude: -21.83°

magnitude

visual magnitude

4.36 (V on UBV Johnson system)

spectral / color information

spectral class	A1Vn
B-V-magnitude	0.01
U-B-magnitude	0
R-I-magnitude
IR-note	object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

miscellaneous information

note (category: stellar radii or diameters):

Radius relative to Sun = 2.0.

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

position, motion, parallax:

position (J2000)	RA: 4h 50min 36.707sec	DEC: +8° 54' 0.67''	±0.43 arcsec	source: 16
proper motion (J2000)	RA: -0.0002 arcsec/a	DEC: -0.031 arcsec/a		source: 25
radial velocity	24 km/s			source: 25
trigonometric parallax	0.036 arcsec		±0.004 arcsec	source: 25
galactic coord. (B1950)	longitude: 189.83°	latitude: -21.83°

magnitude:

visual	4.36 (observed)	source: 25
photovisual	4.4	source: 2
photographic	4.4	source: 16

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	A1Vn		source: 25
B-magnitude	4.37 ±0.05	B-V-magnitude	0.01
U-magnitude	4.37 ±0.05	U-B-magnitude	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
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 53.047sec	DEC: +8° 48' 57.64''	±0.018 arcsec
position (J2000)	RA: 4h 50min 36.721sec	DEC: +8° 54' 0.56''
proper motion B1950 (FK4)	RA: 0.0001 arcsec/a	DEC: -0.03 arcsec/a	±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0003 arcsec/a	DEC: -0.032 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.4 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	A0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 5892
Durchmusterung	BD+08 777
Boss General Catalogue	5892
Henry Draper Catalogue	30739