catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

Combined General Catalogue of Variable Stars (suspected variables)

catalogues and names

catalogues and names	NSV 02677, 55 Ori, HR 2031, HD 39291, SAO 132591, BD -7 1187, FK5: 2442
constellation	Orion

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

position, motion, parallax:

position (J2000)	RA: 5h 51min 22sec	DEC: -7° 31' 5''
position (B1900)	RA: 5h 46min 32.3sec	DEC: -7° 32' 41''
proper motion (J2000)	RA: -0.001 arcsec/a	DEC: 0.003 arcsec/a
radial velocity	20 km/s note: variable radial velocity
rotational velocity	164 km/s (uncertain) (variable)
galactic coordinates	longitude: 212.89°	latitude: -16.76°

magnitude

visual magnitude

5.35 (V on UBV Johnson system)

spectral / color information

spectral class	B2IV-V
B-V-magnitude	-0.2
U-B-magnitude	-0.83

variability information

variable star identification

2677

miscellaneous information

note (category: group membership):

Ori OB1c.

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

position, motion, parallax:

position (J2000)	RA: 5h 51min 21.98sec	DEC: -7° 31' 4.66''	±0.22 arcsec	source: 15
proper motion (J2000)	RA: 0 arcsec/a	DEC: 0.003 arcsec/a		source: 25
radial velocity	20 km/s			source: 25
galactic coord. (B1950)	longitude: 212.89°	latitude: -16.76°

magnitude:

visual	5.35 (observed)	source: 25
photovisual	5.3	source: 2
photographic	5.2	source: 2

spectral information:

spectral class	B3		source: 96
Morgan-Keenan	B2IV-V		source: 25
B-magnitude	5.15 ±0.05	B-V-magnitude	-0.2
U-magnitude	4.32 ±0.05	U-B-magnitude	-0.83

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
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 48min 57.053sec	DEC: -7° 31' 48''	±0.02 arcsec
position (J2000)	RA: 5h 51min 21.99sec	DEC: -7° 31' 4.96''
proper motion B1950 (FK4)	RA: -0.0002 arcsec/a	DEC: -0.002 arcsec/a	±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0002 arcsec/a	DEC: -0.001 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5.3 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	B3
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 7354
Durchmusterung	BD-07 1187
Boss General Catalogue	7354
Henry Draper Catalogue	39291

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

position:

position (equinox 1950.0)

RA: 5h 48min 57.1sec

DEC: -7° 31' 48''

variability informations:

magnitute at max. brightness	5.33
magnitute at min. brightness	5.4
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

B2

references

to a study

670958D (designation: HD 39291)