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	c2Ori, khi 2 Ori, 62 Ori, HR 2135, HD 41117, SAO 77911, BD +20 1233
constellation	Orion

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

position, motion, parallax:

position (J2000)	RA: 6h 3min 55.2sec	DEC: +20° 8' 18''
position (B1900)	RA: 5h 57min 58.8sec	DEC: +20° 8' 27''
proper motion (J2000)	RA: 0.002 arcsec/a	DEC: -0.006 arcsec/a
radial velocity	17 km/s note: variable radial velocity
rotational velocity	36 km/s (uncertain) (variable)
trigonometric parallax	0.025 arcsec
galactic coordinates	longitude: 189.69°	latitude: -0.86°

magnitude

visual magnitude

4.63 (V on UBV Johnson system)

spectral / color information

spectral class	B2Ia
B-V-magnitude	0.28
U-B-magnitude	-0.68
R-I-magnitude

note (category: spectra):

Emission lines possibly variable.

variability information

variable star identification

2809

note (category: variability):

H alpha profile var.

double/multiple star system information

separation	0 arcsec
mag difference (of double or brightest multiple)	0
note	doublicity discoverd by occultation

note (category: double and multiple data):

Occultation binary, sep. 0.02".

miscellaneous information

note (category: group membership):

Gem OB1.

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

position, motion, parallax:

position (J2000)	RA: 6h 3min 55.189sec	DEC: +20° 8' 18.39''	±0.35 arcsec	source: 17
proper motion (J2000)	RA: 0.0001 arcsec/a	DEC: -0.003 arcsec/a		source: 25
radial velocity	17 km/s			source: 25
trigonometric parallax	0.025 arcsec		±0.002 arcsec	source: 25
galactic coord. (B1950)	longitude: 189.7°	latitude: -0.86°

magnitude:

visual	4.63 (observed)	source: 25
photovisual	4.7	source: 2
photographic	4.5	source: 16

spectral information:

spectral class	B2		source: 96
Morgan-Keenan	B2Ia		source: 25
B-magnitude	4.91 ±0.05	B-V-magnitude	0.28
U-magnitude	4.23 ±0.05	U-B-magnitude	-0.68

double/multiple star system information:

source of data: 25

separation between brightest and second brightest component	0 arcsec
magnitude difference between brightest and second brightest component	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
17	ACRS
Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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: 6h 0min 56.956sec	DEC: +20° 8' 28.96''	±0.016 arcsec
position (J2000)	RA: 6h 3min 55.201sec	DEC: +20° 8' 18.04''
proper motion B1950 (FK4)	RA: 0.0002 arcsec/a	DEC: -0.007 arcsec/a	±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0001 arcsec/a	DEC: -0.006 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4.7 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	B2p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	GC, catalogue number: 7675
Durchmusterung	BD+20 1233
Boss General Catalogue	7675
Henry Draper Catalogue	41117