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 (Vol. I-III)

catalogues and names

catalogues and names	a Lup, alf Lup, HR 5469, HD 129056, SAO 225128, CD -46 9501, FK5: 541, WDS 14420-4724
constellation	Lupus

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

position, motion, parallax:

position (J2000)	RA: 14h 41min 55.8sec	DEC: -47° 23' 18''
position (2000.72)	RA: 14h 41min 59sec	DEC: -47° 23' 29''
position (B1900)	RA: 14h 35min 16.5sec	DEC: -46° 57' 32''
proper motion (J2000)	RA: -0.021 arcsec/a	DEC: -0.018 arcsec/a
radial velocity	5 km/s note: spectroscopic binaries
rotational velocity	24 km/s (uncertain) (variable)
galactic coordinates	longitude: 321.61°	latitude: 11.44°

magnitude

visual magnitude

2.3 (V on UBV Johnson system)

spectral / color information

spectral class	B1.5III/Vn
B-V-magnitude	-0.2
U-B-magnitude	-0.89
R-I-magnitude

note (category: spectra):

Also classified B1.5Vn. Soft X-ray source.

variability information

variable star identification

Alp Lup

note (category: variability):

Beta C 2.29 - 2.34V, 0.2598466d. Period varies. Possible secondary period 3.145d. Modulation period 10y?

double/multiple star system information

separation	27.6 arcsec
mag difference (of double or brightest multiple)	11.1
note	Worley (1978) update of the IDS

miscellaneous information

note (category: group membership):

Sco-Cen assoc.; certain member of the Sco-Cen cluster; upper Cen group of Sco-Cen assoc.

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

position, motion, parallax:

position (J2000)	RA: 14h 41min 55.768sec	DEC: -47° 23' 17.51''	±0.06 arcsec	source: 15
position (2000.72)	RA: 14h 41min 59sec	DEC: -47° 23' 29''	JD: 2451809.17
proper motion (J2000)	RA: -0.0021 arcsec/a	DEC: -0.018 arcsec/a		source: 25
radial velocity	5 km/s			source: 25
galactic coord. (B1950)	longitude: 321.62°	latitude: 11.44°

magnitude:

visual	2.3 (observed)	source: 25
photovisual	2.9	source: 2
photographic	2.7	source: 2

spectral information:

spectral class	B2		source: 96
Morgan-Keenan	B1.5III/Vn		source: 25
B-magnitude	2.1 ±0.05	B-V-magnitude	-0.2
U-magnitude	1.21 ±0.05	U-B-magnitude	-0.89

variability information:

source of data: 30

variability type	140
var. amplitude	0.05
var. period	0.26
var. epoch	2437418 28. April 1961, 12:00:00 UT
next max light	2451809.26 21. September 2000, 18:14:24 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	27.6 arcsec
magnitude difference between brightest and second brightest component	11.7
position angle	232 °

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
30	GCVS, 4th edition
Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88
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: 14h 38min 35.53sec	DEC: -47° 10' 29.32''	±0.01 arcsec
position (2000.72)	RA: 14h 41min 59sec	DEC: -47° 23' 27''	JD: 2451809.17
position (J2000)	RA: 14h 41min 55.798sec	DEC: -47° 23' 17.4''
proper motion B1950 (FK4)	RA: -0.0017 arcsec/a	DEC: -0.02 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0017 arcsec/a	DEC: -0.017 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	2.9 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	B2
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 541
Durchmusterung	CD-46 9501
Boss General Catalogue	19774
Henry Draper Catalogue	129056

data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 14h 38min 35.5sec

DEC: -47° 10' 29''

variability informations:

variability type	BCEP	pulsating variable star
magnitute at max. brightness	2.29
magnitute at min. brightness	2.34
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2437418.395 28. April 1961, 21:28:48 UT
period [d]	0.2598466
next maximum light [JD]	2451809.2194012 21. September 2000, 17:15:56 UT

spectral information

spectral class

B1.5III

references

to a study	Vol. II GCVS
to a chart/photograph	no chart is avaible, but the star is contained in the 'Cordoba Durchmusterung'

miscanellous

ID in the GCVS catalogue	50/9001
constellation	Lupus
notes on existence	The star is equivalent to '0509004 del'.
There are notes in published catalog.

variability type description

variability type

description

BCEP

Variables of the Beta Cephei type (Beta Cep, Beta CMa), which are pulsating O8-B6 I-V stars with periods of light and radial-velocity variations in the range of 0.1 - 0.6 days and light amplitudes from 0.01 to 0.3 mag in V. The light curves are similar in shape to average radial-velocity curves but lag in phase by a quarter of the period, so that maximum brightness corresponds to maximum contraction, i.e., to minimum stellar radius. The majority of these stars probably show radial pulsations, but some (V649 Per) display nonradial pulsations; multiperiodicity is characteristic of many of these stars.