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	k Sco, kap Sco, HR 6580, HD 160578, SAO 209163, CD -38 12137, FK5: 660
constellation	Scorpius

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

position, motion, parallax:

position (J2000)	RA: 17h 42min 29.3sec	DEC: -39° 1' 48''
position (2000.72)	RA: 17h 42min 32sec	DEC: -39° 1' 49''
position (B1900)	RA: 17h 35min 34.1sec	DEC: -38° 58' 42''
proper motion (J2000)	RA: -0.006 arcsec/a	DEC: -0.027 arcsec/a
radial velocity	-14 km/s note: spectroscopic binaries
rotational velocity	131 km/s (uncertain) (variable)
galactic coordinates	longitude: 351.04°	latitude: -4.72°

magnitude

visual magnitude

2.41 (V on UBV Johnson system)

spectral / color information

spectral class	B1.5III
B-V-magnitude	-0.22
U-B-magnitude	-0.89
R-I-magnitude

variability information

variable star identification

Kap Sco

note (category: variability):

Beta C 2.39 - 2.42V, 0.1998303d, 0.205430, 7.3316, 0.189512 and 2.591d.

double/multiple star system information

note (category: spectroscopic binaries):

Same periods as VAR.

miscellaneous information

note (category: group membership):

Sco-Cen assoc.

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

position, motion, parallax:

position (J2000)	RA: 17h 42min 29.276sec	DEC: -39° 1' 48.09''	±0.06 arcsec	source: 15
position (2000.72)	RA: 17h 42min 32sec	DEC: -39° 1' 49''	JD: 2451809.17
proper motion (J2000)	RA: -0.0005 arcsec/a	DEC: -0.027 arcsec/a		source: 25
radial velocity	-14 km/s			source: 25
galactic coord. (B1950)	longitude: 351.05°	latitude: -4.72°

magnitude:

visual	2.41 (observed)	source: 25
photovisual	2.5	source: 2
photographic	2.3	source: 2

spectral information:

spectral class	B2		source: 96
Morgan-Keenan	B1.5III		source: 25
B-magnitude	2.19 ±0.05	B-V-magnitude	-0.22
U-magnitude	1.3 ±0.05	U-B-magnitude	-0.89

variability information:

source of data: 30

variability type	140
var. amplitude	0.01
var. period	0.2

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
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: 17h 39min 1.548sec	DEC: -39° 0' 22.76''	±0.009 arcsec
position (2000.72)	RA: 17h 42min 33sec	DEC: -39° 1' 48''	JD: 2451809.17
position (J2000)	RA: 17h 42min 29.264sec	DEC: -39° 1' 48.28''
proper motion B1950 (FK4)	RA: -0.0006 arcsec/a	DEC: -0.029 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0006 arcsec/a	DEC: -0.029 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	2.5 (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: 660
Durchmusterung	CD-3812137
Boss General Catalogue	23988
Henry Draper Catalogue	160578

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

position:

position (equinox 1950.0)

RA: 17h 39min 1.5sec

DEC: -39° 0' 23''

variability informations:

variability type	BCEP	pulsating variable star
magnitute at max. brightness	2.41
magnitute at min. brightness	2.42
photometric system	visual, photovisual or Johnson's V
period [d]	0.1998303

spectral information

spectral class

B1.5III

references

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

miscanellous

ID in the GCVS catalogue	73/9010
constellation	Scorpius
notes on existence	The star is equivalent to '0739011 lam'.
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.