catalogues and names

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

SKY2000 - Master Star Catalog

Smithsonian Astrophysical Observatory Star Catalog

The Washington Visual Double Star Catalog, 1996.0

Combined General Catalogue of Variable Stars (Vol. I-III)

catalogues and names

catalogues and names	Shaula, l Sco, lam Sco, 35 Sco, HR 6527, HD 158926, SAO 208954, CD -37 11673, FK5: 652, WDS 17336-3706A
constellation	Scorpius

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

note (category: star names):

SHAULA.

position, motion, parallax:

position (J2000)	RA: 17h 33min 36.5sec	DEC: -37° 6' 14''
position (2000.72)	RA: 17h 33min 39sec	DEC: -37° 6' 16''
position (B1900)	RA: 17h 26min 49sec	DEC: -37° 1' 51''
proper motion (J2000)	RA: -0.001 arcsec/a	DEC: -0.029 arcsec/a
radial velocity	-3 km/s note: spectroscopic binaries, double lined spectra
rotational velocity	163 km/s (uncertain) (variable)
galactic coordinates	longitude: 351.74°	latitude: -2.21°

magnitude

visual magnitude

1.63 (V on UBV Johnson system)

spectral / color information

spectral class	B2IV+B
B-V-magnitude	-0.22
U-B-magnitude	-0.89
R-I-magnitude

note (category: spectra):

Lyman alpha and Lyman beta observed from COPERNICUS.

note (category: colors):

Color excess E(B-V) = +0.03.

variability information

variable star identification

Lam Sco

note (category: variability):

Beta C 1.59 - 1.65V, 0.2137015d, secondary 0.1068518d, beat period 10.1605d. Also possible 0.04V eclipse. X-ray flare observed in vicinity Lambda Sco on 1 June 1975.

double/multiple star system information

number of components of multiple star system	3
separation	94.9 arcsec
mag difference (of double or brightest multiple)	10.3
component ID	AC
note	Worley (1978) update of the IDS

note (category: spectroscopic binaries):

5.6d. Interferometer measures indicate multiple star.

miscellaneous information

note (category: group membership):

Sco-Cen assoc.

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

position, motion, parallax:

position (J2000)	RA: 17h 33min 36.534sec	DEC: -37° 6' 13.72''	±0.06 arcsec	source: 15
position (2000.72)	RA: 17h 33min 40sec	DEC: -37° 6' 16''	JD: 2451809.16
proper motion (J2000)	RA: -0.0001 arcsec/a	DEC: -0.029 arcsec/a		source: 25
radial velocity	-3 km/s			source: 25
galactic coord. (B1950)	longitude: 351.75°	latitude: -2.21°

magnitude:

visual	1.62 (observed)	source: 30
photovisual	1.7	source: 2
photographic	1.5	source: 2

spectral information:

spectral class	B2		source: 96
Morgan-Keenan	B2IV+B		source: 25
B-magnitude	1.41 ±0.05	B-V-magnitude	-0.22
U-magnitude	0.52 ±0.05	U-B-magnitude	-0.89

variability information:

source of data: 30

variability type	10
var. amplitude	0.06
var. period	0.21
var. epoch	2440000 23. May 1968, 12:00:00 UT
next max light	2451809.35 21. September 2000, 20:24:00 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	41.7 arcsec
magnitude difference between brightest and second brightest component	13.3
position angle	109 °

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: 17h 30min 12.626sec	DEC: -37° 4' 9.63''	±0.009 arcsec
position (2000.72)	RA: 17h 33min 40sec	DEC: -37° 6' 14''	JD: 2451809.16
position (J2000)	RA: 17h 33min 36.551sec	DEC: -37° 6' 13.61''
proper motion B1950 (FK4)	RA: 0.0001 arcsec/a	DEC: -0.029 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: 0.0001 arcsec/a	DEC: -0.028 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	1.7 (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: 652
Durchmusterung	CD-3711673
Boss General Catalogue	23769
Henry Draper Catalogue	158926

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000)	RA: 17h 33.6min	DEC: -37° 6'
proper motion (J2000)	RA: -0.001 arcsec/a	DEC: -0.029 arcsec/a

double/multiple star system information:

component	year	number of measures	position angle	angular separation	magnitude of 1st component	magnitude of 2nd component	spectral class(es)	discoverer code
AB	1897	1	109°	41.7''	1.6	14.9	B2IV+B	SEE 334
AC	1897	1	331°	94.9''	1.6	12	-	DUN 218

discoverer information:

discoverer code	discoverer	reference
SEE 334	See, T.J.	-
DUN 218	Dunlop, J.	-

notes:

note	Lambda Sco. Variable. Spectroscopic binary.

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

position:

position (equinox 1950.0)

RA: 17h 30min 12.6sec

DEC: -37° 4' 10''

variability informations:

variability type	BCEP+E:	pulsating variable star close binary eclipsing system
magnitute at max. brightness	1.62
magnitute amplitude	0.06
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2440000.1235 23. May 1968, 14:57:50 UT
period [d]	0.2136966
next maximum light [JD]	2451809.2113126 21. September 2000, 17:04:17 UT

spectral information

spectral class

B1.5IV

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	73/9011
constellation	Scorpius
notes on existence	The star is equivalent to '07390121mu 1'.
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.
E	Eclipsing binary systems. These are binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other. Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion. EA Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes. EB Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V. EW W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later.