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	m1Sco, mu 1 Sco, HR 6247, HD 151890, SAO 208102, CD -37 11033, FK5: 1439
constellation	Scorpius

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

position, motion, parallax:

position (J2000)	RA: 16h 51min 52.2sec	DEC: -38° 2' 51''
position (2000.73)	RA: 16h 51min 55sec	DEC: -38° 2' 55''
position (B1900)	RA: 16h 45min 5.7sec	DEC: -37° 52' 33''
proper motion (J2000)	RA: -0.011 arcsec/a	DEC: -0.025 arcsec/a
radial velocity	-25 km/s note: spectroscopic binaries, double lined spectra note: orbital data avaible
rotational velocity	239 km/s (uncertain) (variable)
galactic coordinates	longitude: 346.12°	latitude: 3.91°

magnitude

visual magnitude

3.08 (V on UBV Johnson system)

spectral / color information

spectral class	B1.5V+B6.5V
B-V-magnitude	-0.2
U-B-magnitude	-0.87
R-I-magnitude

variability information

variable star identification

Mu1 Sco

note (category: variability):

EB 2.80 - 3.08B, 1.44026907d. Semi-detached system.

double/multiple star system information

separation	390 arcsec
mag difference (of double or brightest multiple)	0.4

note (category: double and multiple data):

CPM with HR 6252 at 346".

note (category: spectroscopic binaries):

1.4463d, K 185k/s, V0 0k/s, msin3i 9.09, asini 3.68. Equal components. Semi-detached system.

miscellaneous information

note (category: group membership):

Sco-Cen cluster; Sco-Cen assoc.; upper Sco; member of Pleiades group.

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

position, motion, parallax:

position (J2000)	RA: 16h 51min 52.235sec	DEC: -38° 2' 50.74''	±0.06 arcsec	source: 15
position (2000.73)	RA: 16h 51min 55sec	DEC: -38° 2' 55''	JD: 2451810.11
proper motion (J2000)	RA: -0.0009 arcsec/a	DEC: -0.024 arcsec/a		source: 25
radial velocity	-25 km/s			source: 25
galactic coord. (B1950)	longitude: 346.12°	latitude: 3.91°

magnitude:

visual	2.94 (observed)	source: 30
photovisual	3.1	source: 2
photographic	2.9	source: 2

spectral information:

spectral class	B3		source: 96
Morgan-Keenan	B1.5V+B6.5V		source: 25
B-magnitude	2.88 ±0.05	B-V-magnitude	-0.2
U-magnitude	2.01 ±0.05	U-B-magnitude	-0.87

variability information:

source of data: 30

variability type	10
var. amplitude	0.28
var. period	1.45
var. epoch	2432001 29. June 1946, 12:00:00 UT
next max light	2451810.9 23. September 2000, 09:36:00 UT

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: 16h 48min 28.679sec	DEC: -37° 57' 48.92''	±0.01 arcsec
position (2000.73)	RA: 16h 51min 56sec	DEC: -38° 2' 54''	JD: 2451810.11
position (J2000)	RA: 16h 51min 52.228sec	DEC: -38° 2' 51.02''
proper motion B1950 (FK4)	RA: -0.001 arcsec/a	DEC: -0.029 arcsec/a	±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.001 arcsec/a	DEC: -0.028 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.1 (accuracy: 2 decimals)
source of visual magnitude data	Arithmetic mean of maximum and minimum magnitudes of a variable star

spectral information:

spectral class	B3p
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Variable star in visual magnitude in source catalog

catalogues

source catalogue	FK4, catalogue number: 1439
Durchmusterung	CD-3711033
Boss General Catalogue	22677
Henry Draper Catalogue	151890

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

position:

position (equinox 1950.0)

RA: 16h 48min 28.7sec

DEC: -37° 57' 49''

variability informations:

variability type	EB/SD	close binary eclipsing system
magnitute at max. brightness	2.94
magnitute at min. brightness	3.22
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2432001.0451 29. June 1946, 13:04:57 UT
period [d]	1.44626907
next maximum light [JD]	2451810.59255179 23. September 2000, 02:13:16 UT

spectral information

spectral class

B1.5V+B6.5V

references

to a study	Vol. I GCVS (see Kholopov et al. 1985-1988)
to a chart/photograph	no chart is avaible, but the star is contained in the 'Cordoba Durchmusterung'

miscanellous

ID in the GCVS catalogue	73/90121
constellation	Scorpius
notes on existence	The star is equivalent to '0739018 sig'.
There are notes in published catalog.

variability type description

variability type	description
EB	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.
SD	Semidetached systems in which the surface of the less massive component is close to its inner Roche lobe.