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	q Oph, tet Oph, 42 Oph, HR 6453, HD 157056, SAO 185320, CD -24 13292, FK5: 644
constellation	Ophiuchus

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

position, motion, parallax:

position (J2000)	RA: 17h 22min 0.6sec	DEC: -24° 59' 58''
position (2000.72)	RA: 17h 22min 4sec	DEC: -25° 0' 0''
position (B1900)	RA: 17h 15min 52sec	DEC: -24° 53' 59''
proper motion (J2000)	RA: -0.004 arcsec/a	DEC: -0.02 arcsec/a
radial velocity	-2 km/s note: spectroscopic binaries
rotational velocity	35 km/s (uncertain) (variable)
galactic coordinates	longitude: 0.46°	latitude: 6.55°

magnitude

visual magnitude

3.27 (V on UBV Johnson system)

spectral / color information

spectral class	B2IV
B-V-magnitude	-0.22
U-B-magnitude	-0.86
R-I-magnitude

variability information

variable star identification

The Oph

note (category: variability):

Beta C 3.25 - 3.31V, multi-periodic 0.140531 and others ranging from 0.0464 to 0.1399d.

double/multiple star system information

separation	0 arcsec
mag difference (of double or brightest multiple)	2

note (category: spectroscopic binaries):

3.6, 5.6v, sep. 0.00003", 11.44d. K 5.25k/s, V0 -1.5k/s. Also 0.29d.

miscellaneous information

note (category: group membership):

Sco OB2; Sco-Cen cluster; Sco-Cen assoc.; upper Sco.

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

position, motion, parallax:

position (J2000)	RA: 17h 22min 0.587sec	DEC: -24° 59' 58.25''	±0.06 arcsec	source: 15
position (2000.72)	RA: 17h 22min 4sec	DEC: -25° 0' 0''	JD: 2451809.20
proper motion (J2000)	RA: -0.0003 arcsec/a	DEC: -0.02 arcsec/a		source: 25
radial velocity	-2 km/s			source: 25
galactic coord. (B1950)	longitude: 0.47°	latitude: 6.55°

magnitude:

visual	3.25 (observed)	source: 30
photovisual	3.4	source: 2
photographic	3.2	source: 2

spectral information:

spectral class	B3		source: 96
Morgan-Keenan	B2IV		source: 25
B-magnitude	3.05 ±0.05	B-V-magnitude	-0.22
U-magnitude	2.19 ±0.05	U-B-magnitude	-0.86

variability information:

source of data: 30

variability type	140
var. amplitude	0.06
var. period	0.14
var. epoch	2440324 12. April 1969, 12:00:00 UT
next max light	2451809.32 21. September 2000, 19:40:48 UT

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.2 arcsec
position angle	234 °

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 18min 56.157sec	DEC: -24° 57' 5.2''	±0.004 arcsec
position (2000.72)	RA: 17h 22min 3sec	DEC: -24° 59' 59''	JD: 2451809.20
position (J2000)	RA: 17h 22min 0.585sec	DEC: -24° 59' 58.22''
proper motion B1950 (FK4)	RA: -0.0002 arcsec/a	DEC: -0.021 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0003 arcsec/a	DEC: -0.019 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.4 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	B3
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 644
Durchmusterung	CD-2413292
Boss General Catalogue	23451
Henry Draper Catalogue	157056

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

position:

position (equinox 1950.0)

RA: 17h 18min 56.2sec

DEC: -24° 57' 5''

variability informations:

variability type	BCEP	pulsating variable star
magnitute at max. brightness	3.25
magnitute at min. brightness	3.31
photometric system	visual, photovisual or Johnson's V
epoch for maximum light [JD]	2440324.23 12. April 1969, 17:31:12 UT
period [d]	0.140531
next maximum light [JD]	2451809.266506 21. September 2000, 18:23:46 UT

spectral information

spectral class

B2IV

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	59/9008
constellation	Ophiuchus
notes on existence	The star is equivalent to '0599010 kap'.
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.