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	i Her, iot Her, 85 Her, HR 6588, HD 160762, SAO 46872, BD +46 2349, FK5: 663, WDS 17395+4600A
constellation	Hercules

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

position, motion, parallax:

position (J2000)	RA: 17h 39min 27.9sec	DEC: +46° 0' 23''
position (2000.72)	RA: 17h 39min 29sec	DEC: +46° 0' 22''
position (B1900)	RA: 17h 36min 38.4sec	DEC: +46° 3' 34''
proper motion (J2000)	RA: -0.005 arcsec/a	DEC: 0.005 arcsec/a
radial velocity	-20 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible
rotational velocity	11 km/s (uncertain) (variable)
trigonometric parallax	0.005 arcsec
galactic coordinates	longitude: 72.32°	latitude: 31.27°

magnitude

visual magnitude

3.8 (V on UBV Johnson system)

spectral / color information

spectral class	B3IV
B-V-magnitude	-0.18
U-B-magnitude	-0.69
R-I-magnitude

note (category: colors):

Color excess E(B-V) = -0.02.

variability information

variable star identification

Iot Her

note (category: variability):

Beta C?, amp. 0.01V.

double/multiple star system information

separation	116 arcsec
mag difference (of double or brightest multiple)	8.3
note	Worley (1978) update of the IDS

note (category: spectroscopic binaries):

113.804d, K 5.4 k/s, V0 -20.0 k/s, asini 7.629. RV also var. 0.1434d.

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

position, motion, parallax:

position (J2000)	RA: 17h 39min 27.892sec	DEC: +46° 0' 22.9''	±0.06 arcsec	source: 15
position (2000.72)	RA: 17h 39min 29sec	DEC: +46° 0' 22''	JD: 2451809.20
proper motion (J2000)	RA: -0.0005 arcsec/a	DEC: 0.005 arcsec/a		source: 25
radial velocity	-20 km/s			source: 25
trigonometric parallax	0.005 arcsec		-	source: 25
galactic coord. (B1950)	longitude: 72.32°	latitude: 31.27°

magnitude:

visual	3.8 (observed)	source: 25
photovisual	3.8	source: 2

spectral information:

spectral class	B3		source: 96
Morgan-Keenan	B3IV		source: 25
B-magnitude	3.62 ±0.05	B-V-magnitude	-0.18
U-magnitude	2.93 ±0.05	U-B-magnitude	-0.69

variability information:

source of data: 27

variability type	140
var. amplitude	0

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0.2 arcsec
position angle	6 °

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
27	Catalog of Red Magnitudes (CRM)
Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 1994
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 38min 3.064sec	DEC: +46° 1' 55.28''	±0.003 arcsec
position (2000.72)	RA: 17h 39min 29sec	DEC: +46° 0' 21''	JD: 2451809.20
position (J2000)	RA: 17h 39min 27.894sec	DEC: +46° 0' 22.83''
proper motion B1950 (FK4)	RA: -0.001 arcsec/a	DEC: 0.004 arcsec/a	±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0.0005 arcsec/a	DEC: 0.005 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	3.8 (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: 663
Durchmusterung	BD+46 2349
Boss General Catalogue	23965
Henry Draper Catalogue	160762

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

position and proper motion:

position (J2000)	RA: 17h 39.5min	DEC: +46° 0'
proper motion (J2000)	RA: -0.005 arcsec/a	DEC: 0.005 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
Aa	1975	1	6°	0.2''	3.8	-	B3IV	BLA
Aa-B	1913	1	49°	116''	3.8	12.1	-	BU 1459

discoverer information:

discoverer code	discoverer	reference
BLA	Blazit, A. et al
BU 1459	Burnham, S.W.	-

notes:

note	Iota Her. A is a spectroscopic binary, now resolved by speckle interferometry. Aa-B: Proper motion of B -005 +001.

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

position:

position (equinox 1950.0)

RA: 17h 38min 3.1sec

DEC: +46° 1' 55''

variability informations:

variability type	BCEP	pulsating variable star
magnitute at max. brightness	2.93
magnitute amplitude	0.02
photometric system

references

to a study	E.Chapellier, J.M.Le Contel, J.C.Valtier, S.Gonzalez-Bedolla, D.Ducatel, P.J.Morel, J.P.Sareyan, I.Geiger, P.Antonelli, AsAp 176,255,1987.
to a chart/photograph	no chart is avaible, but the star is contained in the 'Bonner Durchmusterung'

miscanellous

ID in the GCVS catalogue	40/9009
constellation	Hercules
notes on existence	The star is equivalent to '69240'.

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.