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 (suspected variables)

catalogues and names

catalogues and names	r Her, NSV 08605, 75 Her, HR 6485, HD 157779, SAO 66001, BD +37 2878 A, WDS 17237+3709A
constellation	Hercules

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

position, motion, parallax:

position (J2000)	RA: 17h 23min 41sec	DEC: +37° 8' 45''
position (2001,21)	RA: 17h 23min 44sec	DEC: +37° 8' 41''
position (B1900)	RA: 17h 20min 13,9sec	DEC: +37° 14' 16''
proper motion (J2000)	RA: -0,037 arcsec/a	DEC: 0,006 arcsec/a
radial velocity	-21 km/s
rotational velocity	81 km/s (uncertain) (variable)
trigonometric parallax	-0,002 arcsec
galactic coordinates	longitude: 61,44°	latitude: 32,71°

note (category: dynamical parallaxes):

0.010".

magnitude

visual magnitude

4,52 (original HR magnitude)

spectral / color information

spectral class	B9.5III
B-V-magnitude	-0,03
U-B-magnitude	-0,05
R-I-magnitude

note (category: spectra):

Silicon star.

variability information

variable star identification

8605

note (category: variability):

ADS 10526A, E?

double/multiple star system information

number of components of multiple star system	3
separation	4,2 arcsec
mag difference (of double or brightest multiple)	1
component ID	AB

note (category: double and multiple data):

Binary with HR 6484. Combined colors. Combined mag. 4.17V.

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

position, motion, parallax:

position (J2000)	RA: 17h 23min 40,983sec	DEC: +37° 8' 45,49''	±1,24 arcsec	source: 29
position (2001,21)	RA: 17h 23min 44sec	DEC: +37° 8' 41''	JD: 2451987,37
proper motion (J2000)	RA: -0,0031 arcsec/a	DEC: 0,006 arcsec/a		source: 25
radial velocity	-21 km/s			source: 25
galactic coord. (B1950)	longitude: 61,44°	latitude: 32,71°

magnitude:

visual	4,56 (observed)	source: 25
photovisual	4,5	source: 2
photographic	4,5	source: 2

spectral information:

spectral class	A0		source: 96
Morgan-Keenan	B9.5III		source: 25
B-magnitude	4,53 ±0,05	B-V-magnitude	-0,03
U-magnitude	4,49 ±0,05	U-B-magnitude	-0,04

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	0,2 arcsec
position angle	2 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	4,56	A0	r Herculis, 75 Her, HR 6485, HD 157779, SAO 66001
B	5,49	A0	r Herculis, 75 Her, HR 6484, HD 157778, SAO 66000

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
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
29	SAOJ2000
SAO on FK5 at J2000, 1989
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 21min 57,343sec	DEC: +37° 11' 26,95''	±0,011 arcsec
position (2001,21)	RA: 17h 23min 43sec	DEC: +37° 8' 41''	JD: 2451987,37
position (J2000)	RA: 17h 23min 40,983sec	DEC: +37° 8' 45,49''
proper motion B1950 (FK4)	RA: -0,0035 arcsec/a	DEC: 0,005 arcsec/a	±0,002 arcsec/a in RA ±0,002 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0,0031 arcsec/a	DEC: 0,006 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	4,5 (accuracy: 2 decimals)
source of visual magnitude data	Taken from Harvard or San Luis photometry.

spectral information:

spectral class	A0
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

remarks for duplicity and variability

Double star in Aitken's Double Star Catalogue (Aitken 1932)

catalogues

source catalogue	GC, catalogue number: 23544
Durchmusterung	BD+37 2878A
Boss General Catalogue	23544
Henry Draper Catalogue	157779

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

position and proper motion:

position (J2000)	RA: 17h 23,7min	DEC: +37° 9'
proper motion (J2000)	RA: -0,041 arcsec/a	DEC: 0,001 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	1981	3	22°	0,3''	4,56	-	B9.5III	MCA 48
	1991		2°	0,2''
Aa-B	1822	often	306°	3,7''	4,5	5,5	-	STF2161
	1980		317°	4,2''
Aa-C	1911	2	223°	119,5''	4,5	13,3	-	STF2161

discoverer information:

discoverer code	discoverer	reference
MCA 48	McAlister, H.A.	-
STF2161	Struve, F.G.W.	-

notes:

note	Aa: Rho Her. Suspected of variable velocity, and resolved by speckle interferometry. Aa-B: Proper motion of B -040 000.

data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)

position:

position (equinox 1950.0)

RA: 17h 21min 57,3sec

DEC: +37° 11' 27''

variability informations:

variability type	E:	close binary eclipsing system
magnitute at max. brightness	4,16
magnitute at min. brightness
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

AP

references

to a study

551437D (designation: 114)

miscanellous

There are notes in the published catalog (Kukarkin et al.(1982)).

variability type description

variability type

description

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.