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	Mirfak, k Her, NSV 07471, 7 Her, HR 6008, HD 145001, SAO 101951, BD +17 2964, FK5: 1421, WDS 16081+1703A
other names	Marfik, Marsik, Marfak
constellation	Hercules

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

note (category: star names):

Marfik; Marsik; Mirfak; Marfak.

position, motion, parallax:

position (J2000)	RA: 16h 8min 4,5sec	DEC: +17° 2' 49''
position (2001,21)	RA: 16h 8min 7sec	DEC: +17° 2' 38''
position (B1900)	RA: 16h 3min 33,6sec	DEC: +17° 18' 48''
proper motion (J2000)	RA: -0,032 arcsec/a	DEC: -0,007 arcsec/a
radial velocity	-11 km/s note: suspected variable radial velocity
rotational velocity	10 km/s (uncertain) (variable)
trigonometric parallax	0,002 arcsec
galactic coordinates	longitude: 31,02°	latitude: 43,64°

magnitude

visual magnitude

5 (V on UBV Johnson system)

spectral / color information

spectral class	G8III
B-V-magnitude	0,95
U-B-magnitude	0,61
R-I-magnitude

note (category: spectra):

Also classified G8II, G7III.

variability information

variable star identification

7471

double/multiple star system information

number of components of multiple star system	3
separation	28,1 arcsec
mag difference (of double or brightest multiple)	1,2
component ID	AB

note (category: double and multiple data):

Optical pair with HR 6009.

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

position, motion, parallax:

position (J2000)	RA: 16h 8min 4,534sec	DEC: +17° 2' 49,03''	±0,06 arcsec	source: 15
position (2001,21)	RA: 16h 8min 8sec	DEC: +17° 2' 38''	JD: 2451987,37
proper motion (J2000)	RA: -0,0022 arcsec/a	DEC: -0,007 arcsec/a		source: 25
radial velocity	-10 km/s			source: 25
trigonometric parallax	0,002 arcsec		-	source: 25
galactic coord. (B1950)	longitude: 31,02°	latitude: 43,64°

magnitude:

visual	5 (observed)	source: 25
photovisual	5,3	source: 2

spectral information:

spectral class	G5		source: 96
Morgan-Keenan	G8III		source: 25
B-magnitude	5,95 ±0,05	B-V-magnitude	0,95
U-magnitude	6,56 ±0,05	U-B-magnitude	0,61

double/multiple star system information:

source of data: 19

separation between brightest and second brightest component	27,9 arcsec
magnitude difference between brightest and second brightest component	1,25
position angle	13 °

component	magnitude	spectral class	catalogue(s)/name(s)
A	5	G5	Mirfak, k Herculis, 7 Her, HR 6008, HD 145001, SAO 101951
B	6,25	G5	k Herculis, 7 Her, HR 6009, HD 145000, SAO 101952

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
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 5min 48,989sec	DEC: +17° 10' 43,81''	±0,005 arcsec
position (2001,21)	RA: 16h 8min 8sec	DEC: +17° 2' 38''	JD: 2451987,37
position (J2000)	RA: 16h 8min 4,54sec	DEC: +17° 2' 48,92''
proper motion B1950 (FK4)	RA: -0,0022 arcsec/a	DEC: -0,011 arcsec/a	±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC
proper motion J2000 (FK5)	RA: -0,0021 arcsec/a	DEC: -0,008 arcsec/a
source of proper motion data	Determined by source catalog

magnitude:

visual	5,3 (accuracy: 2 decimals)
source of visual magnitude data	Taken from the "Henry Draper Catalogue".

spectral information:

spectral class	G5
source of spectral data	Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue	FK4, catalogue number: 1421
Durchmusterung	BD+17 2964
Boss General Catalogue	21696
Henry Draper Catalogue	145001

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

position and proper motion:

position (J2000)	RA: 16h 8,1min	DEC: +17° 3'
proper motion (J2000)	RA: -0,032 arcsec/a	DEC: -0,007 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	1822	88	10°	31,4''	5	6,25	G7III	STF2010
	1985		13°	27,9''
AC	1912	2	212°	62,7''	5,3	13,6	-	STF2010

discoverer information:

discoverer code	discoverer	reference
STF2010	Struve, F.G.W.	-

notes:

note	Kappa Her. B is BD+17@2965. Proper motion of B -021 -035. Mt. Wilson spectral types G4 and K1.

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

position:

position (equinox 1950.0)

RA: 16h 5min 49sec

DEC: +17° 10' 44''

variability informations:

magnitute at max. brightness	4,7
magnitute at min. brightness	5,02
photometric system	visual, photovisual or Johnson's V

spectral information

spectral class

G8

references

to a study

660820D (designation: BS 6008)

miscanellous

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