z Herculis


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0

  5. Combined General Catalogue of Variable Stars (suspected variables)


catalogues and names z Her, NSV 07915, 40 Her, HR 6212, HD 150680, SAO 65485, WDS 16413+3136
constellation Hercules

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


object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 16h 41min 17,2sec DEC: +31 36' 11''
position (J1900) RA: 16h 37min 30,9sec DEC: +31 47' 1''
proper motion (J2000) RA: -0,47 arcsec/a DEC: 0,394 arcsec/a
radial velocity -70 km/s
note: spectroscopic binaries, single lined spectra
note: orbital data avaible
rotational velocity =<10 km/s (uncertain) (variable)
trigonometric parallax 0,102 arcsec
note (category: dynamical parallaxes): 0.096".

magnitude

visual magnitude 2,81
(V on UBV Johnson system)

spectral / color information

spectral class G0IV
B-V-magnitude 0,65
U-B-magnitude 0,21
R-I-magnitude 0,32

variability information

variable star identification 7915
note (category: variability): ADS 10157A is var. suspect NSV 7915.

double/multiple star system information

separation 1,1 arcsec
mag difference (of double or brightest multiple) 2,6
note (category: double and multiple data): ADS 10157AB, 2.90 F9IV, 5.53 G7V, 34.49y, a = 1.355". ADS 10157A*, 10.5y, a = 0.08".
note (category: spectroscopic binaries): ADS 10157A, 34.417y D, K 3.8k/s, V0 -69.9k/s, asini 590. Resolved by speckle interferometry.

miscellaneous information

note (category: group membership): Zeta Her group.

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

position, motion, parallax:

position (J2000) RA: 16h 41min 17,156sec DEC: +31 36' 10,36'' 0,43 arcsec source: 16
proper motion (J2000) RA: -0,038 arcsec/a DEC: 0,387 arcsec/a source: 25
radial velocity -70 km/s source: 25
trigonometric parallax 0,102 0,01 arcsec source: 25
galactic coord. (B1950) longitude: 52,65 latitude: 40,28
GCI unit vector (J2000) X: -0,286804 Y: -0,801959 Z: 0,524029

magnitude:

visual 2,81 (observed) source: 25
photovisual 3 source: 2
photographic 3,6 source: 16

spectral information:

spectral class G0 source: 96
Morgan-Keenan G0IV source: 25
B-magnitude 3,46 0,05 B-V-magnitude 0,65
U-magnitude 3,67 0,05 U-B-magnitude 0,21

double/multiple star system information:

source of data: 19
magnitude difference between brightest and second brightest component 3,5

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
16 PPM North and PPM South Catalogs and PPM Supplement
Roser, S., and U. Bastian, "Catalogue of Positions and Proper Motions," A&AS, Vol. 74, p. 449, 1988, and Bastian, U., et al., "Catalogue of Positions and Proper Motions - South," 1993
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 (J1950) RA: 16h 39min 23,987sec DEC: +31 41' 32,12'' 0,008 arcsec
position (J2000) RA: 16h 41min 17,216sec DEC: +31 36' 10,6''
proper motion J1950 (FK4) RA: -0,0369 arcsec/a DEC: 0,394 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0368 arcsec/a DEC: 0,394 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 3 (accuracy: 2 decimals)
source of visual magnitude data Combined magnitude of component stars.

spectral information:

spectral class G0
source of spectral data Taken from the HD with M stars reclassified by Miss Cannon.

remarks for duplicity and variability

Double star - see source catalog for source

catalogues

source catalogue FK3, catalogue number: 1634
Durchmusterung BD+31 2884
Boss General Catalogue 22464
Henry Draper Catalogue 150680

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

position and proper motion:

position (J2000) RA: 16h 41,3min DEC: +31 36'
proper motion (J2000) RA: -0,468 arcsec/a DEC: 0,388 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
- 1826 often '' 3 6,5 G1IV STF2084

discoverer information:

discoverer code discoverer reference
STF2084 Struve, F.G.W. -

notes:

note Zeta Her. P = 34.5yr., a = 1.36", motion retrograde.

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

position:

position (J1950) RA: 16h 39min 24sec DEC: +31 41' 32''

variability informations:

magnitute at max. brightness 2,78
magnitute at min. brightness 2,85
photometric system visual, photovisual or Johnson's V

spectral information

spectral class *

references

to a study 182615D (designation: zeta HER)

miscanellous

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