s Herculis
catalogues and names
| catalogues and names | s Her, NSV 07837, 35 Her, HR 6168, HD 149630, SAO 46161, BD +42 2724, FK5: 621, WDS 16341+4226 |
| constellation | Hercules |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 34min 6.2sec | DEC: +42° 26' 13'' | ||
| position (B1900) | RA: 16h 30min 52.7sec | DEC: +42° 38' 36'' | ||
| proper motion (J2000) | RA: -0.011 arcsec/a | DEC: 0.046 arcsec/a | ||
| radial velocity | -11 km/s | |||
| rotational velocity | 270 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.01 arcsec | |||
| galactic coordinates | longitude: 66.91° | latitude: 42.7° | ||
magnitude
| visual magnitude | 4.2 (V on UBV Johnson system) |
spectral / color information
| spectral class | B9V |
| B-V-magnitude | -0.01 |
| U-B-magnitude | -0.1 |
| R-I-magnitude |
variability information
| variable star identification | 7837 |
double/multiple star system information
| separation | 0.1 arcsec |
| mag difference (of double or brightest multiple) | 3 |
| note | doublicity discoverd by speckle interferometry |
| note (category: double and multiple data): | Sep. 0.067". Noted as double by speckle interferometry in 1971-2, unresolved at Mayall 4-meter in 1976. Spectrum double-lined. Resolved by speckle observations 1986.45 (Blazit et al. 1987, A&AS, 71, 57). |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 34min 6.189sec | DEC: +42° 26' 13.31'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: -0.001 arcsec/a | DEC: 0.046 arcsec/a | source: 25 | |
| radial velocity | -11 km/s | source: 25 | ||
| trigonometric parallax | 0.01 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 66.91° | latitude: 42.7° | ||
magnitude:
| visual | 4.2 (observed) | source: 25 |
| photovisual | 4.3 | source: 2 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | B9V | source: 25 | |
| B-magnitude | 4.19 ±0.05 | B-V-magnitude | -0.01 |
| U-magnitude | 4.09 ±0.05 | U-B-magnitude | -0.1 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.1 arcsec |
| position angle | 17 ° |
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 32min 29.324sec | DEC: +42° 32' 21.08'' | ±0.004 arcsec |
| position (J2000) | RA: 16h 34min 6.197sec | DEC: +42° 26' 13.33'' | |
| proper motion B1950 (FK4) | RA: -0.0013 arcsec/a | DEC: 0.044 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0009 arcsec/a | DEC: 0.046 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | A0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 621 |
| Durchmusterung | BD+42 2724 |
| Boss General Catalogue | 22296 |
| Henry Draper Catalogue | 149630 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 16h 34.1min | DEC: +42° 26' |
| proper motion (J2000) | RA: -0.011 arcsec/a | DEC: 0.046 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 |
| - | 1972 | 23 | 179° | 0.1'' | 4.2 | - | B9V | LAB |
| 1993 | 17° | - |
discoverer information:
| discoverer code | discoverer | reference |
| LAB | Labeyrie et al |
notes:
| note | Sigma Her. Double-lined spectrum. Possibly ambiguous: P = 15.2 or 7.48yr., a = 0.11 or 0.074" motion retro- grade. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 16h 32min 29.3sec | DEC: +42° 32' 21'' |
variability informations:
| magnitute at max. brightness | 4.18 |
| magnitute at min. brightness | 4.21 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B9 |
references
| to a study | 140098D (designation: SIGMA HER) |