109 Herculis
catalogues and names
| catalogues and names | NSV 10742, 109 Her, HR 6895, HD 169414, SAO 86003, BD +21 3411, FK5: 690, WDS 18237+2146A |
| constellation | Hercules |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 18h 23min 41.9sec | DEC: +21° 46' 11'' | ||
| position (B1900) | RA: 18h 19min 26.1sec | DEC: +21° 43' 27'' | ||
| proper motion (J2000) | RA: 0.196 arcsec/a | DEC: -0.242 arcsec/a | ||
| radial velocity | -58 km/s note: suspected variable radial velocity |
|||
| rotational velocity | <17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.025 arcsec | |||
| galactic coordinates | longitude: 49.77° | latitude: 15.6° | ||
magnitude
| visual magnitude | 3.84 (V on UBV Johnson system) |
spectral / color information
| spectral class | K2.5IIIab |
| B-V-magnitude | 1.18 |
| U-B-magnitude | 1.17 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
variability information
| variable star identification | 10742 |
double/multiple star system information
| separation | 221.8 arcsec |
| mag difference (of double or brightest multiple) | 6.5 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 18h 23min 41.889sec | DEC: +21° 46' 11.08'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.0141 arcsec/a | DEC: -0.242 arcsec/a | source: 25 | |
| radial velocity | -58 km/s | source: 25 | ||
| trigonometric parallax | 0.025 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 49.77° | latitude: 15.6° | ||
magnitude:
| visual | 3.84 (observed) | source: 25 |
| photovisual | 3.9 | source: 2 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K2IIIab | source: 25 | |
| B-magnitude | 5.02 ±0.05 | B-V-magnitude | 1.18 |
| U-magnitude | 6.19 ±0.05 | U-B-magnitude | 1.17 |
double/multiple star system information:
| separation between brightest and second brightest component | 226.4 arcsec |
| magnitude difference between brightest and second brightest component | 6.6 |
| position angle | 321 ° |
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: 18h 21min 33.942sec | DEC: +21° 44' 44.36'' | ±0.004 arcsec |
| position (J2000) | RA: 18h 23min 41.889sec | DEC: +21° 46' 11.02'' | |
| proper motion B1950 (FK4) | RA: 0.0139 arcsec/a | DEC: -0.244 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0141 arcsec/a | DEC: -0.243 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3.9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 690 |
| Durchmusterung | BD+21 3411 |
| Boss General Catalogue | 25116 |
| Henry Draper Catalogue | 169414 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 18h 23.7min | DEC: +21° 46' |
| proper motion (J2000) | RA: 0.196 arcsec/a | DEC: -0.242 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 | 1854 | 8 | 321° | 204.8'' | 3.84 | 10.4 | K2.5IIIab | STT |
| 1923 | - | 226.4'' | ||||||
| Aa | 1923 | 1 | 91° | 144.6'' | 3.84 | - | - | STG 7 |
discoverer information:
| discoverer code | discoverer | reference |
| STT | Struve, O. | |
| STG 7 | Struve, G. | - |
notes:
| note | 109 Her. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 18h 21min 33.9sec | DEC: +21° 44' 44'' |
variability informations:
| magnitute at max. brightness | 3.82 |
| magnitute at min. brightness | 3.86 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | K2 |
references
| to a study | 360359D (designation: 109 HER) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |