V0776 Herculis
catalogues and names
| catalogues and names | V0776 Her, 45 Her, HR 6234, HD 151525, SAO 121865, BD +5 3272, FK5: 3333, WDS 16478+0515 |
| constellation | Hercules |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 47min 46.4sec | DEC: +5° 14' 48'' | ||
| position (B1900) | RA: 16h 42min 50.9sec | DEC: +5° 25' 34'' | ||
| proper motion (J2000) | RA: -0.016 arcsec/a | DEC: -0.041 arcsec/a | ||
| radial velocity | -16 km/s note: spectroscopic binaries |
|||
| rotational velocity | 42 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.014 arcsec | |||
| galactic coordinates | longitude: 22.85° | latitude: 29.8° | ||
magnitude
| visual magnitude | 5.24 (V on UBV Johnson system) |
spectral / color information
| spectral class | B9pCr: |
| B-V-magnitude | -0.02 |
| U-B-magnitude | -0.02 |
| note (category: spectra): | Oxygen deficient relative to magnesium. |
variability information
| variable star identification | V776 Her |
| note (category: variability): | Alpha CV, 5.21 - 5.27V, amp. 0.04U, 1.31159d. |
double/multiple star system information
| separation | 122.7 arcsec |
| mag difference (of double or brightest multiple) | 5.2 |
| note | Worley (1978) update of the IDS |
miscellaneous information
| note (category: group membership): | Possible Pleiades group. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 47min 46.426sec | DEC: +5° 14' 48.86'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0012 arcsec/a | DEC: -0.026 arcsec/a | source: 25 | |
| radial velocity | -16 km/s | source: 25 | ||
| trigonometric parallax | 0.014 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 22.85° | latitude: 29.8° | ||
magnitude:
| visual | 5.24 (observed) | source: 25 |
| photovisual | 5.3 | source: 2 |
| photographic | 5.1 | source: 16 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | B9pCr: | source: 25 | |
| B-magnitude | 5.22 ±0.05 | B-V-magnitude | -0.02 |
| U-magnitude | 5.2 ±0.05 | U-B-magnitude | -0.02 |
variability information:
| variability type | 160 |
| var. amplitude | 0.1 |
double/multiple star system information:
| separation between brightest and second brightest component | 122.7 arcsec |
| magnitude difference between brightest and second brightest component | 5.91 |
| position angle | 82 ° |
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 | |
| 27 | Catalog of Red Magnitudes (CRM) |
| Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 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 45min 18.566sec | DEC: +5° 20' 5.94'' | ±0.012 arcsec |
| position (J2000) | RA: 16h 47min 46.411sec | DEC: +5° 14' 48.29'' | |
| proper motion B1950 (FK4) | RA: -0.0014 arcsec/a | DEC: -0.039 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0012 arcsec/a | DEC: -0.038 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 Harvard or San Luis photometry. |
spectral information:
| spectral class | A0p |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 22605 |
| Durchmusterung | BD+05 3272 |
| Boss General Catalogue | 22605 |
| Henry Draper Catalogue | 151525 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 16h 47.8min | DEC: +5° 15' |
| proper motion (J2000) | RA: -0.016 arcsec/a | DEC: -0.041 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 |
| - | 1911 | 2 | 84° | 122.7'' | 5.24 | 11.15 | B9pCr: | BUP 174 |
| 1959 | 82° | - |
discoverer information:
| discoverer code | discoverer | reference |
| BUP 174 | - | - |
notes:
| note | 45 Her. A is a spectroscopic binary, and is variable. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 16h 45min 18.6sec | DEC: +5° 20' 6'' |
variability informations:
| variability type | ACV | rotating variable star |
| magnitute at max. brightness | 5.21 | |
| magnitute at min. brightness | 5.27 | |
| photometric system | visual, photovisual or Johnson's V |
references
| to a study | E.W.Burke, T.H.Barr, PASP 93,344,1981. |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Bonner Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 40/776 |
| constellation | Hercules |
| notes on existence | The star is equivalent to '67371'. |
variability type description
| variability type | description |
| ACV | Alpha2 Canum Venaticorum variables. These are main-sequence stars with spectral types B8p-A7p and displaying strong magnetic fields. Spectra show abnormally strong lines of Si, Sr, Cr, and rare earths whose intensities vary with rotation. They exhibit magnetic field and brightness changes (periods of 0.5-160 days or more). The amplitudes of the brightness changes are usually withine 0.01-0.1 mag in V. ACVO Rapidly oscillating Alpha2 CVn variables. These are nonradially pulsating, rotating magnetic variables of Ap spectral type (DO Eri). Pulsation periods are in the range of 6-12 mmag (0.004-0.01 days), while amplitudes of light variation caused by the pulsation are about 0.01 mag in V. The pulsational variations are superposed on those caused by rotation. |