V0656 Herculis
catalogues and names
| catalogues and names | V0656 Her, HR 6452, HD 157049, SAO 102757, BD +18 3351, FK5: 1454 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 17h 20min 18.9sec | DEC: +18° 3' 26'' | ||
| position (B1900) | RA: 17h 15min 54.4sec | DEC: +18° 9' 35'' | ||
| proper motion (J2000) | RA: 0.009 arcsec/a | DEC: -0.055 arcsec/a | ||
| radial velocity | -46 km/s note: suspected variable radial velocity |
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| trigonometric parallax | 0.006 arcsec | |||
| galactic coordinates | longitude: 39.96° | latitude: 27.97° | ||
magnitude
| visual magnitude | 5 (V on UBV Johnson system) |
spectral / color information
| spectral class | M2IIIab |
| B-V-magnitude | 1.62 |
| U-B-magnitude | 2.06 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
variability information
| variable star identification | V656 Her |
| note (category: variability): | Lb? 4.9 - 5.1v, amp. 0.16p. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 17h 20min 18.871sec | DEC: +18° 3' 25.54'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.0006 arcsec/a | DEC: -0.055 arcsec/a | source: 25 | |
| radial velocity | -46 km/s | source: 25 | ||
| trigonometric parallax | 0.006 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 39.96° | latitude: 27.97° | ||
magnitude:
| visual | 5 (observed) | source: 25 |
| photovisual | 5.2 | source: 2 |
spectral information:
| spectral class | M0 | source: 96 | |
| Morgan-Keenan | M2IIIab | source: 25 | |
| B-magnitude | 6.62 ±0.05 | B-V-magnitude | 1.62 |
| U-magnitude | 8.68 ±0.05 | U-B-magnitude | 2.06 |
variability information:
| variability type | 171 |
| var. amplitude | 0.2 |
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 | |
| 25 | Bright Star Catalogue, 5th edition |
| Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994 | |
| 30 | GCVS, 4th edition |
| Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88 | |
| 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: 17h 18min 6.53sec | DEC: +18° 6' 25.67'' | ±0.006 arcsec |
| position (J2000) | RA: 17h 20min 18.869sec | DEC: +18° 3' 25.61'' | |
| proper motion B1950 (FK4) | RA: 0.0005 arcsec/a | DEC: -0.056 arcsec/a | ±0.002 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0006 arcsec/a | DEC: -0.054 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.2 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | M0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 1454 |
| Durchmusterung | BD+18 3351 |
| Boss General Catalogue | 23426 |
| Henry Draper Catalogue | 157049 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 17h 18min 6.5sec | DEC: +18° 6' 26'' |
variability informations:
| variability type | LB: | pulsating variable star |
| magnitute at max. brightness | 4.9 | |
| magnitute at min. brightness | 5.1 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | M2IIIab |
references
| to a study | Vol. I GCVS (see Kholopov et al. 1985-1988) |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Bonner Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 40/656 |
| constellation | Hercules |
| notes on existence | The star is equivalent to '0400657 V0657'. |
variability type description
| variability type | description |
| LB | Slow irregular variables. The light variations of these stars show no evidence of periodicity, or any periodicity present is very poorly defined and appears only occasionally. Like for the type I, stars are often attributed to this type because of being insufficiently studied. Many type L variables are really semiregulars or belong to other types. LB Slow irregular variables of late spectral types (K, M, C, S); as a rule, they are giants (CO Cyg). This type is also ascribed, in the GCVS, to slow red irregular variables in the case of unknown spectral types and luminosities. LC Irregular variable supergiants of late spectral types having amplitudes of about 1 mag in V (TZ Cas). |