V0639 Cassiopeiae
catalogues and names
| catalogues and names | V0639 Cas, HR 9097, HD 225094, SAO 10942, BD +62 2356, WDS 00034+6338AB |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 0h 3min 25.7sec | DEC: +63° 38' 31'' | ||
| position (B1900) | RA: 23h 58min 17.4sec | DEC: +63° 5' 1'' | ||
| proper motion (J2000) | RA: -0.008 arcsec/a | DEC: 0.057 arcsec/a | ||
| radial velocity | -43 km/s note: suspected variable radial velocity |
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| galactic coordinates | longitude: 117.63° | latitude: 1.26° | ||
magnitude
| visual magnitude | 6.24 (V on UBV Johnson system) |
spectral / color information
| spectral class | B3Ia |
| B-V-magnitude | 0.33 |
| U-B-magnitude | -0.54 |
| R-I-magnitude |
variability information
| variable star identification | V639 Cas |
| note (category: variability): | I? Amp. 0.1B. |
miscellaneous information
| note (category: group membership): | Cas OB5. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 0h 3min 25.74sec | DEC: +63° 38' 25.91'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: 0 arcsec/a | DEC: 0.003 arcsec/a | source: 25 | |
| radial velocity | -43 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 117.64° | latitude: 1.26° | ||
magnitude:
| visual | 6.24 (observed) | source: 25 |
| photovisual | 6.3 | source: 2 |
| photographic | 6 | source: 16 |
spectral information:
| spectral class | B1 | source: 96 | |
| Morgan-Keenan | B3Ia | source: 25 | |
| B-magnitude | 6.57 ±0.05 | B-V-magnitude | 0.33 |
| U-magnitude | 6.03 ±0.05 | U-B-magnitude | -0.54 |
variability information:
| variability type | 133 |
| var. amplitude | 0.1 |
double/multiple star system information:
| separation between brightest and second brightest component | 0.2 arcsec |
| position angle | 215 ° |
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 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 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: 0h 0min 50.738sec | DEC: +63° 21' 46.38'' | ±0.098 arcsec |
| position (J2000) | RA: 0h 3min 25.704sec | DEC: +63° 38' 31.1'' | |
| proper motion B1950 (FK4) | RA: -0.0012 arcsec/a | DEC: 0.063 arcsec/a | ±0.026 arcsec/a in RA ±0.022 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0011 arcsec/a | DEC: 0.057 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B1 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 17 |
| Durchmusterung | BD+62 2356 |
| Boss General Catalogue | 17 |
| Henry Draper Catalogue | 225094 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 0h 3.4min | DEC: +63° 38' |
| proper motion (J2000) | RA: -0.013 arcsec/a | DEC: 0.001 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 |
| - | 1986 | 6 | 215° | 0.2'' | 6.24 | - | B3Iae | CHR 121 |
discoverer information:
| discoverer code | discoverer | reference |
| CHR 121 | - | - |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 0h 0min 50.7sec | DEC: +63° 21' 46'' |
variability informations:
| variability type | ACYG | pulsating variable star |
| magnitute at max. brightness | 6.19 | |
| magnitute at min. brightness | 6.28 | |
| photometric system | visual, photovisual or Johnson's V |
references
| to a study | E.F.Guinan, G.P.McCook, A.G.Weisenberger, IBVS No.2227,1982. |
| to a chart/photograph | no chart is avaible, but the star is contained in the 'Bonner Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 18/639 |
| constellation | Cassiopeia |
| notes on existence | The star is equivalent to '67001'. |
variability type description
| variability type | description |
| ACYG | Variables of the Alpha Cygni type, which are nonradially pulsating supergiants of Bep-AepIa spectral types. The light changes with amplitudes of the order of 0.1 mag often seem irregular, being caused by the superposition of many oscillations with close periods. Cycles from several days to several weeks are observed. |