V0509 Cassiopeiae
catalogues and names
| catalogues and names | V0509 Cas, HR 8752, HD 217476, SAO 35039, BD +56 2923, FK5: 3839 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 23h 0min 5.1sec | DEC: +56° 56' 43'' | ||
| position (B1900) | RA: 22h 55min 52.1sec | DEC: +56° 24' 32'' | ||
| proper motion (J2000) | RA: 0 arcsec/a | DEC: -0.003 arcsec/a | ||
| radial velocity | -58 km/s note: suspected variable radial velocity |
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| rotational velocity | 35 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.002 arcsec | |||
| galactic coordinates | longitude: 108.16° | latitude: -2.7° | ||
magnitude
| visual magnitude | 5 (V on UBV Johnson system) |
spectral / color information
| spectral class | G40 |
| B-V-magnitude | 1.42 |
| U-B-magnitude | 1.16 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
| note (category: spectra): | Formerly classified G0Ia, but is intrinsically considerably brighter. Also classified F8e-KIa + BIV. According to Morgan and Keenan (1973, ARA&A, 11, 29) spectrum has varied slowly from G0 0 to G5 0 over the last 20 years. |
variability information
| variable star identification | V509 Cas |
| note (category: variability): | SRd 4.75 - 5.50V. Spectrum variable. Variable NII emission. Probable nonradial pulsations coupled with mass loss. Phase between V and B-V curves changed between 1980 and 1985, from half phase out of cycle to in phase. Cycles on time scale of about a year. Bimodal radial pulsation inferred (Sheffer and Lambert 1987, PASP, 99, 1277) from analysis of a decade of spectroscopic observations. As opposed to remarks on spectral type, the star appears to be getting bluer (IBVS 3170), implying an increase in temperature of 800 K over the past decade. |
miscellaneous information
| note (category: group membership): | Cep OB1. |
| note (category: miscellaneous): | Radio source. One of the most luminous stars in the galaxy. Circumstellar gas shell. Circumstellar features observed in infrared. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 23h 0min 5.1sec | DEC: +56° 56' 43.43'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.0006 arcsec/a | DEC: -0.003 arcsec/a | source: 25 | |
| radial velocity | -58 km/s | source: 25 | ||
| trigonometric parallax | 0.002 arcsec | - | source: 25 | |
| galactic coord. (B1950) | longitude: 108.16° | latitude: -2.7° | ||
magnitude:
| visual | 4.75 (observed) | source: 30 |
| photovisual | 5.5 | source: 2 |
| photographic | 6 | source: 16 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | G40 | source: 25 | |
| B-magnitude | 6.42 ±0.05 | B-V-magnitude | 1.42 |
| U-magnitude | 7.58 ±0.05 | U-B-magnitude | 1.16 |
variability information:
| variability type | 193 |
| var. amplitude | 0.8 |
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 | |
| 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 | |
| 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: 22h 57min 58.197sec | DEC: +56° 40' 37.16'' | ±0.028 arcsec |
| position (J2000) | RA: 23h 0min 5.099sec | DEC: +56° 56' 44.21'' | |
| proper motion B1950 (FK4) | RA: -0.0006 arcsec/a | DEC: 0.011 arcsec/a | ±0.005 arcsec/a in RA ±0.006 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0004 arcsec/a | DEC: 0.006 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | G0p |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 32063 |
| Durchmusterung | BD+56 2923 |
| Boss General Catalogue | 32063 |
| Henry Draper Catalogue | 217476 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 22h 57min 58.2sec | DEC: +56° 40' 37'' |
variability informations:
| variability type | SRD | pulsating variable star |
| magnitute at max. brightness | 4.75 | |
| magnitute at min. brightness | 5.5 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | F8e-KIa-0+B1V |
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 | 18/509 |
| constellation | Cassiopeia |
| notes on existence | The star is equivalent to '0180510 V0510'. |
| There are notes in published catalog. | |
variability type description
| variability type | description |
| SRD | Semiregular variables, which are giants or supergiants of intermediate and late spectral types showing noticeable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20 to >2000 days, while the shapes of the light curves are rather different and variable, and the amplitudes may be from several hundredths to several magnitudes (usually 1-2 mag in V). SRA Semiregular late-type (M, C, S or Me, Ce, Se) giants displaying persistent periodicity and usually small (<2.5 mag in V) light amplitudes (Z Aqr). Amplitudes and light-curve shapes generally vary and periods are in the range of 35-1200 days. Many of these stars differ from Miras only by showing smaller light amplitudes; SRB Semiregular late-type (M, C, S or Me, Ce, Se) giants with poorly defined periodicity (mean cycles in the range of 20 to 2300 days) or with alternating intervals of periodic and slow irregular changes, and even with light constancy intervals (RR CrB, AF Cyg). Every star of this type may usually be assigned a certain mean period (cycle), which is the value given in the Catalogue. In a number of cases, the simultaneous presence of two or more periods of light variation is observed; SRC Semiregular late-type (M, C, S or Me, Ce, Se) supergiants (Mu Cep) with amplitudes of about 1 mag and periods of light variation from 30 days to several thousand days; SRD Semiregular variable giants and supergiants of F, G, or K spectral types, sometimes with emission lines in their spectra. Amplitudes of light variation are in the range from 0.1 to 4 mag, and the range of periods is from 30 to 1100 days (SX Her, SV UMa). |