IW Carinae
| catalogues and names |
| SKY2000 - Master Star Catalog |
| Smithsonian Astrophysical Observatory Star Catalog |
| Combined General Catalogue of Variable Stars (Vol. I-III) |
catalogues and names
| catalogues and names | IW Car, HD 82084, SAO 250584, CP -63 1126 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 9h 26min 53.296sec | DEC: -63° 37' 49.13'' | ±0.18 arcsec | source: 16 |
| position (2000.72) | RA: 9h 26min 54sec | DEC: -63° 38' 0'' | JD: 2451809.28 | |
| proper motion (J2000) | RA: 0.0006 arcsec/a | DEC: -0.006 arcsec/a | source: 16 | |
| galactic coord. (B1950) | longitude: 282.42° | latitude: -9.24° | ||
magnitude:
| visual | 7.9 (observed) | source: 20 |
| photovisual | 8.2 | source: 16 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | F7/8 | source: 10 | |
| B-magnitude | 8.74 ±0.014 | B-V-magnitude | 0.84 |
| U-magnitude | 9.43 ±0.018 | U-B-magnitude | 0.69 |
variability information:
| variability type | 132 |
| var. amplitude | 1.7 |
| var. period | 67.5 |
| var. epoch | 2429401 17. May 1939, 12:00:00 UT |
| next max light | 2451811 23. September 2000, 12:00:00 UT |
double/multiple star system information:
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 7.9 | G0 | |
| B | - | - |
sources:
| 10 | Michigan Catalog of 2-Dimensional Spectral Types for the HD Stars, Volumes I-III |
| Houk, N., and A.P. Cowley, Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 1., (Zones -89 to -53 Degrees), Ann Arbor: The University of Michigan, 1975, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 2., (Zones -52 to -40 Degrees), Ann Arbor: The University of Michigan, 1978, and Houk, N., Michigan Catalogue of 2-Dimensional Spectral Types for the HD Stars, Vol. 3., (Zones -40 to -26 Degrees), Ann Arbor: The University of Michigan, 1982 | |
| 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 | |
| 20 | Catalogue of Homogeneous Means in the UBV System |
| Mermilliod, J.C., Catalogue of Homogeneous Means in the UBV System, Institut d'Astronomie, Universite de Lausanne, 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: 9h 25min 42.951sec | DEC: -63° 24' 43.3'' | ±0.014 arcsec |
| position (2000.72) | RA: 9h 26min 54sec | DEC: -63° 37' 59'' | JD: 2451809.28 |
| position (J2000) | RA: 9h 26min 53.221sec | DEC: -63° 37' 48.78'' | |
| proper motion B1950 (FK4) | RA: -0.0009 arcsec/a | DEC: -0.005 arcsec/a | ±0.007 arcsec/a in RA ±0.007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0012 arcsec/a | DEC: -0.002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
spectral information:
| spectral class | +++ |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Variable star in visual magnitude in source catalog |
catalogues
| source catalogue | Cape Annals 20, catalogue number: 2500 |
| Durchmusterung | CP-63 1126 |
| Henry Draper Catalogue | 82084 The "SAO Catalog" entry refers to two consecutive HD numbers, the lower of which is given. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 9h 25min 43sec | DEC: -63° 24' 43'' |
variability informations:
| variability type | RVB | pulsating variable star |
| magnitute at max. brightness | 7.9 | |
| magnitute at min. brightness | 9.6 | |
| photometric system | photographic magnitudes | |
| epoch for maximum light [JD] | 2429401 17. May 1939, 12:00:00 UT |
|
| period [d] | 67.5 | |
| next maximum light [JD] | 2451811 23. September 2000, 12:00:00 UT |
spectral information
| spectral class | F7-8 |
references
| to a study | Vol. I GCVS (see Kholopov et al. 1985-1988) |
| to a chart/photograph | Vol. I GCVS (see Kholopov et al. 1985-1988) |
miscanellous
| ID in the GCVS catalogue | 17/240 |
| constellation | Carina |
| notes on existence | The star is equivalent to '0170241 IX'. |
| There are notes in published catalog. | |
variability type description
| variability type | description |
| RVB | Variables of the RV Tauri type. These are radially pulsating supergiants having spectral types F-G at maximum light and K-M at minimum. The light curves are characterized by the presence of double waves with alternating primary and secondary minima that can vary in depth so that primary minima may become secondary and vice versa. The complete light amplitude may reach 3-4 mag in V. Periods between two adjacent primary minima (usually called formal periods) lie in the range 30-150 days (these are the periods appearing in the Catalogue). Two subtypes, RVA and RVB, are recognized: RVA RV Tauri variables that do not vary in mean magnitude (AC Her); RVB RV Tauri variables that periodically (with periods from 600 to 1500 days and amplitudes up to 2 mag in V) vary in mean magnitude (DF Cyg, RV Tau). |