GX Velorum
catalogues and names
| catalogues and names | GX Vel, HR 3654, HD 79186, SAO 220928, CD -44 5206 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 9h 11min 4.4sec | DEC: -44° 52' 5'' | ||
| position (2000.72) | RA: 9h 11min 6sec | DEC: -44° 52' 16'' | ||
| position (B1900) | RA: 9h 7min 26.6sec | DEC: -44° 27' 31'' | ||
| proper motion (J2000) | RA: -0.001 arcsec/a | DEC: 0.002 arcsec/a | ||
| radial velocity | 34 km/s note: suspected variable radial velocity |
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| rotational velocity | 61 km/s (uncertain) (variable) | |||
| galactic coordinates | longitude: 267.36° | latitude: 2.25° | ||
magnitude
| visual magnitude | 5 (V on UBV Johnson system) |
spectral / color information
| spectral class | B5Ia |
| B-V-magnitude | 0.23 |
| U-B-magnitude | -0.57 |
| R-I-magnitude |
variability information
| variable star identification | GX Vel |
| note (category: variability): | Amp. 0.07V. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 9h 11min 4.405sec | DEC: -44° 52' 4.59'' | ±0.19 arcsec | source: 16 |
| position (2000.72) | RA: 9h 11min 6sec | DEC: -44° 52' 16'' | JD: 2451809.25 | |
| proper motion (J2000) | RA: -0.0003 arcsec/a | DEC: -0.001 arcsec/a | source: 25 | |
| radial velocity | 34 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 267.37° | latitude: 2.25° | ||
magnitude:
| visual | 4.97 (observed) | source: 30 |
| photovisual | 4.8 | source: 16 |
spectral information:
| spectral class | B5 | source: 96 | |
| Morgan-Keenan | B5Ia | source: 25 | |
| B-magnitude | 5.23 ±0.05 | B-V-magnitude | 0.23 |
| U-magnitude | 4.66 ±0.05 | U-B-magnitude | -0.57 |
variability information:
| variability type | 133 |
| var. amplitude | 0.07 |
sources:
| 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 | |
| 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 9min 15.413sec | DEC: -44° 39' 45.16'' | ±0.03 arcsec |
| position (2000.72) | RA: 9h 11min 6sec | DEC: -44° 52' 15'' | JD: 2451809.25 |
| position (J2000) | RA: 9h 11min 4.403sec | DEC: -44° 52' 4.59'' | |
| proper motion B1950 (FK4) | RA: -0.0007 arcsec/a | DEC: 0 arcsec/a | ±0.007 arcsec/a in RA ±0.005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0001 arcsec/a | DEC: 0.002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 12688 |
| Durchmusterung | CD-44 5206 |
| Boss General Catalogue | 12688 |
| Henry Draper Catalogue | 79186 |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 9h 9min 15.4sec | DEC: -44° 39' 45'' |
variability informations:
| variability type | ACYG: | pulsating variable star |
| magnitute at max. brightness | 4.97 | |
| magnitute at min. brightness | 5.04 | |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B5Ia |
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 'Cordoba Durchmusterung' |
miscanellous
| ID in the GCVS catalogue | 85/206 |
| constellation | Vela |
| notes on existence | The star is equivalent to '0850207 GY'. |
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. |