g2Volantis
| catalogues and names | g2Vol, NSV 03448, HR 2736, HD 55865, SAO 256374, FK5: 1189, WDS 07087-7030A |
| constellation | Volans |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 7h 8min 44,9sec | DEC: -70° 29' 56'' |
| position (J1900) | RA: 7h 9min 35,8sec | DEC: -70° 20' 11'' |
| proper motion (J2000) | RA: 0,023 arcsec/a | DEC: 0,106 arcsec/a |
| radial velocity | 3 km/s note: suspected variable radial velocity |
|
| trigonometric parallax | 0,016 arcsec | |
| note (category: dynamical parallaxes): | 0.018". |
magnitude
| visual magnitude | 3,78 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0III |
| B-V-magnitude | 1,04 |
| U-B-magnitude | 0,88 |
variability information
| variable star identification | 3448 |
| note (category: variability): | 3.56 - 3.62V, blend with 2735. |
double/multiple star system information
| separation | 13,6 arcsec |
| mag difference (of double or brightest multiple) | 1,9 |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Binary with HR 2735. Combined mag. and colors, 3.63V, +0.91(B-V), +0.60(U-B), +0.48(R-I). |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 7h 8min 44,877sec | DEC: -70° 29' 56,34'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,0046 arcsec/a | DEC: 0,106 arcsec/a | source: 25 | |
| radial velocity | 3 km/s | source: 25 | ||
| trigonometric parallax | 0,016 | ±0,002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 281,56° | latitude: -24,04° | ||
| GCI unit vector (J2000) | X: -0,098642 | Y: 0,318917 | Z: -0,942636 | |
magnitude:
| visual | 3,78 (observed) | source: 25 |
| photovisual | 3,9 | source: 2 |
| photographic | 4,9 | source: 2 |
spectral information:
| spectral class | K0 | source: 29 | |
| Morgan-Keenan | K0III | source: 25 | |
| B-magnitude | 4,82 ±0,05 | B-V-magnitude | 1,04 |
| U-magnitude | 5,7 ±0,05 | U-B-magnitude | 0,88 |
double/multiple star system information:
| separation between brightest and second brightest component | 13,6 arcsec |
| magnitude difference between brightest and second brightest component | 1,89 |
| position angle | 297 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 3,78 | K0 | g2Volantis, HR 2736, HD 55865, SAO 256374 |
| B | 5,69 | G0 | g1Volantis, HR 2735, HD 55864, SAO 256373 |
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 | |
| 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 | |
| 29 | SAOJ2000 |
| SAO on FK5 at J2000, 1989 | |
data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)
position and proper motion:
| position (J1950) | RA: 7h 9min 10,804sec | DEC: -70° 25' 4,75'' | ±0,011 arcsec |
| position (J2000) | RA: 7h 8min 44,898sec | DEC: -70° 29' 56,46'' | |
| proper motion J1950 (FK4) | RA: 0,0052 arcsec/a | DEC: 0,102 arcsec/a | ±0,003 arcsec/a in RA ±0,003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0049 arcsec/a | DEC: 0,105 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 3,9 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 1189 |
| Durchmusterung | CP-70 600A |
| Boss General Catalogue | 9514 |
| Henry Draper Catalogue | 55865 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 7h 8,7min | DEC: -70° 30' |
| proper motion (J2000) | RA: 0,023 arcsec/a | DEC: 0,106 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 |
| - | 1826 | 20 | 303° | 13,6'' | 3,78 | 5,67 | K0III F2V | DUN 42 |
| 1977 | 297° | - |
discoverer information:
| discoverer code | discoverer | reference |
| DUN 42 | Dunlop, J. | - |
notes:
| note | Gamma (2) and Gamma (1) Vol. B is a spectroscopic binary and is variable. Proper motion of B +028 +096. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 7h 9min 10,8sec | DEC: -70° 25' 5'' |
variability informations:
| magnitute at max. brightness | 3,56 |
| magnitute at min. brightness | 3,62 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | G8 |
references
| to a study | 0807D (designation: 9G VOL) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |