g1Volantis
| catalogues and names | g1Vol, HR 2735, HD 55864, SAO 256373, WDS 07087-7030B |
| constellation | Volans |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 7h 8min 42,2sec | DEC: -70° 29' 50'' |
| position (J1900) | RA: 7h 9min 33,4sec | DEC: -70° 20' 4'' |
| proper motion (J2000) | RA: 0,007 arcsec/a | DEC: 0,101 arcsec/a |
| radial velocity | -3 km/s note: spectroscopic binaries |
|
| trigonometric parallax | 0,016 arcsec | |
| note (category: dynamical parallaxes): | 0.018". |
magnitude
| visual magnitude | 5,69 (V on UBV Johnson system) |
spectral / color information
| spectral class | F2V |
| B-V-magnitude | 0,4 |
| U-B-magnitude | 0,04 |
variability information
| note (category: variability): | Combined light with HR 2736 varies, but 2736 is probably the variable. |
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 2736. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 7h 8min 42,459sec | DEC: -70° 29' 50,52'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0,0055 arcsec/a | DEC: 0,096 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: -24,05° | ||
| GCI unit vector (J2000) | X: -0,098594 | Y: 0,31896 | Z: -0,942626 | |
magnitude:
| visual | 5,69 (observed) | source: 25 |
| photovisual | 5,8 | source: 2 |
| photographic | 6,4 | source: 2 |
spectral information:
| spectral class | G0 | source: 96 | |
| Morgan-Keenan | F2V | source: 25 | |
| B-magnitude | 6,09 ±0,05 | B-V-magnitude | 0,4 |
| U-magnitude | 6,13 ±0,05 | U-B-magnitude | 0,04 |
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 | |
| 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 | |
| 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 (J1950) | RA: 7h 9min 8,228sec | DEC: -70° 24' 57,88'' | ±0,04 arcsec |
| position (J2000) | RA: 7h 8min 42,154sec | DEC: -70° 29' 49,65'' | |
| proper motion J1950 (FK4) | RA: 0,0017 arcsec/a | DEC: 0,097 arcsec/a | ±0,009 arcsec/a in RA ±0,007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0013 arcsec/a | DEC: 0,1 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5,8 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | G0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 9513 |
| Durchmusterung | CP-70 600B |
| Boss General Catalogue | 9513 |
| Henry Draper Catalogue | 55864 |
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. |