g Sextantis
| catalogues and names | g Sex, 8 Sex, HR 3909, HD 85558, SAO 137199, WDS 09525-0806A |
| constellation | Sextans |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 9h 52min 30,4sec | DEC: -8° 6' 18'' |
| position (J1900) | RA: 9h 47min 33,4sec | DEC: -7° 38' 3'' |
| proper motion (J2000) | RA: -0,055 arcsec/a | DEC: -0,04 arcsec/a |
| radial velocity | 12 km/s note: variable radial velocity |
|
| rotational velocity | 114 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,013 arcsec | |
| note (category: dynamical parallaxes): | 0.012". |
magnitude
| visual magnitude | 5,05 (V on UBV Johnson system) |
spectral / color information
| spectral class | A1V |
| B-V-magnitude | 0,04 |
| U-B-magnitude | 0,06 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 0,4 arcsec |
| mag difference (of double or brightest multiple) | 0,5 |
| component ID | AB |
| note (category: double and multiple data): | AB 5.58 A1V, 6.07 A4V, 77.55y, a = 0.383". Combined mag., colors. C, 12.28V at 36" optical. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 9h 52min 30,438sec | DEC: -8° 6' 17,95'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0038 arcsec/a | DEC: -0,041 arcsec/a | source: 25 | |
| radial velocity | 12 km/s | source: 25 | ||
| trigonometric parallax | 0,013 | ±0,001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 245,58° | latitude: 34,17° | ||
| GCI unit vector (J2000) | X: -0,840737 | Y: 0,522766 | Z: -0,140987 | |
magnitude:
| visual | 5,05 (observed) | source: 25 |
| photovisual | 4,8 | source: 16 |
| photographic | 5,2 | source: 2 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A1V | source: 25 | |
| B-magnitude | 5,09 ±0,05 | B-V-magnitude | 0,04 |
| U-magnitude | 5,15 ±0,05 | U-B-magnitude | 0,06 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 0,3 |
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: 9h 50min 1,878sec | DEC: -7° 52' 7,35'' | ±0,027 arcsec |
| position (J2000) | RA: 9h 52min 30,449sec | DEC: -8° 6' 17,6'' | |
| proper motion J1950 (FK4) | RA: -0,004 arcsec/a | DEC: -0,045 arcsec/a | ±0,004 arcsec/a in RA ±0,004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0037 arcsec/a | DEC: -0,04 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5,2 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A2 |
| 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: 13593 |
| Durchmusterung | BD-07 2909 |
| Boss General Catalogue | 13593 |
| Henry Draper Catalogue | 85558 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 9h 52,5min | DEC: -8° 6' |
| proper motion (J2000) | RA: -0,057 arcsec/a | DEC: -0,042 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 |
| AB | 1854 | often | ° | '' | 5,7 | 6 | A1V | AC 5 |
| AB-C | 1880 | 8 | 325° | 35,8'' | 5,05 | 12,28 | A2 | HJ 4256 |
| 1963 | 330° | 37,2'' |
discoverer information:
| discoverer code | discoverer | reference |
| AC 5 | - | - |
| HJ 4256 | Herschel, J. | - |
notes:
| note | Gamma Sex. P = 77.6yr., a = 0.38", motion retrograde. |