e Volantis
| catalogues and names | e Vol, HR 3223, HD 68520, SAO 250128, WDS 08079-6837 |
| constellation | Volans |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 8h 7min 55,8sec | DEC: -68° 37' 2'' |
| position (J1900) | RA: 8h 7min 36,4sec | DEC: -68° 19' 24'' |
| proper motion (J2000) | RA: -0,026 arcsec/a | DEC: 0,025 arcsec/a |
| radial velocity | 10 km/s note: spectroscopic binaries note: orbital data avaible |
|
| rotational velocity | 38 km/s (uncertain) (variable) | |
magnitude
| visual magnitude | 4,35 (V on UBV Johnson system) |
spectral / color information
| spectral class | B6IV |
| B-V-magnitude | -0,11 |
| U-B-magnitude | -0,46 |
| R-I-magnitude | -0,09 |
double/multiple star system information
| separation | 6 arcsec |
| mag difference (of double or brightest multiple) | 3,6 |
| note | Worley (1978) update of the IDS |
| note (category: spectroscopic binaries): | 14.1683d, K 66.7k/s, V0 +9.7k/s, asini 13.0. Possibly secondary spectrum. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 8h 7min 55,833sec | DEC: -68° 37' 0,07'' | ±0,19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0,0052 arcsec/a | DEC: 0,049 arcsec/a | source: 25 | |
| radial velocity | 10 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 281,63° | latitude: -18,56° | ||
| GCI unit vector (J2000) | X: -0,193118 | Y: 0,309262 | Z: -0,931162 | |
magnitude:
| visual | 4,35 (observed) | source: 25 |
| photovisual | 4,2 | source: 16 |
| photographic | 4,3 | source: 2 |
spectral information:
| spectral class | B5 | source: 96 | |
| Morgan-Keenan | B6IV | source: 25 | |
| B-magnitude | 4,24 ±0,05 | B-V-magnitude | -0,11 |
| U-magnitude | 3,78 ±0,05 | U-B-magnitude | -0,46 |
double/multiple star system information:
| separation between brightest and second brightest component | 5,4 arcsec |
| magnitude difference between brightest and second brightest component | 3,6 |
| position angle | 23 ° |
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: 8h 7min 46,613sec | DEC: -68° 28' 12,53'' | ±0,024 arcsec |
| position (J2000) | RA: 8h 7min 55,807sec | DEC: -68° 37' 1,89'' | |
| proper motion J1950 (FK4) | RA: -0,0042 arcsec/a | DEC: 0,021 arcsec/a | ±0,005 arcsec/a in RA ±0,004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0,0048 arcsec/a | DEC: 0,025 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,5 (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. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 11098 |
| Durchmusterung | CP-68 736 |
| Boss General Catalogue | 11098 |
| Henry Draper Catalogue | 68520 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 8h 7,9min | DEC: -68° 37' |
| proper motion (J2000) | RA: -0,03 arcsec/a | DEC: 0,029 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 |
| - | 1835 | 10 | 23° | 6,7'' | 4,5 | 8,1 | B6IV | RMK 7 |
| 1991 | - | 5,4'' |
discoverer information:
| discoverer code | discoverer | reference |
| RMK 7 | - | - |
notes:
| note | Epsilon Vol. A is a spectroscopic binary. |