u Velorum
catalogues and names
| catalogues and names | u Vel, HR 3898, HD 85355, SAO 221523, CD -45 5470, WDS 09500-4544A |
| constellation | Vela |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 9h 49min 57.1sec | DEC: -45° 43' 58'' | ||
| position (B1900) | RA: 9h 46min 4.1sec | DEC: -45° 15' 57'' | ||
| proper motion (J2000) | RA: -0.026 arcsec/a | DEC: 0.004 arcsec/a | ||
| radial velocity | 12 km/s | |||
| rotational velocity | 130 km/s | |||
| galactic coordinates | longitude: 272.95° | latitude: 6.31° | ||
magnitude
| visual magnitude | 5.08 (V on UBV Johnson system) |
spectral / color information
| spectral class | B7III |
| B-V-magnitude | -0.1 |
double/multiple star system information
| separation | 66.6 arcsec |
| mag difference (of double or brightest multiple) | 4.5 |
| note | Worley (1978) update of the IDS |
| note (category: double and multiple data): | Secondary B9. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 9h 49min 57.194sec | DEC: -45° 43' 57.98'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0017 arcsec/a | DEC: 0.009 arcsec/a | source: 25 | |
| radial velocity | 12 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 272.95° | latitude: 6.31° | ||
magnitude:
| visual | 5.08 (observed) | source: 25 |
| photovisual | 5.3 | source: 16 |
| photographic | 5.2 | source: 2 |
spectral information:
| spectral class | B8 | source: 96 | |
| Morgan-Keenan | B7III | source: 25 | |
| B-magnitude | 4.98 ±0.05 | B-V-magnitude | -0.1 |
double/multiple star system information:
| separation between brightest and second brightest component | 66.5 arcsec |
| magnitude difference between brightest and second brightest component | 4.7 |
| position angle | 47 ° |
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 (B1950) | RA: 9h 48min 0.448sec | DEC: -45° 29' 55.44'' | ±0.03 arcsec |
| position (J2000) | RA: 9h 49min 57.122sec | DEC: -45° 43' 58.25'' | |
| proper motion B1950 (FK4) | RA: -0.003 arcsec/a | DEC: 0.002 arcsec/a | ±0.007 arcsec/a in RA ±0.005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0025 arcsec/a | DEC: 0.004 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B8 |
| 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: 13547 |
| Durchmusterung | CD-45 5470 |
| Boss General Catalogue | 13547 |
| Henry Draper Catalogue | 85355 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 9h 50min | DEC: -45° 44' |
| proper motion (J2000) | RA: -0.02 arcsec/a | DEC: 0.005 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 |
| - | 1913 | 2 | 47° | 66.5'' | 5.08 | 9.8 | B7III | HJ 4254 |
discoverer information:
| discoverer code | discoverer | reference |
| HJ 4254 | Herschel, J. | - |
notes:
| note | B is CD-45@5471. |