HR 1778
catalogues and names
| catalogues and names | HR 1778, HD 35281, SAO 132053, BD -8 1107, WDS 05233-0825 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 5h 23min 18.5sec | DEC: -8° 24' 57'' | ||
| position (B1900) | RA: 5h 18min 30.7sec | DEC: -8° 30' 36'' | ||
| proper motion (J2000) | RA: 0.003 arcsec/a | DEC: -0.016 arcsec/a | ||
| radial velocity | 15 km/s note: variable radial velocity |
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| rotational velocity | 119 km/s (uncertain) (variable) | |||
| dynamical parallax | 0.013 arcsec | |||
| galactic coordinates | longitude: 210.5° | latitude: -23.39° | ||
magnitude
| visual magnitude | 5.9 (V on UBV Johnson system) |
spectral / color information
| spectral class | B8III |
| B-V-magnitude | -0.03 |
| U-B-magnitude | -0.36 |
double/multiple star system information
| separation | 6 arcsec |
| mag difference (of double or brightest multiple) | 1.7 |
| note (category: double and multiple data): | Companion A5IV, vsini 124k/s. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 23min 18.562sec | DEC: -8° 24' 57.34'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: -0.0002 arcsec/a | DEC: -0.009 arcsec/a | source: 25 | |
| radial velocity | 15 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 210.5° | latitude: -23.39° | ||
magnitude:
| visual | 5.9 (observed) | source: 25 |
| photovisual | 6.1 | source: 16 |
| photographic | 5.8 | source: 2 |
spectral information:
| spectral class | A0 | source: 96 | |
| Morgan-Keenan | B8III | source: 25 | |
| B-magnitude | 5.87 ±0.05 | B-V-magnitude | -0.03 |
| U-magnitude | 5.51 ±0.05 | U-B-magnitude | -0.36 |
double/multiple star system information:
| separation between brightest and second brightest component | 6 arcsec |
| magnitude difference between brightest and second brightest component | 2 |
| position angle | 140 ° |
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: 5h 20min 54.562sec | DEC: -8° 27' 41.42'' | ±0.038 arcsec |
| position (J2000) | RA: 5h 23min 18.539sec | DEC: -8° 24' 57.22'' | |
| proper motion B1950 (FK4) | RA: -0.0002 arcsec/a | DEC: -0.017 arcsec/a | ±0.007 arcsec/a in RA ±0.005 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0002 arcsec/a | DEC: -0.016 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 | A0 |
| 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: 6629 |
| Durchmusterung | BD-08 1107 |
| Boss General Catalogue | 6629 |
| Henry Draper Catalogue | 35281 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 23.3min | DEC: -8° 25' |
| proper motion (J2000) | RA: -0.005 arcsec/a | DEC: -0.011 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 |
| - | 1830 | 22 | 146° | 6'' | 6.2 | 8.2 | B8III | STF 701 |
| 1973 | 140° | - |
discoverer information:
| discoverer code | discoverer | reference |
| STF 701 | Struve, F.G.W. | - |