HR 4639
catalogues and names
| catalogues and names | HR 4639, HD 105943, SAO 1991, BD +82 356, WDS 12110+8143A |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 12h 11min 0sec | DEC: +81° 42' 36'' | ||
| position (B1900) | RA: 12h 6min 30.2sec | DEC: +82° 15' 58'' | ||
| proper motion (J2000) | RA: -0.029 arcsec/a | DEC: 0.007 arcsec/a | ||
| radial velocity | -27 km/s note: suspected variable radial velocity |
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| galactic coordinates | longitude: 124.71° | latitude: 35.28° | ||
magnitude
| visual magnitude | 6 (V on UBV Johnson system) |
spectral / color information
| spectral class | gK5 |
| B-V-magnitude | 1.62 |
double/multiple star system information
| separation | 66.7 arcsec |
| mag difference (of double or brightest multiple) | 2 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 12h 10min 59.933sec | DEC: +81° 42' 35.6'' | ±0.35 arcsec | source: 34 |
| proper motion (J2000) | RA: -0.0133 arcsec/a | DEC: 0.001 arcsec/a | source: 25 | |
| radial velocity | -27 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 124.71° | latitude: 35.28° | ||
magnitude:
| visual | 6 (observed) | source: 25 |
| photovisual | 6.3 | source: 2 |
| photographic | 7.6 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | gK5 | source: 25 | |
| B-magnitude | 7.62 ±0.05 | B-V-magnitude | 1.62 |
double/multiple star system information:
| separation between brightest and second brightest component | 66.7 arcsec |
| magnitude difference between brightest and second brightest component | 2.5 |
| position angle | 76 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 6 | K0 | HR 4639, HD 105943, SAO 1991 |
| B | 9.22 | F5 |
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 | |
| 34 | IRS Catalog |
| Corbin, T.E., 1991, U.S. Naval Observatory, International Reference Stars Catalog | |
| 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: 12h 8min 47.058sec | DEC: +81° 59' 16.9'' | ±0.025 arcsec |
| position (J2000) | RA: 12h 10min 59.989sec | DEC: +81° 42' 36.3'' | |
| proper motion B1950 (FK4) | RA: -0.014 arcsec/a | DEC: 0.002 arcsec/a | ±0.003 arcsec/a in RA ±0.004 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0134 arcsec/a | DEC: 0.007 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | K0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | GC, catalogue number: 16641 |
| Durchmusterung | BD+82 356 |
| Boss General Catalogue | 16641 |
| Henry Draper Catalogue | 105943 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 12h 11min | DEC: +81° 43' |
| proper motion (J2000) | RA: -0.027 arcsec/a | DEC: -0.001 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 |
| - | 1876 | 8 | 76° | 66.7'' | 6 | 8.5 | gK5 | SHJ 136 |
discoverer information:
| discoverer code | discoverer | reference |
| SHJ 136 | South & Herschel | - |
notes:
| note | BDS 6074, STT (App) 118 probably same star. B is BD+82@357. Proper motion of B +012 +028. |