HR 6438
catalogues and names
| catalogues and names | HR 6438, HD 156768, SAO 244678, CP -57 8478, WDS 17229-5801 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 17h 22min 55sec | DEC: -58° 0' 37'' | ||
| position (B1900) | RA: 17h 14min 17.8sec | DEC: -57° 54' 36'' | ||
| proper motion (J2000) | RA: -0.021 arcsec/a | DEC: -0.011 arcsec/a | ||
| radial velocity | -10 km/s | |||
| galactic coordinates | longitude: 333.05° | latitude: -12.07° | ||
magnitude
| visual magnitude | 5.88 (V on UBV Johnson system) |
spectral / color information
| spectral class | G8Ib-II |
| B-V-magnitude | 1.07 |
| U-B-magnitude | 0.86 |
double/multiple star system information
| separation | 2 arcsec |
| mag difference (of double or brightest multiple) | 3.6 |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 17h 22min 55.253sec | DEC: -58° 0' 37.42'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0 arcsec/a | DEC: -0.015 arcsec/a | source: 25 | |
| radial velocity | -10 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 333.06° | latitude: -12.07° | ||
magnitude:
| visual | 5.88 (observed) | source: 25 |
| photovisual | 6.1 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | G8Ib-II | source: 25 | |
| B-magnitude | 6.95 ±0.05 | B-V-magnitude | 1.07 |
| U-magnitude | 7.81 ±0.05 | U-B-magnitude | 0.86 |
double/multiple star system information:
| separation between brightest and second brightest component | 2 arcsec |
| magnitude difference between brightest and second brightest component | 3.7 |
| position angle | 187 ° |
sources:
| 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: 17h 18min 36.069sec | DEC: -57° 57' 45.32'' | ±0.045 arcsec |
| position (J2000) | RA: 17h 22min 55.045sec | DEC: -58° 0' 36.74'' | |
| proper motion B1950 (FK4) | RA: -0.0019 arcsec/a | DEC: -0.01 arcsec/a | ±0.01 arcsec/a in RA ±0.007 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0026 arcsec/a | DEC: -0.011 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.9 (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. |
remarks for duplicity and variability
| Double star in Aitken's Double Star Catalogue (Aitken 1932) |
catalogues
| source catalogue | GC, catalogue number: 23439 |
| Durchmusterung | CP-57 8478 |
| Boss General Catalogue | 23439 |
| Henry Draper Catalogue | 156768 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 17h 22.9min | DEC: -58° 1' |
| proper motion (J2000) | RA: -0.005 arcsec/a | DEC: -0.021 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 |
| - | 1900 | 4 | 187° | 2'' | 5.9 | 9.6 | G8Ib-II | HDO 270 |
discoverer information:
| discoverer code | discoverer | reference |
| HDO 270 | - | - |