HR 4588
catalogues and names
| catalogues and names | HR 4588, HD 104307, SAO 180374, BD -21 3443, WDS 12007-2150 |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 12h 0min 42.5sec | DEC: -21° 50' 14'' | ||
| position (B1900) | RA: 11h 55min 35.3sec | DEC: -21° 16' 50'' | ||
| proper motion (J2000) | RA: 0.028 arcsec/a | DEC: 0.006 arcsec/a | ||
| radial velocity | 4 km/s note: variable radial velocity |
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| galactic coordinates | longitude: 287.61° | latitude: 39.52° | ||
magnitude
| visual magnitude | 6.28 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0IV |
| B-V-magnitude | 1.22 |
double/multiple star system information
| separation | 11.7 arcsec |
| mag difference (of double or brightest multiple) | 7.1 |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 12h 0min 42.246sec | DEC: -21° 50' 14.82'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0001 arcsec/a | DEC: -0.003 arcsec/a | source: 25 | |
| radial velocity | 4 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 287.62° | latitude: 39.52° | ||
magnitude:
| visual | 6.28 (observed) | source: 25 |
| photovisual | 6.5 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K0IV | source: 25 | |
| B-magnitude | 7.5 ±0.05 | B-V-magnitude | 1.22 |
double/multiple star system information:
| separation between brightest and second brightest component | 11.7 arcsec |
| magnitude difference between brightest and second brightest component | 7.2 |
| position angle | 148 ° |
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: 11h 58min 8.718sec | DEC: -21° 33' 31.49'' | ±0.068 arcsec |
| position (J2000) | RA: 12h 0min 42.506sec | DEC: -21° 50' 13.56'' | |
| proper motion B1950 (FK4) | RA: 0.0018 arcsec/a | DEC: 0.001 arcsec/a | ±0.012 arcsec/a in RA ±0.011 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.002 arcsec/a | DEC: 0.006 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 6.4 (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: 16420 |
| Durchmusterung | BD-21 3443 |
| Boss General Catalogue | 16420 |
| Henry Draper Catalogue | 104307 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 12h 0.7min | DEC: -21° 50' |
| proper motion (J2000) | RA: -0.007 arcsec/a | DEC: -0.003 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 |
| - | 1889 | 4 | 148° | 11.7'' | 6.28 | 13.5 | K0IV | BU 1079 |
discoverer information:
| discoverer code | discoverer | reference |
| BU 1079 | Burnham, S.W. | - |