54 Herculis
catalogues and names
| catalogues and names | 54 Her, HR 6293, HD 152879, SAO 102476, BD +18 3266, WDS 16554+1826 |
| constellation | Hercules |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 16h 55min 22.2sec | DEC: +18° 26' 0'' | ||
| position (B1900) | RA: 16h 50min 58.4sec | DEC: +18° 35' 35'' | ||
| proper motion (J2000) | RA: -0.11 arcsec/a | DEC: 0.014 arcsec/a | ||
| radial velocity | 12 km/s note: suspected variable radial velocity |
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| trigonometric parallax | 0.02 arcsec | |||
| galactic coordinates | longitude: 37.86° | latitude: 33.62° | ||
magnitude
| visual magnitude | 5.35 (V on UBV Johnson system) |
spectral / color information
| spectral class | K4III |
| B-V-magnitude | 1.41 |
| U-B-magnitude | 1.66 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 2.5 arcsec |
| mag difference (of double or brightest multiple) | 4.2 |
| component ID | AB |
| note (category: double and multiple data): | AC, CPM. C, 12.5v at 93". |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 16h 55min 22.182sec | DEC: +18° 25' 59.48'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: -0.0079 arcsec/a | DEC: 0.014 arcsec/a | source: 25 | |
| radial velocity | 12 km/s | source: 25 | ||
| trigonometric parallax | 0.02 arcsec | ±0.002 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 37.87° | latitude: 33.62° | ||
magnitude:
| visual | 5.35 (observed) | source: 25 |
| photovisual | 5.6 | source: 2 |
| photographic | 6.7 | source: 16 |
spectral information:
| spectral class | K2 | source: 96 | |
| Morgan-Keenan | K4III | source: 25 | |
| B-magnitude | 6.76 ±0.05 | B-V-magnitude | 1.41 |
| U-magnitude | 8.42 ±0.05 | U-B-magnitude | 1.66 |
double/multiple star system information:
| separation between brightest and second brightest component | 2.5 arcsec |
| magnitude difference between brightest and second brightest component | 7.5 |
| position angle | 180 ° |
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 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 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: 16h 53min 10.22sec | DEC: +18° 30' 42.58'' | ±0.018 arcsec |
| position (J2000) | RA: 16h 55min 22.204sec | DEC: +18° 25' 59.85'' | |
| proper motion B1950 (FK4) | RA: -0.0078 arcsec/a | DEC: 0.012 arcsec/a | ±0.003 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: -0.0077 arcsec/a | DEC: 0.014 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.6 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | K2 |
| 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: 22816 |
| Durchmusterung | BD+18 3266 |
| Boss General Catalogue | 22816 |
| Henry Draper Catalogue | 152879 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 16h 55.4min | DEC: +18° 26' |
| proper motion (J2000) | RA: -0.111 arcsec/a | DEC: 0.01 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 |
| AB | 1879 | 18 | 175° | 2.6'' | 5.35 | 12.9 | K4III-IV | BU 954 |
| 1967 | 180° | 2.5'' | ||||||
| AC | 1913 | 2 | 314° | 96.6'' | - | - | - | FOX 196 |
| 1960 | - | 93'' |
discoverer information:
| discoverer code | discoverer | reference |
| BU 954 | Burnham, S.W. | - |
| FOX 196 | Fox, P. | - |
notes:
| note | 54 Her. |