74 Orionis
catalogues and names
| catalogues and names | 74 Ori, HR 2241, HD 43386, SAO 95476, BD +12 1084, FK5: 1169, WDS 06164+1216A |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 6h 16min 26.6sec | DEC: +12° 16' 20'' | ||
| position (B1900) | RA: 6h 10min 49.6sec | DEC: +12° 18' 0'' | ||
| proper motion (J2000) | RA: 0.082 arcsec/a | DEC: 0.186 arcsec/a | ||
| radial velocity | 9 km/s note: suspected variable radial velocity |
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| rotational velocity | 17 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.041 arcsec | |||
| galactic coordinates | longitude: 198.04° | latitude: -2.03° | ||
magnitude
| visual magnitude | 5.04 (V on UBV Johnson system) |
spectral / color information
| spectral class | F5IV-V |
| B-V-magnitude | 0.42 |
| U-B-magnitude | -0.02 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 204 arcsec |
| mag difference (of double or brightest multiple) | 4.2 |
| component ID | AC |
| note | Worley (1978) update of the IDS |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 6h 16min 26.617sec | DEC: +12° 16' 19.71'' | ±0.06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.0056 arcsec/a | DEC: 0.186 arcsec/a | source: 25 | |
| radial velocity | 9 km/s | source: 25 | ||
| trigonometric parallax | 0.041 arcsec | ±0.004 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 198.04° | latitude: -2.03° | ||
magnitude:
| visual | 5.04 (observed) | source: 25 |
| photovisual | 5.1 | source: 2 |
spectral information:
| spectral class | F5 | source: 96 | |
| Morgan-Keenan | F5IV-V | source: 25 | |
| B-magnitude | 5.46 ±0.05 | B-V-magnitude | 0.42 |
| U-magnitude | 5.44 ±0.05 | U-B-magnitude | -0.02 |
double/multiple star system information:
| separation between brightest and second brightest component | 29.7 arcsec |
| magnitude difference between brightest and second brightest component | 7.5 |
| position angle | 171 ° |
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 | |
| 15 | FK5, FK5 Extension and FK5 Supplement |
| Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991 | |
| 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: 6h 13min 38.093sec | DEC: +12° 17' 16.13'' | ±0.005 arcsec |
| position (J2000) | RA: 6h 16min 26.622sec | DEC: +12° 16' 19.69'' | |
| proper motion B1950 (FK4) | RA: 0.0055 arcsec/a | DEC: 0.185 arcsec/a | ±0.001 arcsec/a in RA ±0.001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0056 arcsec/a | DEC: 0.185 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.1 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | F5 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 1169 |
| Durchmusterung | BD+12 1084 |
| Boss General Catalogue | 8033 |
| Henry Draper Catalogue | 43386 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 6h 16.4min | DEC: +12° 16' |
| proper motion (J2000) | RA: 0.082 arcsec/a | DEC: 0.186 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 | 1958 | 2 | 163° | 24'' | 5.04 | 12.5 | F5IV-V | KUI 26 |
| 1989 | 171° | 29.7'' | ||||||
| AC | 1909 | 2 | 88° | 204'' | 5.04 | 9.3 | - | LAU |
| 1922 | 89° | 202.8'' |
discoverer information:
| discoverer code | discoverer | reference |
| KUI 26 | Kuiper, G.P. | (Astrophys. J. 84, 478; 1936.) |
| LAU | Lau, H.E. |
notes:
| note | 74 Ori. |