75 Orionis
catalogues and names
| catalogues and names | 75 Ori, HR 2247, HD 43525, SAO 113675, BD +9 1173, FK5: 2480, WDS 06171+0957A |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 6h 17min 6.6sec | DEC: +9° 56' 33'' | ||
| position (B1900) | RA: 6h 11min 35.8sec | DEC: +9° 58' 44'' | ||
| proper motion (J2000) | RA: 0.007 arcsec/a | DEC: -0.061 arcsec/a | ||
| radial velocity | 12 km/s | |||
| rotational velocity | 192 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.013 arcsec | |||
| galactic coordinates | longitude: 200.16° | latitude: -2.99° | ||
| note (category: dynamical parallaxes): | 0.020". |
magnitude
| visual magnitude | 5.39 (V on UBV Johnson system) |
spectral / color information
| spectral class | A2V |
| B-V-magnitude | 0.1 |
| U-B-magnitude | 0.09 |
double/multiple star system information
| number of components of multiple star system | 5 |
| separation | 0.1 arcsec |
| mag difference (of double or brightest multiple) | 0.2 |
| component ID | AP |
| note (category: double and multiple data): | AP 6.1 A2IV, 9.0y, a = 0.109". B and C both 8.4v at 63" and 117", both optical. D, 11v at 5" from C. AP resolved by speckle interferometry 1983.93, sep. 0.06". Aa resolved by speckle interferometry 1983.93, but unresolved 1983.94. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 6h 17min 6.617sec | DEC: +9° 56' 32.54'' | ±0.22 arcsec | source: 15 |
| proper motion (J2000) | RA: 0.0005 arcsec/a | DEC: -0.061 arcsec/a | source: 25 | |
| radial velocity | 12 km/s | source: 25 | ||
| trigonometric parallax | 0.013 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 200.17° | latitude: -2.99° | ||
magnitude:
| visual | 5.39 (observed) | source: 25 |
| photovisual | 5.3 | source: 2 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A2V | source: 25 | |
| B-magnitude | 5.49 ±0.05 | B-V-magnitude | 0.1 |
| U-magnitude | 5.58 ±0.05 | U-B-magnitude | 0.09 |
double/multiple star system information:
| separation between brightest and second brightest component | 63 arcsec |
| magnitude difference between brightest and second brightest component | 4.7 |
| position angle | 260 ° |
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 14min 21.142sec | DEC: +9° 57' 44.32'' | ±0.02 arcsec |
| position (J2000) | RA: 6h 17min 6.582sec | DEC: +9° 56' 32.45'' | |
| proper motion B1950 (FK4) | RA: 0 arcsec/a | DEC: -0.063 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0001 arcsec/a | DEC: -0.063 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 5.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | A2 |
| 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: 8051 |
| Durchmusterung | BD+09 1173 |
| Boss General Catalogue | 8051 |
| Henry Draper Catalogue | 43525 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 6h 17.1min | DEC: +9° 57' |
| proper motion (J2000) | RA: 0.007 arcsec/a | DEC: -0.061 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 |
| Aa | 1954 | 45 | ° | '' | 6.1 | 6.1 | A2V | FIN 331 |
| Aa-B | 1892 | 5 | 255° | 62.9'' | 5.4 | 10.1 | A2 | BU 96 |
| 1959 | 260° | 63'' | ||||||
| Aa-C | 1892 | 5 | 159° | 119.9'' | 5.4 | 11.8 | A2 | BU 96 |
| 1976 | - | 114.6'' | ||||||
| CD | 1877 | 10 | 227° | 5'' | 8.4 | 10.9 | - | J 408 |
discoverer information:
| discoverer code | discoverer | reference |
| FIN 331 | Finsen, W.S. | - |
| BU 96 | Burnham, S.W. | - |
| J 408 | Jonckheere, R. | - |
notes:
| note | 75 Ori. Aa: P = 9.20yr., a = 0.090", motion direct. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 6h 11.6min | DEC: +9° 59' |
magnitudes, spectral classes, orbital elements:
| author: | W.S. Finsen |
| date of observation: | 1976 |
| magnitude of component A: | 6.1 |
| magnitude of component B: | 6.1 |
| spectral class component B: | A2V |
| spectral class component B: | A2V |
| period [y]: | 9 |
| semi-major axis [arcsec]: | 0.109 |
| inclination [deg]: | 59.6 |
| node [deg]: | 135.2 |
| eccentricity: | 0.23 |
| time of periastron passage: | 1967.27 |
| grade: | reliable |
| reference: | Circ. Inf. No. 74, 1978. |
| notes | This pair and the distant optical companions B and C form BU 96. The pair CD, 2' distant, is J 408 (5"). |
| other name(s) | FIN 331 Aa, 75 Ori |