32 Orionis
catalogues and names
| catalogues and names | 32 Ori, HR 1839, HD 36267, SAO 112849, BD +5 939, WDS 05308+0557 |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 5h 30min 47.1sec | DEC: +5° 56' 53'' | ||
| position (B1900) | RA: 5h 25min 25.9sec | DEC: +5° 52' 19'' | ||
| proper motion (J2000) | RA: 0.012 arcsec/a | DEC: -0.034 arcsec/a | ||
| radial velocity | 19 km/s note: suspected variable radial velocity |
|||
| rotational velocity | 176 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.005 arcsec | |||
| galactic coordinates | longitude: 198.02° | latitude: -14.94° | ||
| note (category: dynamical parallaxes): | 0.008". |
magnitude
| visual magnitude | 4.2 (V on UBV Johnson system) |
spectral / color information
| spectral class | B5V |
| B-V-magnitude | -0.14 |
| U-B-magnitude | -0.55 |
| R-I-magnitude |
double/multiple star system information
| separation | 0.9 arcsec |
| mag difference (of double or brightest multiple) | 1.3 |
| note (category: double and multiple data): | 4.49 B5IV, 5.82 B7V, 586y, a = 1.293". Combined mag. and colors. |
miscellaneous information
| note (category: group membership): | Cas-Tau OB1; member of Pleiades group. Field of Ori OB1a but probably not member. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 30min 47.079sec | DEC: +5° 56' 52.62'' | ±0.43 arcsec | source: 16 |
| proper motion (J2000) | RA: 0.0008 arcsec/a | DEC: -0.048 arcsec/a | source: 25 | |
| radial velocity | 19 km/s | source: 25 | ||
| trigonometric parallax | 0.005 arcsec | - | source: 25 | |
| galactic coord. (B1950) | longitude: 198.03° | latitude: -14.94° | ||
magnitude:
| visual | 4.2 (observed) | source: 25 |
| photovisual | 4.3 | source: 2 |
| photographic | 4 | source: 16 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B5V | source: 25 | |
| B-magnitude | 4.06 ±0.05 | B-V-magnitude | -0.14 |
| U-magnitude | 3.51 ±0.05 | U-B-magnitude | -0.55 |
double/multiple star system information:
| separation between brightest and second brightest component | 1.1 arcsec |
| magnitude difference between brightest and second brightest component | 1.2 |
| position angle | 47 ° |
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 | |
| 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: 5h 28min 6.426sec | DEC: +5° 54' 41.72'' | ±0.018 arcsec |
| position (J2000) | RA: 5h 30min 47.085sec | DEC: +5° 56' 53.24'' | |
| proper motion B1950 (FK4) | RA: 0.0006 arcsec/a | DEC: -0.033 arcsec/a | ±0.003 arcsec/a in RA ±0.002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0008 arcsec/a | DEC: -0.034 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.3 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from Harvard or San Luis photometry. |
spectral information:
| spectral class | B3 |
| 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: 6813 |
| Durchmusterung | BD+05 939 |
| Boss General Catalogue | 6813 |
| Henry Draper Catalogue | 36267 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 30.8min | DEC: +5° 57' |
| proper motion (J2000) | RA: 0.003 arcsec/a | DEC: -0.033 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 |
| - | 1830 | often | 204° | 1'' | 4.5 | 5.7 | B5V | STF 728 |
| 1992 | 47° | 1.1'' |
discoverer information:
| discoverer code | discoverer | reference |
| STF 728 | Struve, F.G.W. | - |
notes:
| note | 32 Ori. A premature orbit has been computed. The motion is nearly rectilinear. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 5h 25.4min | DEC: +5° 52' |
magnitudes, spectral classes, orbital elements:
| author: | L. Siegrist |
| date of observation: | 1950 |
| magnitude of component A: | 4.49 |
| magnitude of component B: | 4.49 |
| spectral class component B: | B5V |
| spectral class component B: | B5V |
| period [y]: | 586 |
| semi-major axis [arcsec]: | 1.293 |
| inclination [deg]: | 101.63 |
| node [deg]: | 36.35 |
| eccentricity: | 0.145 |
| time of periastron passage: | 2005 |
| dates of ephemeris: | 1952-1960 |
| grade: | indeterminate |
| reference: | Urania 36, 155; 1951. |
| notes | The motion is still practically rectilinear, as represented in formulae by van den Bos (Union Obs. Circ. 6, 278; 1956) and Cester (Mem. Soc. Astron. Ital. 35, 337; 1964). |
| other name(s) | STF 728, 32 Ori |