r Orionis
| catalogues and names | r Ori, NSV 01872, 17 Ori, HR 1698, HD 33856, SAO 112528, WDS 05133+0252A |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 5h 13min 17,5sec | DEC: +2° 51' 40'' |
| position (J1900) | RA: 5h 8min 3,7sec | DEC: +2° 44' 32'' |
| proper motion (J2000) | RA: 0,001 arcsec/a | DEC: -0,006 arcsec/a |
| radial velocity | 41 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible |
|
| rotational velocity | <17 km/s (uncertain) (variable) | |
| trigonometric parallax | -0,01 arcsec | |
| note (category: dynamical parallaxes): | 0.001". |
magnitude
| visual magnitude | 4,46 (V on UBV Johnson system) |
spectral / color information
| spectral class | K0.5III |
| B-V-magnitude | 1,19 |
| U-B-magnitude | 1,16 |
| R-I-magnitude | 0,59 |
| note (category: spectra): | Also classified K0.5III. |
variability information
| variable star identification | 1872 |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 6,9 arcsec |
| mag difference (of double or brightest multiple) | 3,9 |
| component ID | AB |
| note (category: double and multiple data): | AB fixed. B, 8.4v, F7V at 7"; C, 11.8 at 182". |
| note (category: spectroscopic binaries): | ADS 3797A, 1031.40d, K 8.7k/s, V0 +40.5k/s, asini 123. Unresolved by speckle interferometry. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 13min 17,487sec | DEC: +2° 51' 40,56'' | ±0,35 arcsec | source: 17 |
| proper motion (J2000) | RA: 0,0004 arcsec/a | DEC: 0,002 arcsec/a | source: 25 | |
| radial velocity | 41 km/s | source: 25 | ||
| galactic coord. (B1950) | longitude: 198,52° | latitude: -20,27° | ||
| GCI unit vector (J2000) | X: 0,202144 | Y: 0,978083 | Z: 0,049918 | |
magnitude:
| visual | 4,46 (observed) | source: 25 |
| photovisual | 4,6 | source: 2 |
| photographic | 5,8 | source: 16 |
spectral information:
| spectral class | K0 | source: 96 | |
| Morgan-Keenan | K1IIICN0.5 | source: 25 | |
| B-magnitude | 5,65 ±0,05 | B-V-magnitude | 1,19 |
| U-magnitude | 6,81 ±0,05 | U-B-magnitude | 1,16 |
double/multiple star system information:
| separation between brightest and second brightest component | 6,9 arcsec |
| magnitude difference between brightest and second brightest component | 3,8 |
| position angle | 64 ° |
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 | |
| 17 | ACRS |
| Corbin, T.E., and S.E. Urban, Astrographic Catalog Reference Stars, United States Naval Observatory, 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 (J1950) | RA: 5h 10min 40,482sec | DEC: +2° 48' 11,68'' | ±0,016 arcsec |
| position (J2000) | RA: 5h 13min 17,46sec | DEC: +2° 51' 39,83'' | |
| proper motion J1950 (FK4) | RA: -0,0002 arcsec/a | DEC: -0,005 arcsec/a | ±0,003 arcsec/a in RA ±0,002 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0 arcsec/a | DEC: -0,006 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4,6 (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: 6381 |
| Durchmusterung | BD+02 888 |
| Boss General Catalogue | 6381 |
| Henry Draper Catalogue | 33856 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 13,3min | DEC: +2° 52' |
| proper motion (J2000) | RA: 0,006 arcsec/a | DEC: 0,002 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 | 1831 | 42 | 64° | 7,1'' | 4,6 | 8,4 | K2II | STF 654 |
| 1987 | - | 6,9'' | ||||||
| AC | 1913 | 1 | 155° | 182,4'' | 4,6 | 11,8 | - | STF 654 |
discoverer information:
| discoverer code | discoverer | reference |
| STF 654 | Struve, F.G.W. | - |
notes:
| note | Rho Ori. A is a long-period spectroscopic binary, P = 1031.4d. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (J1950) | RA: 5h 10min 40,5sec | DEC: +2° 48' 12'' |
variability informations:
| magnitute at max. brightness | 4,42 |
| magnitute at min. brightness | 4,48 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | K3 |
references
| to a study | 0807D (designation: 46G ORI) |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |