42 Orionis
catalogues and names
| catalogues and names | NSV 02318, 42 Ori, HR 1892, HD 37018, SAO 132320, BD -4 1185, WDS 05354-0450 |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 5h 35min 23.2sec | DEC: -4° 50' 18'' | ||
| position (B1900) | RA: 5h 30min 27.1sec | DEC: -4° 54' 14'' | ||
| proper motion (J2000) | RA: 0.004 arcsec/a | DEC: 0 arcsec/a | ||
| radial velocity | 30 km/s note: spectroscopic binaries |
|||
| rotational velocity | 71 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.006 arcsec | |||
| galactic coordinates | longitude: 208.5° | latitude: -19.11° | ||
| note (category: dynamical parallaxes): | 0.009". |
magnitude
| visual magnitude | 4.59 (V on UBV Johnson system) |
spectral / color information
| spectral class | B1V |
| B-V-magnitude | -0.19 |
| U-B-magnitude | -0.94 |
| R-I-magnitude | |
| IR-note | object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978) |
| note (category: colors): | Color excess E(B-V) = +0.05. |
variability information
| variable star identification | 2318 |
double/multiple star system information
| separation | 1.5 arcsec |
| mag difference (of double or brightest multiple) | 3.2 |
| note (category: double and multiple data): | Binary. COPERNICUS spectra and IR photometry yielded no evidence on the companion. |
miscellaneous information
| note (category: group membership): | In HII region; Ori OB1c2; sword of Orion. No emission from the nebula. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 35min 23.156sec | DEC: -4° 50' 18.11'' | ±0.19 arcsec | source: 16 |
| proper motion (J2000) | RA: 0 arcsec/a | DEC: 0 arcsec/a | source: 25 | |
| radial velocity | 30 km/s | source: 25 | ||
| trigonometric parallax | 0.006 arcsec | ±0.001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 208.51° | latitude: -19.11° | ||
magnitude:
| visual | 4.59 (observed) | source: 25 |
| photovisual | 4.3 | source: 16 |
| photographic | 4.5 | source: 2 |
spectral information:
| spectral class | B3 | source: 96 | |
| Morgan-Keenan | B1V | source: 25 | |
| B-magnitude | 4.4 ±0.05 | B-V-magnitude | -0.19 |
| U-magnitude | 3.46 ±0.05 | U-B-magnitude | -0.94 |
double/multiple star system information:
| separation between brightest and second brightest component | 1.5 arcsec |
| magnitude difference between brightest and second brightest component | 3.2 |
| position angle | 207 ° |
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 32min 55.055sec | DEC: -4° 52' 10.72'' | ±0.021 arcsec |
| position (J2000) | RA: 5h 35min 23.173sec | DEC: -4° 50' 17.88'' | |
| proper motion B1950 (FK4) | RA: -0.0001 arcsec/a | DEC: 0 arcsec/a | ±0.004 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.0003 arcsec/a | DEC: 0 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 | 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: 6934 |
| Durchmusterung | BD-04 1185 |
| Boss General Catalogue | 6934 |
| Henry Draper Catalogue | 37018 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 35.4min | DEC: -4° 50' |
| proper motion (J2000) | RA: 0 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 |
| - | 1848 | 13 | 220° | 2'' | 4.7 | 7.9 | B1V | DA 4 |
| 1968 | 207° | 1.5'' |
discoverer information:
| discoverer code | discoverer | reference |
| DA 4 | Dawes, W.R. | - |
notes:
| note | 42 Ori. |
data from Combined General Catalogue of Variable Stars (suspected variables) (Kholopov+ 1998)
position:
| position (equinox 1950.0) | RA: 5h 32min 55.1sec | DEC: -4° 52' 11'' |
variability informations:
| magnitute at max. brightness | 4.52 |
| magnitute at min. brightness | 4.62 |
| photometric system | visual, photovisual or Johnson's V |
spectral information
| spectral class | B2 |
references
| to a study | 0807D (designation: 109G ORI) |
| to a chart/photograph | 541273 |
miscanellous
| There are notes in the published catalog (Kukarkin et al.(1982)). |