Mintaka
| catalogues and names | Mintaka, d Ori, del Ori, 34 Ori, HR 1852, HD 36486, SAO 132220, FK5: 206, WDS 05320-0018A |
| other names | Mintika |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
| note (category: star names): | MINTAKA; Mintika. |
position, motion, parallax:
| position (J2000) | RA: 5h 32min 0,4sec | DEC: -0° 17' 57'' |
| position (J1900) | RA: 5h 26min 53,8sec | DEC: -0° 22' 23'' |
| proper motion (J2000) | RA: 0,001 arcsec/a | DEC: -0,002 arcsec/a |
| radial velocity | 16 km/s note: spectroscopic binaries note: orbital data avaible |
|
| rotational velocity | 152 km/s (uncertain) (variable) | |
| trigonometric parallax | 0,014 arcsec | |
| note (category: radial and/or rotational velocities): | Mass ejection at up to 1800k/s. |
magnitude
| visual magnitude | 2,23 (V on UBV Johnson system) |
spectral / color information
| spectral class | O9.5II |
| B-V-magnitude | -0,22 |
| U-B-magnitude | -1,05 |
| R-I-magnitude | -0,22 |
| note (category: spectra): | Nitrogen deficient. Interstellar Lyman alpha absorption observed by AEROBEE rocket. Also classified B2V, O9.5II, O9.5II-III + B0III. |
| note (category: colors): | Color excess E(B-V) = +0.07. |
variability information
| variable star identification | Del Ori |
| note (category: variability): | ADS 4134A, EA 2.14 - 2.26V, 1.94 - 2.13B, 5.732476d. Intrinsic variability also possible. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 51,7 arcsec |
| mag difference (of double or brightest multiple) | 4,6 |
| component ID | AC |
| note (category: double and multiple data): | Binary with C = HR 1851. Component B, 14.0v at 33". |
| note (category: spectroscopic binaries): | ADS 4134A, 5.7324d, K 101.0k/s, V0 +20.1k/s, asini 7.92. The first SB in which stationary lines were observed. |
miscellaneous information
| note (category: group membership): | Ori OB1b3; Orion belt; cluster CR 70. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 5h 32min 0,398sec | DEC: -0° 17' 56,88'' | ±0,06 arcsec | source: 15 |
| proper motion (J2000) | RA: 0,0001 arcsec/a | DEC: -0,002 arcsec/a | source: 25 | |
| radial velocity | 16 km/s | source: 25 | ||
| trigonometric parallax | 0,014 | ±0,001 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 203,86° | latitude: -17,74° | ||
| GCI unit vector (J2000) | X: 0,121839 | Y: 0,992536 | Z: -0,005221 | |
magnitude:
| visual | 2,1 (observed) | source: 31 |
| photovisual | 2,5 | source: 2 |
spectral information:
| spectral class | B0 | source: 96 | |
| Morgan-Keenan | O9.5II | source: 25 | |
| B-magnitude | 2,01 ±0,05 | B-V-magnitude | -0,22 |
| U-magnitude | 0,96 ±0,05 | U-B-magnitude | -1,05 |
variability information:
| variability type | 10 |
| var. amplitude | 0,12 |
| var. period | 5,73 |
| var. epoch | 2443873 30. December 1978, 12:00:00 UT |
| next max light | 2451625,69 22. March 2000, 04:33:36 UT |
double/multiple star system information:
| separation between brightest and second brightest component | 0,3 arcsec |
| magnitude difference between brightest and second brightest component | 0,1 |
| position angle | 138 ° |
| component | magnitude | spectral class | catalogue(s)/name(s) |
| A | 2,1 | B0 | Mintaka, d Orionis, 34 Ori, HR 1852, HD 36486, SAO 132220 |
| B | 6,85 | B0 | d Orionis, 34 Ori, HR 1851, HD 36485, SAO 132221 |
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 | |
| 30 | GCVS, 4th edition |
| Kholopov, P.N., et al., General Catalogue of Variable Stars, fourth edition, Moscow: Nauka Publishing House, 1985-88 | |
| 31 | CRM' (non-GCVS variable data) |
| Warren, W.H. Jr., Northern Hemisphere Catalog of Red Magnitudes, 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 29min 27,017sec | DEC: -0° 20' 4,41'' | ±0,003 arcsec |
| position (J2000) | RA: 5h 32min 0,397sec | DEC: -0° 17' 56,81'' | |
| proper motion J1950 (FK4) | RA: -0,0002 arcsec/a | DEC: -0,001 arcsec/a | ±0,001 arcsec/a in RA ±0,001 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0,0001 arcsec/a | DEC: -0,002 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 2,5 (accuracy: 2 decimals) |
| source of visual magnitude data | Taken from the "Henry Draper Catalogue". |
spectral information:
| spectral class | B0 |
| source of spectral data | Taken from the Henry Draper Catalogue or no spectrum in source catalog. |
catalogues
| source catalogue | FK4, catalogue number: 206 |
| Durchmusterung | BD-00 983 |
| Boss General Catalogue | 6847 |
| Henry Draper Catalogue | 36486 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 5h 32min | DEC: -0° 18' |
| proper motion (J2000) | RA: 0,001 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 |
| Aa | 1978 | 21 | 144° | 0,2'' | 3,2 | 3,3 | B0III+O9V | HEI 42 |
| 1991 | 138° | 0,3'' | ||||||
| Aa-B | 1878 | 5 | 227° | 32,8'' | 2,24 | 14 | - | BU 558 |
| Aa-C | 1822 | 22 | ° | 52,5'' | 2,24 | 6,84 | B4 | STF 14 |
discoverer information:
| discoverer code | discoverer | reference |
| HEI 42 | - | |
| BU 558 | Burnham, S.W. | - |
| STF 14 | Struve, F.G.W. | - |
notes:
| note | Delta Ori. A is an Algol-type system, as well as a close visual binary. C is a spectroscopic binary. |
data from Combined General Catalogue of Variable Stars (Vol. I-III) (Kholopov+ 1998)
position:
| position (J1950) | RA: 5h 29min 27sec | DEC: -0° 20' 4'' |
variability informations:
| variability type | EA/DM | close binary eclipsing system |
| magnitute at max. brightness | 2,14 | |
| magnitute at min. brightness | 2,26 | |
| photometric system | visual, photovisual or Johnson's V | |
| epoch for maximum light [JD] | 2443872,589 30. December 1978, 02:08:10 UT |
|
| period [d] | 5,732476 | |
| next maximum light [JD] | 2451622,896552 19. March 2000, 09:31:02 UT |
|
| duration of the eclipse | 13 % of period the duration of the light constancy phase at minimum light is equal to zero |
spectral information
| spectral class | O9.5II-III+B0III |
references
| to a study | Vol. II GCVS |
| to a chart/photograph | Vol. I GCVS (see Kholopov et al. 1985-1988) |
miscanellous
| ID in the GCVS catalogue | 60/9004 |
| constellation | Orion |
| notes on existence | The star is equivalent to '0609005 eps'. |
| There are notes in published catalog. | |
variability type description
| variability type | description |
| EA | Eclipsing binary systems. These are binary systems with orbital planes so close to the observer's line of sight (the inclination i of the orbital plane to the plane orthogonal to the line of sight is close to 90 deg) that the components periodically eclipse each other. Consequently, the observer finds changes of the apparent combined brightness of the system with the period coincident with that of the components' orbital motion. EA Algol (Beta Persei)-type eclipsing systems. Binaries with spherical or slightly ellipsoidal components. It is possible to specify, for their light curves, the moments of the beginning and end of the eclipses. Between eclipses the light remains almost constant or varies insignificantly because of reflection effects, slight ellipsoidality of components, or physical variations. Secondary minima may be absent. An extremely wide range of periods is observed, from 0.2 to >= 10000 days. Light amplitudes are also quite different and may reach several magnitudes. EB Beta Lyrae-type eclipsing systems. These are eclipsing systems having ellipsoidal components and light curves for which it is impossible to specify the exact times of onset and end of eclipses because of a continuous change of a system's apparent combined brightness between eclipses; secondary minimum is observed in all cases, its depth usually being considerably smaller than that of the primary minimum; periods are mainly longer than 1 day. The components generally belong to early spectral types (B-A). Light amplitudes are usually <2 mag in V. EW W Ursae Majoris-type eclipsing variables. These are eclipsers with periods shorter than 1 days, consisting of ellipsoidal components almost in contact and having light curves for which it is impossible to specify the exact times of onset and end of eclipses. The depths of the primary and secondary minima are almost equal or differ insignificantly. Light amplitudes are usually <0.8 mag in V. The components generally belong to spectral types F-G and later. |
| DM | Detached main-sequence systems. Both components are main-sequence stars and do not fill their inner Roche lobes. |