m Orionis
catalogues and names
| catalogues and names | m Ori, 61 Ori, HR 2124, HD 40932, SAO 113389, BD +9 1064, WDS 06024+0939A |
| constellation | Orion |
data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)
position, motion, parallax:
| position (J2000) | RA: 6h 2min 23sec | DEC: +9° 38' 51'' | ||
| position (B1900) | RA: 5h 56min 52.8sec | DEC: +9° 38' 50'' | ||
| proper motion (J2000) | RA: 0.015 arcsec/a | DEC: -0.028 arcsec/a | ||
| radial velocity | 45 km/s note: spectroscopic binaries, single lined spectra note: orbital data avaible |
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| rotational velocity | 24 km/s (uncertain) (variable) | |||
| trigonometric parallax | 0.028 arcsec | |||
| galactic coordinates | longitude: 198.68° | latitude: -6.31° | ||
| note (category: dynamical parallaxes): | 0.023". |
magnitude
| visual magnitude | 4.12 (V on UBV Johnson system) |
spectral / color information
| spectral class | A2V |
| B-V-magnitude | 0.16 |
| U-B-magnitude | 0.11 |
| R-I-magnitude |
| note (category: spectra): | K/m indicate A3/A7, respectively. |
variability information
| variable star identification | 2792 |
| note (category: variability): | ADS 4617A, Alpha CV 4.10 - 4.18V. |
double/multiple star system information
| number of components of multiple star system | 3 |
| separation | 0.3 arcsec |
| mag difference (of double or brightest multiple) | 1.8 |
| component ID | AB |
| note (category: double and multiple data): | AB 4.4 A2V, 6.0 F3V, 17.5d, a = 0.276"; ABxP, 18.25y, a = 0.089". Magnitude and colors for combined light. A is alpha CVn var., SB1, 4.45d; B is SB2, 4.78d. Component C, 14v at 18" probably optical. |
| note (category: spectroscopic binaries): | ADS 4617A, 4.4476d, K 28.4k/s, V0 var., asini 1.74. Alternate orbit 4.4478d, K 29.2k/s, V0 +40.9k/s, asini 1.79. Speckle interferometric sep. 0.153" 1980.94; unresolved 1983.94. ADS 4617AB, 18y, K 14.9k/s, V0 +43.3k/s, asini 851. ADS 4617B is SB2, 4.78d. |
miscellaneous information
| note (category: group membership): | Mel 25; the Hyades. |
data from SKY2000 - Master Star Catalog (Myers+ 1997)
position, motion, parallax:
| position (J2000) | RA: 6h 2min 22.991sec | DEC: +9° 38' 50.19'' | ±0.2 arcsec | source: 52 |
| proper motion (J2000) | RA: 0.0003 arcsec/a | DEC: -0.042 arcsec/a | source: 25 | |
| radial velocity | 29 km/s | source: 25 | ||
| trigonometric parallax | 0.028 arcsec | ±0.003 arcsec | source: 25 | |
| galactic coord. (B1950) | longitude: 198.69° | latitude: -6.31° | ||
magnitude:
| visual | 4.12 (observed) | source: 25 |
| photovisual | 4.2 | source: 2 |
| photographic | 4.4 | source: 16 |
spectral information:
| spectral class | A2 | source: 96 | |
| Morgan-Keenan | A2V | source: 25 | |
| B-magnitude | 4.28 ±0.05 | B-V-magnitude | 0.16 |
| U-magnitude | 4.39 ±0.05 | U-B-magnitude | 0.11 |
double/multiple star system information:
| magnitude difference between brightest and second brightest component | 2.3 |
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 | |
| 52 | PPMN-HP subset |
| PPMN Star Catalogue (Reference 16) High-Precision Subset (Code H) | |
| 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 59min 37.869sec | DEC: +9° 38' 56.64'' | ±0.012 arcsec |
| position (J2000) | RA: 6h 2min 23.017sec | DEC: +9° 38' 50.83'' | |
| proper motion B1950 (FK4) | RA: 0.0009 arcsec/a | DEC: -0.028 arcsec/a | ±0.002 arcsec/a in RA ±0.003 arcsec/a in DEC |
| proper motion J2000 (FK5) | RA: 0.001 arcsec/a | DEC: -0.028 arcsec/a | |
| source of proper motion data | Determined by source catalog | ||
magnitude:
| visual | 4.2 (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: 7635 |
| Durchmusterung | BD+09 1064 |
| Boss General Catalogue | 7635 |
| Henry Draper Catalogue | 40932 |
data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
position and proper motion:
| position (J2000) | RA: 6h 2.4min | DEC: +9° 39' |
| proper motion (J2000) | RA: 0.003 arcsec/a | DEC: -0.032 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 | 1914 | 68 | ° | '' | 4.3 | 6.6 | A2V | A 2715 |
| AB-C | 1899 | 7 | 272° | 16.8'' | - | 14 | - | BU 1056 |
| 1955 | 279° | 18'' |
discoverer information:
| discoverer code | discoverer | reference |
| A 2715 | Aitken, R.G. | - |
| BU 1056 | Burnham, S.W. | - |
notes:
| note | Mu Ori. P = 18yr., a = 0.28", motion retrograde in a highly-inclined orbit. A is a variable of the Alpha CVn type, and a spectroscopic binary, P = 4.45d. |
data from 4th Catalog of Orbits of Visual Binaries (Worley+, 1983)
position:
| position (B1900) | RA: 5h 56.9min | DEC: +9° 39' |
magnitudes, spectral classes, orbital elements:
| author: | H.L. Alden | V. Osvalds |
| date of observation: | 1938 | 1953 |
| magnitude of component A: | 4.3 | |
| magnitude of component B: | 4.3 | |
| spectral class component B: | A2V | |
| spectral class component B: | A2V | |
| period [y]: | 17.5 | 18.25 |
| semi-major axis [arcsec]: | 0.276 | 0.089 |
| inclination [deg]: | 95.06 | 91.8 |
| node [deg]: | 26.26 (ascending) | 27.6 (ascending) |
| equinox of node: | 2000 | |
| eccentricity: | 0.76 | 0.76 |
| time of periastron passage: | 1929.25 | 1929.25 |
| grade: | good | |
| reference: | Astron. J. 50, 73; 1942. | Pub. McCormick Obs. 11, 175; 1964. |
| notes | Alden's orbit is visual. P, T, e in Osvald's astrometric orbit are taken from a revised visual orbit by Alden (cf Osvald's paper); the revised a = 0.254". The different types of orbits cause the longitude of the node to be in opposite quadrants. Star A is an Alpha CVn variable and a single-lined spectroscopic pair, P = 4.45 d, and star B a double-lined SB, P = 4.78 d (F. Fekel, Pub. Astron. Soc. Pacific 93, 1981). |
| other name(s) | A 2715 AB-P |