μ Orionis (Latinised to Mu Orionis, abbreviated to μ Ori or Mu Ori) is a quadruple star system[6] in the constellation Orion, similar to Mizar and Epsilon Lyrae with combined visual magnitude of 4.13. The four stars are known as Mu Orionis Aa, Mu Orionis Ab, Mu Orionis Ba, and Mu Orionis Bb. The A and B systems are several tenths of an arcsecond apart. The entire system is located approximately 150 light years from the Sun.
Mu Orionis Ab is a G5V dwarf orbiting Aa at a distance of 0.077 AU, 0.2x the orbit of Mercury.
Mu Orionis Ba and Bb are F5V dwarfs with 1.4 solar masses and apparent magnitudes of 6.91. They are separated from each other by 0.078 AU.
μ Orionis falls just outside an unrelated planetary nebulaAbell 12. The bright star makes detecting the faint nebula difficult and it has been nicknamed The Hidden.[citation needed]
Referencesedit
^ abcdFabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002). "The Tycho double star catalogue". Astronomy and Astrophysics. 384: 180–189. Bibcode:2002A&A...384..180F. doi:10.1051/0004-6361:20011822.
^ abMason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
^ abcdefFekel, Francis C.; Scarfe, C. D.; Barlow, D. J.; Hartkopf, William I.; Mason, Brian D.; McAlister, Harold A. (2002). "The Quadruple System μ Orionis: Three-dimensional Orbit and Physical Parameters". The Astronomical Journal. 123 (3): 1723. Bibcode:2002AJ....123.1723F. doi:10.1086/339184.
^Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727–732. arXiv:astro-ph/0406573. Bibcode:2004A&A...424..727P. doi:10.1051/0004-6361:20041213. S2CID 119387088.
^ abVan Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^ abcdefMuterspaugh, Matthew W.; et al. (2008). "Masses, Luminosities, and Orbital Coplanarities of the μ Orionis Quadruple-Star System from Phases Differential Astrometry". The Astronomical Journal. 135 (3): 766–776. arXiv:0710.2126. Bibcode:2008AJ....135..766M. doi:10.1088/0004-6256/135/3/766. S2CID 6531922.
^Fekel, Francis C. (2003). "Rotational Velocities of B, A, and Early-F Narrow-lined Stars". The Publications of the Astronomical Society of the Pacific. 115 (809): 807–810. Bibcode:2003PASP..115..807F. doi:10.1086/376393.
^Piccotti, Luca; Docobo, José Ángel; Carini, Roberta; Tamazian, Vakhtang S.; Brocato, Enzo; Andrade, Manuel; Campo, Pedro P. (2020). "A study of the physical properties of SB2s with both the visual and spectroscopic orbits". Monthly Notices of the Royal Astronomical Society. 492 (2): 2709. Bibcode:2020MNRAS.492.2709P. doi:10.1093/mnras/stz3616.
orionis, orionis, latinised, abbreviated, quadruple, star, system, constellation, orion, similar, mizar, epsilon, lyrae, with, combined, visual, magnitude, four, stars, known, systems, several, tenths, arcsecond, apart, entire, system, located, approximately, . m Orionis Latinised to Mu Orionis abbreviated to m Ori or Mu Ori is a quadruple star system 6 in the constellation Orion similar to Mizar and Epsilon Lyrae with combined visual magnitude of 4 13 The four stars are known as Mu Orionis Aa Mu Orionis Ab Mu Orionis Ba and Mu Orionis Bb The A and B systems are several tenths of an arcsecond apart The entire system is located approximately 150 light years from the Sun m OrionisLocation of m Ori circled Observation dataEpoch J2000 Equinox J2000 Constellation Orion m Ori A Right ascension 06h 02m 22 997s 1 Declination 09 38 50 24 1 Apparent magnitude V 4 30 2 m Ori B Right ascension 06h 02m 23 009s 1 Declination 09 38 50 52 1 Apparent magnitude V 6 27 2 Characteristics m Ori A Spectral type A1 Vm U B color index 0 11 3 B V color index 0 14 3 m Ori B Spectral type F2 V U B color index 0 00 3 B V color index 0 43 3 AstrometryRadial velocity Rv 0 00 4 km sProper motion m RA 10 43 5 mas yr Dec 39 09 5 mas yrParallax p 21 69 0 13 mas 6 Distance150 4 0 9 ly 46 1 0 3 pc Absolute magnitude MV Aa 0 93Ba 3 53Bb 3 53 3 Orbit 6 Primarym Ori ACompanionm Ori BPeriod P 6 813 8 1 2 dSemi major axis a 0 2737 0 0021 12 620 0 057 AU Eccentricity e 0 7410 0 0011Inclination i 96 028 0 028 Orbit 6 Primarym Ori AaCompanionm Ori AbPeriod P 4 4475849 daysSemi major axis a 0 001661 0 000013 0 07659 0 00058 AU Eccentricity e 0 0037 0 0014Inclination i 47 1 9 0 Semi amplitude K1 primary 1 03 0 26 km sSemi amplitude K2 secondary gt 4 58 km s Orbit 6 Primarym Ori BaCompanionm Ori BbPeriod P 4 7835349 daysSemi major axis a 0 001688 0 000013 0 07659 0 00036 AU Eccentricity e 0 0016 0 0014Inclination i 110 71 0 73 Semi amplitude K1 primary 1 72 0 26 km sSemi amplitude K2 secondary 2 02 0 26 km s Details 3 6 m Ori AaMass2 38 M Radius2 85 R Luminosity32 2 L Temperature8 300 KRotational velocity v sin i 10 7 km sAge282 8 Myrm Ori AbMass0 652 M m Ori BaMass1 389 M Radius1 33 R Luminosity3 0 L Temperature6 600 Km Ori BbMass1 356 M Radius1 33 R Luminosity3 0 L Temperature6 600 K Other designationsMu Orionis Mu Ori m Orionis m Ori 61 Orionis 61 Ori HR 2124 HD 40932 HIP 28614 BD 09 1064 ADS 4617 WDS J06024 0939 2MASS J05351889 0516140 Database referencesSIMBADdatadata2data3 Mu Orionis Aa is an A5V dwarf and metallic line star of effective temperature 8 350 Kelvin and apparent magnitude of 4 31 Mu Orionis Aa has 2 1 solar masses and a radius of 2 9 R and a luminosity 32 times that of the Sun Mu Orionis Ab is a G5V dwarf orbiting Aa at a distance of 0 077 AU 0 2x the orbit of Mercury Mu Orionis Ba and Bb are F5V dwarfs with 1 4 solar masses and apparent magnitudes of 6 91 They are separated from each other by 0 078 AU m Orionis falls just outside an unrelated planetary nebula Abell 12 The bright star makes detecting the faint nebula difficult and it has been nicknamed The Hidden citation needed References edit a b c d Fabricius C Hog E Makarov V V Mason B D Wycoff G L Urban S E 2002 The Tycho double star catalogue Astronomy and Astrophysics 384 180 189 Bibcode 2002A amp A 384 180F doi 10 1051 0004 6361 20011822 a b Mason Brian D Wycoff Gary L Hartkopf William I Douglass Geoffrey G Worley Charles E 2001 The 2001 US Naval Observatory Double Star CD ROM I The Washington Double Star Catalog The Astronomical Journal 122 6 3466 Bibcode 2001AJ 122 3466M doi 10 1086 323920 a b c d e f Fekel Francis C Scarfe C D Barlow D J Hartkopf William I Mason Brian D McAlister Harold A 2002 The Quadruple System m Orionis Three dimensional Orbit and Physical Parameters The Astronomical Journal 123 3 1723 Bibcode 2002AJ 123 1723F doi 10 1086 339184 Pourbaix D Tokovinin A A Batten A H Fekel F C Hartkopf W I Levato H Morrell N I Torres G Udry S 2004 SB9 The ninth catalogue of spectroscopic binary orbits Astronomy and Astrophysics 424 2 727 732 arXiv astro ph 0406573 Bibcode 2004A amp A 424 727P doi 10 1051 0004 6361 20041213 S2CID 119387088 a b Van Leeuwen F 2007 Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653 664 arXiv 0708 1752 Bibcode 2007A amp A 474 653V doi 10 1051 0004 6361 20078357 S2CID 18759600 a b c d e f Muterspaugh Matthew W et al 2008 Masses Luminosities and Orbital Coplanarities of the m Orionis Quadruple Star System from Phases Differential Astrometry The Astronomical Journal 135 3 766 776 arXiv 0710 2126 Bibcode 2008AJ 135 766M doi 10 1088 0004 6256 135 3 766 S2CID 6531922 Fekel Francis C 2003 Rotational Velocities of B A and Early F Narrow lined Stars The Publications of the Astronomical Society of the Pacific 115 809 807 810 Bibcode 2003PASP 115 807F doi 10 1086 376393 Piccotti Luca Docobo Jose Angel Carini Roberta Tamazian Vakhtang S Brocato Enzo Andrade Manuel Campo Pedro P 2020 A study of the physical properties of SB2s with both the visual and spectroscopic orbits Monthly Notices of the Royal Astronomical Society 492 2 2709 Bibcode 2020MNRAS 492 2709P doi 10 1093 mnras stz3616 External links edithttp stars astro illinois edu sow muori html Retrieved from https en wikipedia org w index php title Mu Orionis amp oldid 1171016032, wikipedia, wiki, book, books, library,
