The H II region is a roundish volume of ionized hydrogen. It has a diameter of about 4.5′, at its distance meaning it measures 2.1 ly (0.65 pc). The net (meaning omitting the star) hydrogen alpha luminosity of this region is (3.0±1.1)×1035 erg s−1; equivalent to 78 L☉. There is a dark lane crossing the whole west-centre strip from north to south, known as the M43 dark lane, which forming a swirling belt extension to the south links to Orion's northeast dark lane. All of these resemble a mixture of smoke rising from a chimney and in watercolour broad and fine dark brushstrokes, at many wavelengths.
^ abSulentic, Jack W.; et al. (1973), The revised new catalogue of nonstellar astronomical objects, Tucson: University of Arizona Press, Bibcode:1973rncn.book.....S.
^"Messier 43". SEDS Messier Catalog. Retrieved 29 April 2022.
^ abAdam, Len (2018), Imaging the Messier Objects Remotely from Your Laptop, The Patrick Moore Practical Astronomy Series, Springer, p. 209, Bibcode:2018imor.book.....A, ISBN978-3319653853.
^ abSimón-Díaz, S.; et al. (June 2011), "A detailed study of the H ii region M 43 and its ionizing star", Astronomy & Astrophysics, 530: 13, arXiv:1103.3628, Bibcode:2011A&A...530A..57S, doi:10.1051/0004-6361/201116608, A57.
External linksedit
Wikimedia Commons has media related to Messier 43.
Frommert, Hartmut; Kronberg, Christine (October 8, 2018), Messier 43: De Mairan's Nebula, Companion of the Orion Nebula, Students for the Exploration and Development of Space (SEDS), retrieved 2018-11-26
Messier 43 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
messier, also, known, mairan, nebula, 1982, star, forming, nebula, with, prominent, region, equatorial, constellation, orion, discovered, french, scientist, jean, jacques, ortous, mairan, some, time, before, 1731, then, catalogued, charles, messier, 1769, phys. Messier 43 or M43 also known as De Mairan s Nebula and NGC 1982 is a star forming nebula with a prominent H II region in the equatorial constellation of Orion It was discovered by the French scientist Jean Jacques d Ortous de Mairan some time before 1731 3 then catalogued by Charles Messier in 1769 a It is physically part of the Orion Nebula Messier 42 separate from that main nebula by a dense lane of dust known as the northeast dark lane 5 It is part of the much larger Orion molecular cloud complex Messier 43Emission nebulaH II regionEmission nebula Messier 43 in OrionObservation data J2000 epochRight ascension05h 35m 31 8s 1 Declination 05 17 57 1 Distance1 300 160 ly 400 50 pc lyApparent magnitude V 9 0 2 Apparent dimensions V 20 15 3 ConstellationOrionNotable featuresTrapezium clusterDesignationsDe Mairan s Nebula M43 NGC 1982 4 See also Lists of nebulaeThe main ionizing star in this nebula is HD 37061 variable star designation NU Ori b the focus of the H II region 1 300 160 ly 400 50 pc away c This is a triple star system with the brighter component being a single lined spectroscopic binary The main component is a blue white hued B type main sequence star with a stellar classification of B0 5V or B1V It has 19 7 times the mass of the Sun M and 5 7 0 8 times the Sun s radius R It is radiating over 26 000 times the Sun s luminosity L from its photosphere at an effective temperature of 31 000 K It is spinning rapidly with a projected rotational velocity of around 200 km s 5 The H II region is a roundish volume of ionized hydrogen It has a diameter of about 4 5 at its distance meaning it measures 2 1 ly 0 65 pc The net meaning omitting the star hydrogen alpha luminosity of this region is 3 0 1 1 1035 erg s 1 equivalent to 78 L There is a dark lane crossing the whole west centre strip from north to south known as the M43 dark lane which forming a swirling belt extension to the south links to Orion s northeast dark lane All of these resemble a mixture of smoke rising from a chimney and in watercolour broad and fine dark brushstrokes at many wavelengths Contents 1 Gallery 2 See also 3 References and footnotes 4 External linksGallery edit nbsp Infrared view of part of De Mairan s Nebula M43 See also editList of Messier objectsReferences and footnotes edit a b Sulentic Jack W et al 1973 The revised new catalogue of nonstellar astronomical objects Tucson University of Arizona Press Bibcode 1973rncn book S Messier 43 SEDS Messier Catalog Retrieved 29 April 2022 a b Adam Len 2018 Imaging the Messier Objects Remotely from Your Laptop The Patrick Moore Practical Astronomy Series Springer p 209 Bibcode 2018imor book A ISBN 978 3319653853 M 43 SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved November 25 2018 a b Simon Diaz S et al June 2011 A detailed study of the H ii region M 43 and its ionizing star Astronomy amp Astrophysics 530 13 arXiv 1103 3628 Bibcode 2011A amp A 530A 57S doi 10 1051 0004 6361 201116608 A57 External links edit nbsp Wikimedia Commons has media related to Messier 43 Garner Rob ed October 19 2017 Messier 43 NASA retrieved 2018 11 26 Frommert Hartmut Kronberg Christine October 8 2018 Messier 43 De Mairan s Nebula Companion of the Orion Nebula Students for the Exploration and Development of Space SEDS retrieved 2018 11 26 Messier 43 on WikiSky DSS2 SDSS GALEX IRAS Hydrogen a X Ray Astrophoto Sky Map Articles and images On March 4 Full name NU Orionis Gaia Data Release 2 gives a parallax that would place it 1 706 36 light years 523 11 pc away Portals nbsp Astronomy nbsp Stars nbsp Outer space Retrieved from https en wikipedia org w index php title Messier 43 amp oldid 1179311536, wikipedia, wiki, book, books, library,
