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- Meissa abstract "Meissa (Lambda Orionis, λ Ori) is a star in the constellation Orion. "Meissa" derives from the Arabic "Al-Maisan" which means "The Shining One". This term was used for Gamma Gemini (Alhena), but was somehow also mistakenly applied to Meissa and the name stuck. The original Arabic name for this star, "Al Hakah" (the source for another name for it, "Heka") refers to the Arabic lunar mansion that includes this star and the two of φ Ori (Al Haḳʽah, "a White Spot").In Chinese, 觜宿 (Zī Sù), meaning Turtle Beak (asterism), refers to an asterism consisting of Meissa and both of φ Ori Consequently, Meissa itself is known as 觜宿一 (Zī Sù yī, English: the First Star of Turtle Beak.)Meissa is a giant star with a stellar classification of O8 III and an apparent visible magnitude 3.54. It is an enormous star with about 28 times the mass of the Sun and 10 times the Sun's radius. The outer atmosphere has an effective temperature of around 35,000 K, giving it the characteristic blue glow of a hot O-type star. Meissa is a soft X-ray source with a luminosity of 1032 erg s−1 and peak emission in the energy range of 0.2–0.3 keV, which suggests the X-rays are probably being generated by the stellar wind.This star is the dominant member of a 5-million-year-old star-forming region known as the λ-Orionis cluster, or Collinder 69. The intense ultraviolet energy being radiated by this star is creating the Sh2-264 H II region in the neighboring volume of space, which in turn is surrounded by an expanding ring of cool gas that has an age of about 2–6 million years. The expansion of this gaseous ring may be explained by a former binary companion of Meissa that became a Type II supernova. Such an event would also explain the star's peculiar velocity with respect to the center of the expanding ring, as the explosion and resulting mass loss could have kicked Meissa out of the system. A potential candidate for the supernova remnant is the neutron star Geminga. However, the last is unlikely given the distance between Geminga and the cluster.Meissa is actually a double star with a companion at an angular separation of 4.41 arcseconds along a position angle of 43.12° (as of 1937). This fainter component is of magnitude 5.61 and it has a stellar classification of B0.5 V, making it a B-type main sequence star. There is an outlying component, Meissa C, which is an F-type main sequence star with a classification of F8 V. This star in turn may have a very low mass companion that is probably a brown dwarf.".
- Meissa thumbnail Orion_constellation_map.svg?width=300.
- Meissa wikiPageID "1344901".
- Meissa wikiPageLength "11244".
- Meissa wikiPageOutDegree "50".
- Meissa wikiPageRevisionID "680668390".
- Meissa wikiPageWikiLink Alhena.
- Meissa wikiPageWikiLink Angular_distance.
- Meissa wikiPageWikiLink Angular_separation.
- Meissa wikiPageWikiLink Apparent_magnitude.
- Meissa wikiPageWikiLink Arcsecond.
- Meissa wikiPageWikiLink B-type_main-sequence_star.
- Meissa wikiPageWikiLink B-type_main_sequence_star.
- Meissa wikiPageWikiLink Bayer_designation.
- Meissa wikiPageWikiLink Bonner_Durchmusterung.
- Meissa wikiPageWikiLink Bright_Star_Catalogue.
- Meissa wikiPageWikiLink Brown_dwarf.
- Meissa wikiPageWikiLink Category:B-type_main-sequence_stars.
- Meissa wikiPageWikiLink Category:Bayer_objects.
- Meissa wikiPageWikiLink Category:Binary_stars.
- Meissa wikiPageWikiLink Category:Flamsteed_objects.
- Meissa wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- Meissa wikiPageWikiLink Category:Hipparcos_objects.
- Meissa wikiPageWikiLink Category:O-type_giants.
- Meissa wikiPageWikiLink Category:Orion_(constellation).
- Meissa wikiPageWikiLink Category:Stars_with_proper_names.
- Meissa wikiPageWikiLink Chinese_language.
- Meissa wikiPageWikiLink Collinder_69.
- Meissa wikiPageWikiLink Constellation.
- Meissa wikiPageWikiLink Double_star.
- Meissa wikiPageWikiLink Durchmusterung.
- Meissa wikiPageWikiLink Effective_temperature.
- Meissa wikiPageWikiLink F-type_main-sequence_star.
- Meissa wikiPageWikiLink F-type_main_sequence_star.
- Meissa wikiPageWikiLink Flamsteed_designation.
- Meissa wikiPageWikiLink Gamma_Geminorum.
- Meissa wikiPageWikiLink Geminga.
- Meissa wikiPageWikiLink Giant_star.
- Meissa wikiPageWikiLink H_II_region.
- Meissa wikiPageWikiLink Harvard_Revised_catalogue.
- Meissa wikiPageWikiLink Henry_Draper_Catalogue.
- Meissa wikiPageWikiLink Henry_Draper_catalogue.
- Meissa wikiPageWikiLink Hipparcos.
- Meissa wikiPageWikiLink Hipparcos_Catalogue.
- Meissa wikiPageWikiLink Minute_and_second_of_arc.
- Meissa wikiPageWikiLink Neutron_star.
- Meissa wikiPageWikiLink O-type_star.
- Meissa wikiPageWikiLink Orion_(constellation).
- Meissa wikiPageWikiLink Peculiar_velocity.
- Meissa wikiPageWikiLink Phi_Orionis.
- Meissa wikiPageWikiLink Position_angle.
- Meissa wikiPageWikiLink Sh2-264.
- Meissa wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- Meissa wikiPageWikiLink Star.
- Meissa wikiPageWikiLink Stellar_atmosphere.
- Meissa wikiPageWikiLink Stellar_classification.
- Meissa wikiPageWikiLink Stellar_wind.
- Meissa wikiPageWikiLink Turtle_Beak_(Chinese_constellation).
- Meissa wikiPageWikiLink Type_II_supernova.
- Meissa wikiPageWikiLink File:Locator_Dot2.gif.
- Meissa wikiPageWikiLink File:Orion_constellation_map.svg.
- Meissa wikiPageWikiLinkText "Lambda Orionis".
- Meissa wikiPageWikiLinkText "Meissa A".
- Meissa wikiPageWikiLinkText "Meissa B".
- Meissa wikiPageWikiLinkText "Meissa".
- Meissa absmagV "–4.25 / -1.94".
- Meissa ageMyr "3".
- Meissa appmagV "3.54".
- Meissa bV "–0.21 / +0.04".
- Meissa class "O8 III + B0.5 V".
- Meissa component "Meissa A".
- Meissa constell Orion_(constellation).
- Meissa epoch "J2000".
- Meissa gravity "4".
- Meissa hasPhotoCollection Meissa.
- Meissa mass "27.9".
- Meissa pError "0.55".
- Meissa parallax "2.97".
- Meissa propMoDec "–2.94".
- Meissa propMoRa "–0.34".
- Meissa radialV "+33.5".
- Meissa radius "10".
- Meissa temperature "35046".
- Meissa uB "–1.01 / –0.77".
- Meissa wikiPageUsesTemplate Template:Lang-en.
- Meissa wikiPageUsesTemplate Template:Reflist.
- Meissa wikiPageUsesTemplate Template:Starbox_astrometry.
- Meissa wikiPageUsesTemplate Template:Starbox_begin.
- Meissa wikiPageUsesTemplate Template:Starbox_catalog.
- Meissa wikiPageUsesTemplate Template:Starbox_character.
- Meissa wikiPageUsesTemplate Template:Starbox_detail.
- Meissa wikiPageUsesTemplate Template:Starbox_end.
- Meissa wikiPageUsesTemplate Template:Starbox_image.
- Meissa wikiPageUsesTemplate Template:Starbox_observe.
- Meissa wikiPageUsesTemplate Template:Starbox_reference.
- Meissa wikiPageUsesTemplate Template:Stars_of_Orion.
- Meissa subject Category:B-type_main-sequence_stars.
- Meissa subject Category:Bayer_objects.
- Meissa subject Category:Binary_stars.
- Meissa subject Category:Flamsteed_objects.