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• Iota_Orionis abstract "Iota Orionis (ι Ori, ι Orionis) is a star in the equatorial constellation of Orion the hunter. The apparent visual magnitude of Iota Orionis is 2.77, making it the eighth brightest member of Orion. It is the brightest star in an asterism known as Orion's sword. Iota Orionis has the traditional names Hatsya or Hatysa and in Arabic, Na’ir al Saif, which means simply "the Bright One of the Sword." From parallax measurements, it is located at a distance of roughly 1,330 light-years (410 parsecs) from Earth.Iota Orionis is a quadruple system dominated by a massive spectroscopic binary with an eccentric (e=0.764), 29-day orbit. The binary is composed of a stellar class O9 III star (blue giant) and a class B0.8 III/IV star, with the secondary being about 2 magnitudes fainter. The collision of the stellar winds from this pair makes the system a strong X-ray source. Oddly, the two objects of this system appear to have different ages, with the secondary being about double the age of the primary. In combination with the high eccentricity of their orbit, this suggests that the binary system was created through a capture, rather than by being formed together and undergoing a mass transfer. This capture may have occurred, for example, through an encounter between two binary systems.".
• Iota_Orionis thumbnail Hatsya.png?width=300.
• Iota_Orionis wikiPageExternalLink nairalsaif.html.
• Iota_Orionis wikiPageExternalLink Iota_Orionis.html.
• Iota_Orionis wikiPageID "920344".
• Iota_Orionis wikiPageLength "7491".
• Iota_Orionis wikiPageOutDegree "32".
• Iota_Orionis wikiPageRevisionID "662447439".
• Iota_Orionis wikiPageWikiLink Apparent_magnitude.
• Iota_Orionis wikiPageWikiLink Apparent_visual_magnitude.
• Iota_Orionis wikiPageWikiLink Arabic.
• Iota_Orionis wikiPageWikiLink Arabic_language.
• Iota_Orionis wikiPageWikiLink Asterism_(astronomy).
• Iota_Orionis wikiPageWikiLink Binary_star.
• Iota_Orionis wikiPageWikiLink Blue_giant.
• Iota_Orionis wikiPageWikiLink Bonner_Durchmusterung.
• Iota_Orionis wikiPageWikiLink Bright_Star_Catalogue.
• Iota_Orionis wikiPageWikiLink Catalogues_of_Fundamental_Stars.
• Iota_Orionis wikiPageWikiLink Category:B-type_giants.
• Iota_Orionis wikiPageWikiLink Category:Bayer_objects.
• Iota_Orionis wikiPageWikiLink Category:Multiple_star_systems.
• Iota_Orionis wikiPageWikiLink Category:O-type_giants.
• Iota_Orionis wikiPageWikiLink Category:Orion_(constellation).
• Iota_Orionis wikiPageWikiLink Category:Spectroscopic_binaries.
• Iota_Orionis wikiPageWikiLink Category:Stars_with_proper_names.
• Iota_Orionis wikiPageWikiLink Celestial_equator.
• Iota_Orionis wikiPageWikiLink Constellation.
• Iota_Orionis wikiPageWikiLink Durchmusterung.
• Iota_Orionis wikiPageWikiLink FK5.
• Iota_Orionis wikiPageWikiLink Harvard_Revised_catalogue.
• Iota_Orionis wikiPageWikiLink Henry_Draper_Catalogue.
• Iota_Orionis wikiPageWikiLink Henry_Draper_catalogue.
• Iota_Orionis wikiPageWikiLink Hipparcos.
• Iota_Orionis wikiPageWikiLink Hipparcos_catalogue.
• Iota_Orionis wikiPageWikiLink Orion_(constellation).
• Iota_Orionis wikiPageWikiLink Orions_Sword.
• Iota_Orionis wikiPageWikiLink Orions_sword.
• Iota_Orionis wikiPageWikiLink Parallax.
• Iota_Orionis wikiPageWikiLink Skalnate_Pleso_Atlas_of_the_Heavens.
• Iota_Orionis wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
• Iota_Orionis wikiPageWikiLink Spectroscopic_binary.
• Iota_Orionis wikiPageWikiLink Star.
• Iota_Orionis wikiPageWikiLink Stellar_classification.
• Iota_Orionis wikiPageWikiLink Stellar_wind.
• Iota_Orionis wikiPageWikiLink Stellarium.
• Iota_Orionis wikiPageWikiLink X-ray.
• Iota_Orionis wikiPageWikiLink File:Hatsya.png.
• Iota_Orionis wikiPageWikiLinkText "Iota Orionis".
• Iota_Orionis wikiPageWikiLinkText "Nair Al Saif".
• Iota_Orionis wikiPageWikiLinkText "ι Ori".
• Iota_Orionis wikiPageWikiLinkText "ι Orionis".
• Iota_Orionis ageMyr "4".
• Iota_Orionis ageMyr "9.4".
• Iota_Orionis appmagV "2.77".
• Iota_Orionis bV "–0.24".
• Iota_Orionis class "O9 III + B0.8 III/IV".
• Iota_Orionis component "ι Ori A".
• Iota_Orionis component "ι Ori B".
• Iota_Orionis constell Orion_(constellation).
• Iota_Orionis eccentricity "0.764".
• Iota_Orionis epoch "J2000".
• Iota_Orionis gravity "3.73".
• Iota_Orionis gravity "3.78".
• Iota_Orionis hasPhotoCollection Iota_Orionis.
• Iota_Orionis metalFe "+0.10".
• Iota_Orionis pError "0.22".
• Iota_Orionis parallax "1.4".
• Iota_Orionis periastron "2450072.8".
• Iota_Orionis periodUnitless "2517160.3200000003".
• Iota_Orionis propMoDec "–0.46".
• Iota_Orionis propMoRa "+1.42".
• Iota_Orionis radialV "21.5".
• Iota_Orionis rotationalVelocity "122".
• Iota_Orionis temperature "27000".
• Iota_Orionis temperature "32500".
• Iota_Orionis uB "–1.08".
• Iota_Orionis wikiPageUsesTemplate Template:Convert.
• Iota_Orionis wikiPageUsesTemplate Template:Reflist.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_astrometry.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_begin.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_catalog.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_character.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_detail.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_end.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_image.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_observe.
• Iota_Orionis wikiPageUsesTemplate Template:Starbox_orbit.
• Iota_Orionis wikiPageUsesTemplate Template:Stars_of_Orion.
• Iota_Orionis subject Category:B-type_giants.
• Iota_Orionis subject Category:Bayer_objects.
• Iota_Orionis subject Category:Multiple_star_systems.
• Iota_Orionis subject Category:O-type_giants.
• Iota_Orionis subject Category:Orion_(constellation).
• Iota_Orionis subject Category:Spectroscopic_binaries.
• Iota_Orionis subject Category:Stars_with_proper_names.
• Iota_Orionis hypernym Star.
• Iota_Orionis type CelestialBody.
• Iota_Orionis type Place.
• Iota_Orionis type Star.
• Iota_Orionis type Catalogue.

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