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- Alpha_Aquarii abstract "Alpha Aquarii (Alpha Aqr, α Aquarii, α Aqr) is a single star in the Aquarius. It has the traditional name Sadalmelik, which is derived from Arabic for \"Luck of the king\". The apparent visual magnitude of 2.94 makes this the second-brightest star in Aquarius. Based upon parallax measurements made during the Hipparcos mission, this star is located at a distance of roughly 520 light-years (160 parsecs) from Earth.With an age of 53 million years, this star has evolved into a supergiant with a stellar classification of G2 Ib. It has 6.5 as much mass as the Sun and has expanded to around 77 times the Sun's radius. It is radiating 3,000 times as much luminosity as the Sun from its outer atmosphere at an effective temperature of 5,210 K. At this heat, the star glows with the yellow hue of a G-type star. Examination of this star with the Chandra X-ray Observatory shows it to be significantly X-ray deficient compared to G-type main sequence stars. This deficit is a common feature of early G-type giant stars.Sadalmelik has a visual companion, designated CCDM J22058-0019B, with an apparent visual magnitude of approximately 12.2. It is at an angular separation of 110.4 arcseconds from Sadalmelik along a position angle of 40°.The name Sadalmelik derives from an Arabic expression سعد الملك sa‘d al-malik meaning \"Luck of the king\". The name Rucbah has also been applied to this star; it shares this name with Delta Cassiopeiae. It is only one of two stars with ancient proper names to lie within a degree of the celestial equator. The origin of the Arabic name is lost to history.In Chinese, 危宿 (Wēi Xiù), meaning Rooftop (asterism), refers to an asterism consisting of α Aquarii, θ Pegasi and ε Pegasi. Consequently, α Aquarii itself is known as 危宿一 (Wēi Xiù yī, English: the First Star of Rooftop.)".
- Alpha_Aquarii thumbnail Aquarius_IAU.svg?width=300.
- Alpha_Aquarii wikiPageExternalLink AladinPreview?-c=NAME+SADALMELIK&ident=NAME+SADALMELIK&submit=Aladin+previewer.
- Alpha_Aquarii wikiPageExternalLink ?starid=108.
- Alpha_Aquarii wikiPageID "2108786".
- Alpha_Aquarii wikiPageLength "10479".
- Alpha_Aquarii wikiPageOutDegree "47".
- Alpha_Aquarii wikiPageRevisionID "697972890".
- Alpha_Aquarii wikiPageWikiLink Angular_distance.
- Alpha_Aquarii wikiPageWikiLink Apparent_magnitude.
- Alpha_Aquarii wikiPageWikiLink Aquarius_(constellation).
- Alpha_Aquarii wikiPageWikiLink Arabic.
- Alpha_Aquarii wikiPageWikiLink Bayer_designation.
- Alpha_Aquarii wikiPageWikiLink Bright_Star_Catalogue.
- Alpha_Aquarii wikiPageWikiLink Catalogues_of_Fundamental_Stars.
- Alpha_Aquarii wikiPageWikiLink Category:Aquarius_(constellation).
- Alpha_Aquarii wikiPageWikiLink Category:Bayer_objects.
- Alpha_Aquarii wikiPageWikiLink Category:Double_stars.
- Alpha_Aquarii wikiPageWikiLink Category:Durchmusterung_objects.
- Alpha_Aquarii wikiPageWikiLink Category:Flamsteed_objects.
- Alpha_Aquarii wikiPageWikiLink Category:G-type_supergiants.
- Alpha_Aquarii wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- Alpha_Aquarii wikiPageWikiLink Category:Hipparcos_objects.
- Alpha_Aquarii wikiPageWikiLink Category:Stars_with_proper_names.
- Alpha_Aquarii wikiPageWikiLink Chandra_X-ray_Observatory.
- Alpha_Aquarii wikiPageWikiLink Chinese_language.
- Alpha_Aquarii wikiPageWikiLink Delta_Cassiopeiae.
- Alpha_Aquarii wikiPageWikiLink Double_star.
- Alpha_Aquarii wikiPageWikiLink Durchmusterung.
- Alpha_Aquarii wikiPageWikiLink Effective_temperature.
- Alpha_Aquarii wikiPageWikiLink Epoch_(astronomy).
- Alpha_Aquarii wikiPageWikiLink Epsilon_Pegasi.
- Alpha_Aquarii wikiPageWikiLink Flamsteed_designation.
- Alpha_Aquarii wikiPageWikiLink Henry_Draper_Catalogue.
- Alpha_Aquarii wikiPageWikiLink Hipparcos.
- Alpha_Aquarii wikiPageWikiLink International_Celestial_Reference_System.
- Alpha_Aquarii wikiPageWikiLink Minute_and_second_of_arc.
- Alpha_Aquarii wikiPageWikiLink Parallax.
- Alpha_Aquarii wikiPageWikiLink Position_angle.
- Alpha_Aquarii wikiPageWikiLink Roof_(Chinese_constellation).
- Alpha_Aquarii wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- Alpha_Aquarii wikiPageWikiLink Star.
- Alpha_Aquarii wikiPageWikiLink Stellar_atmosphere.
- Alpha_Aquarii wikiPageWikiLink Stellar_classification.
- Alpha_Aquarii wikiPageWikiLink Stellar_evolution.
- Alpha_Aquarii wikiPageWikiLink Supergiant.
- Alpha_Aquarii wikiPageWikiLink Theta_Pegasi.
- Alpha_Aquarii wikiPageWikiLink File:Aquarius_IAU.svg.
- Alpha_Aquarii wikiPageWikiLink File:Cercle_rouge_100%25.svg.
- Alpha_Aquarii wikiPageWikiLinkText "α Aqr".
- Alpha_Aquarii wikiPageWikiLinkText "Alpha Aquarii".
- Alpha_Aquarii wikiPageWikiLinkText "Alpha".
- Alpha_Aquarii wikiPageWikiLinkText "Sadalmelik".
- Alpha_Aquarii wikiPageWikiLinkText "α Aqr".
- Alpha_Aquarii wikiPageWikiLinkText "α Aquarii".
- Alpha_Aquarii absmagV "–3.882".
- Alpha_Aquarii ageMyr "53".
- Alpha_Aquarii appmagV "2.942".
- Alpha_Aquarii bV "+0.971".
- Alpha_Aquarii class "G2 Ib".
- Alpha_Aquarii constell Aquarius_(constellation).
- Alpha_Aquarii epoch Epoch_(astronomy).
- Alpha_Aquarii equinox "J2000.0".
- Alpha_Aquarii gravity "1.76".
- Alpha_Aquarii luminosity "3000".
- Alpha_Aquarii mass "6.5".
- Alpha_Aquarii pError "0.19".
- Alpha_Aquarii parallax "6.23".
- Alpha_Aquarii propMoDec "−9.39".
- Alpha_Aquarii propMoRa "+18.25".
- Alpha_Aquarii rI "+0.49".
- Alpha_Aquarii radialV "7.5".
- Alpha_Aquarii radius "77".
- Alpha_Aquarii rotationalVelocity "6.7".
- Alpha_Aquarii temperature "5210".
- Alpha_Aquarii uB "+0.699".
- Alpha_Aquarii wikiPageUsesTemplate Template:Convert.
- Alpha_Aquarii wikiPageUsesTemplate Template:DEC.
- Alpha_Aquarii wikiPageUsesTemplate Template:Lang-en.
- Alpha_Aquarii wikiPageUsesTemplate Template:RA.
- Alpha_Aquarii wikiPageUsesTemplate Template:Reflist.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_astrometry.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_begin.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_catalog.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_character.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_detail.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_end.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_image.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_observe.
- Alpha_Aquarii wikiPageUsesTemplate Template:Starbox_reference.
- Alpha_Aquarii wikiPageUsesTemplate Template:Stars_of_Aquarius.
- Alpha_Aquarii subject Category:Aquarius_(constellation).
- Alpha_Aquarii subject Category:Bayer_objects.
- Alpha_Aquarii subject Category:Double_stars.
- Alpha_Aquarii subject Category:Durchmusterung_objects.
- Alpha_Aquarii subject Category:Flamsteed_objects.
- Alpha_Aquarii subject Category:G-type_supergiants.
- Alpha_Aquarii subject Category:Henry_Draper_Catalogue_objects.
- Alpha_Aquarii subject Category:Hipparcos_objects.
- Alpha_Aquarii subject Category:Stars_with_proper_names.