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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". Ulug Beg was combined the name with ο Aqr. 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 Sù), 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 Sù 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 wikiPageRevisionID "605624420".
- 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 hasPhotoCollection Alpha_Aquarii.
- Alpha_Aquarii luminosity "3000".
- 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 uB "+0.699".
- 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.
- Alpha_Aquarii type BayerObjects.
- Alpha_Aquarii type BinaryStar109221070.
- Alpha_Aquarii type CelestialBody109239740.
- Alpha_Aquarii type DoubleStars.
- Alpha_Aquarii type DurchmusterungObjects.
- Alpha_Aquarii type FlamsteedObjects.
- Alpha_Aquarii type G-typeSupergiants.
- Alpha_Aquarii type HIPObjects.
- Alpha_Aquarii type HenryDraperCatalogueObjects.
- Alpha_Aquarii type NaturalObject100019128.
- Alpha_Aquarii type Object100002684.
- Alpha_Aquarii type PhysicalEntity100001930.
- Alpha_Aquarii type Star109444100.
- Alpha_Aquarii type StarsWithProperNames.
- Alpha_Aquarii type Supergiant109450708.
- Alpha_Aquarii type Whole100003553.
- Alpha_Aquarii type CelestialBody.
- Alpha_Aquarii type Star.
- Alpha_Aquarii type PhysicalBody.
- Alpha_Aquarii comment "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.".
- Alpha_Aquarii label "Alpha Aquarii".
- Alpha_Aquarii label "Alpha Aquarii".
- Alpha_Aquarii label "Alpha Aquarii".
- Alpha_Aquarii label "Sadalmelik".
- Alpha_Aquarii label "Sadalmelik".
- Alpha_Aquarii label "Sadalmelik".
- Alpha_Aquarii label "Sadalmelik".
- Alpha_Aquarii label "Sadalmelik".
- Alpha_Aquarii label "Альфа Водолея".
- Alpha_Aquarii label "سعد الملك".
- Alpha_Aquarii label "みずがめ座アルファ星".
- Alpha_Aquarii label "危宿一".
- Alpha_Aquarii sameAs Sadalmelik.
- Alpha_Aquarii sameAs Sadalmelik.
- Alpha_Aquarii sameAs Alpha_Aquarii.
- Alpha_Aquarii sameAs Alpha_Aquarii.
- Alpha_Aquarii sameAs Sadalmelik.
- Alpha_Aquarii sameAs みずがめ座アルファ星.
- Alpha_Aquarii sameAs 사달멜리크.
- Alpha_Aquarii sameAs Sadalmelik.
- Alpha_Aquarii sameAs Sadalmelik.
- Alpha_Aquarii sameAs Alpha_Aquarii.
- Alpha_Aquarii sameAs m.06mpkd.
- Alpha_Aquarii sameAs Q13246.
- Alpha_Aquarii sameAs Q13246.
- Alpha_Aquarii sameAs Alpha_Aquarii.
- Alpha_Aquarii wasDerivedFrom Alpha_Aquarii?oldid=605624420.
- Alpha_Aquarii depiction Aquarius_IAU.svg.
- Alpha_Aquarii isPrimaryTopicOf Alpha_Aquarii.
- Alpha_Aquarii name "Alpha Aquarii".