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Sigma Ophiuchi (49 Ophiuchi) é uma estrela … Sigma Ophiuchi (49 Ophiuchi) é uma estrela na direção da constelação de Ophiuchus. Possui uma ascensão reta de 17h 26m 30.88s e uma declinação de +04° 08′ 25.2″. Sua magnitude aparente é igual a 4.34. Considerando sua distância de 1173 anos-luz em relação à Terra, sua magnitude absoluta é igual a −3.44. Pertence à classe espectral K3IIvar.3.44. Pertence à classe espectral K3IIvar.
, Sigma Ophiuchi, Latinized from σ Ophiuchi, … Sigma Ophiuchi, Latinized from σ Ophiuchi, is a single, orange-hued star in the equatorial constellation Ophiuchus. Its apparent visual magnitude is 4.31, which is bright enough to be faintly visible to the naked eye. The annual parallax shift of 3.62 mas as seen from Earth provides a distance estimate of roughly 900 light years. It is moving closer to the Sun with a radial velocity of −28 km/s. This is an evolved giant star of type K with a stellar classification of K2 III. Wittkowski et al. (2017) consider it to have a luminosity class of II-III, suggesting it is in a transitional zone between giants and supergiant stars. It has around 5 times the mass of the Sun and 73 times the Sun's radius. The star is radiating 2,047 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,540 K.re at an effective temperature of 4,540 K.
, 蛇夫座σ，又名BD+04 3422，HD 157999、SAO 122387、HR 6498，是蛇夫座的一颗恒星，视星等为4.34，位于銀經26.77，銀緯20.75，其B1900.0坐标为赤經17h 21m 33.1s，赤緯+4° 20.75′ 38″。
, Sigma Ophiuchi (σ Ophiuchi , förkortat Sig … Sigma Ophiuchi (σ Ophiuchi , förkortat Sigma Oph, σ Oph) som är stjärnans Bayerbeteckning, är en jättestjärna belägen i den mellersta delen av stjärnbilden Ormbäraren. Den har en genomsnittlig skenbar magnitud på 4,31 och är synlig för blotta ögat. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 3,6 mas, beräknas den befinna sig på ett avstånd av ca 900 ljusår (280 parsek) från solen. av ca 900 ljusår (280 parsek) från solen.
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蛇夫座σ，又名BD+04 3422，HD 157999、SAO 122387、HR 6498，是蛇夫座的一颗恒星，视星等为4.34，位于銀經26.77，銀緯20.75，其B1900.0坐标为赤經17h 21m 33.1s，赤緯+4° 20.75′ 38″。
, Sigma Ophiuchi (σ Ophiuchi , förkortat Sig … Sigma Ophiuchi (σ Ophiuchi , förkortat Sigma Oph, σ Oph) som är stjärnans Bayerbeteckning, är en jättestjärna belägen i den mellersta delen av stjärnbilden Ormbäraren. Den har en genomsnittlig skenbar magnitud på 4,31 och är synlig för blotta ögat. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 3,6 mas, beräknas den befinna sig på ett avstånd av ca 900 ljusår (280 parsek) från solen. av ca 900 ljusår (280 parsek) från solen.
, Sigma Ophiuchi, Latinized from σ Ophiuchi, … Sigma Ophiuchi, Latinized from σ Ophiuchi, is a single, orange-hued star in the equatorial constellation Ophiuchus. Its apparent visual magnitude is 4.31, which is bright enough to be faintly visible to the naked eye. The annual parallax shift of 3.62 mas as seen from Earth provides a distance estimate of roughly 900 light years. It is moving closer to the Sun with a radial velocity of −28 km/s.he Sun with a radial velocity of −28 km/s.
, Sigma Ophiuchi (49 Ophiuchi) é uma estrela … Sigma Ophiuchi (49 Ophiuchi) é uma estrela na direção da constelação de Ophiuchus. Possui uma ascensão reta de 17h 26m 30.88s e uma declinação de +04° 08′ 25.2″. Sua magnitude aparente é igual a 4.34. Considerando sua distância de 1173 anos-luz em relação à Terra, sua magnitude absoluta é igual a −3.44. Pertence à classe espectral K3IIvar.3.44. Pertence à classe espectral K3IIvar.
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Sigma Ophiuchi
, 宗正增二
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