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78 Pegasi is a binary star system in the n … 78 Pegasi is a binary star system in the northern constellation of Pegasus. It is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.93. The system is located approximately 224 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −8 km/s. The double-star nature of this system was discovered by A. G. Clark in 1862. The components of this system orbit each other over a 630-year period with an eccentricity of 0.11. The primary member, designated component A, is a magnitude 5.07 giant star with a stellar classification of K0III, having exhausted the supply of hydrogen at its core and expanded to 10 times the Sun's radius. It is a red clump giant, which indicates it is on the horizontal branch and is generating energy through core helium fusion. It has 1.5 times the mass of the Sun and is radiating 57 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,898 K. The secondary companion, component B, is magnitude 8.10.companion, component B, is magnitude 8.10.
, 飛馬座78，又名BD+28 4627，HD 222842、SAO 91457、HR 8997，是飛馬座的一颗恒星，视星等为4.93，位于銀經105.73，銀緯-31.25，其B1900.0坐标为赤經23h 38m 57.5s，赤緯+28° -31.25′ 27″。
, 78 Pegasi, som är stjärnans Flamsteed-bete … 78 Pegasi, som är stjärnans Flamsteed-beteckning, är en dubbelstjärna belägen i den norra delen av stjärnbilden Pegasus. Den har en kombinerad skenbar magnitud på ca 4,93 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 14,5 mas, beräknas den befinna sig på ett avstånd på ca 224 ljusår (ca 69 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca –8 km/s.liocentrisk radialhastighet av ca –8 km/s.
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78 Pegasi, som är stjärnans Flamsteed-bete … 78 Pegasi, som är stjärnans Flamsteed-beteckning, är en dubbelstjärna belägen i den norra delen av stjärnbilden Pegasus. Den har en kombinerad skenbar magnitud på ca 4,93 och är svagt synlig för blotta ögat där ljusföroreningar ej förekommer. Baserat på parallaxmätning inom Hipparcosuppdraget på ca 14,5 mas, beräknas den befinna sig på ett avstånd på ca 224 ljusår (ca 69 parsek) från solen. Den rör sig närmare solen med en heliocentrisk radialhastighet av ca –8 km/s.liocentrisk radialhastighet av ca –8 km/s.
, 飛馬座78，又名BD+28 4627，HD 222842、SAO 91457、HR 8997，是飛馬座的一颗恒星，视星等为4.93，位于銀經105.73，銀緯-31.25，其B1900.0坐标为赤經23h 38m 57.5s，赤緯+28° -31.25′ 27″。
, 78 Pegasi is a binary star system in the n … 78 Pegasi is a binary star system in the northern constellation of Pegasus. It is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.93. The system is located approximately 224 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −8 km/s. The double-star nature of this system was discovered by A. G. Clark in 1862. The components of this system orbit each other over a 630-year period with an eccentricity of 0.11.-year period with an eccentricity of 0.11.
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78 Pegasi
, 壁宿增三
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