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سگ چوپان

بتا مارافسای

اطلاعات رصدی
مبدأ مبدأ (ستاره‌شناسی) (ICRS)      اعتدال مبدأ (ستاره‌شناسی) (ICRS)
صورت فلکی مارافسای
بعد ۱۷h ۴۳m ۲۸.۳۵۳s
میل ‏ ۰۲.۲۹″ ۳۴′ ‎+۰۴°
قدر ظاهری (ع) ۲.۷۵ to ۲.۷۷
مشخصات
نوع طیف K2III
شاخص رنگ U−B 1.24
شاخص رنگ B−V 1.16
اخترسنجی
سرعت شعاعی (Rv)-۱۲ ک.م./ث
حرکت خاص (μ) بعد: -۴۰.۶۷ mas/yr
میل: ۱۵۸.۸۰ mas/yr
اختلاف‌منظر (π)۳۹.۷۸ mas
قدر مطلق (MV)۰.۷۵ to ۰.۷۷
جزئیات
جرم۱.۱۳ [۱] M
شعاع۱۳.۲[۱] R
درخشندگی۶۲ L
درجه حرارت۴۴۶۷[۱] کلوین
نام‌گذاری‌های دیگر
β Oph, β Ophiuchi, 60 Oph, 60 Ophiuchi, Cebalrai, Cheleb, Kelb Alrai, HR 6603, BD +04°3489, HD 161096, SAO 122671, FK5 665, HIP 86742.

بتا مارافسای یک ستاره است که در صورت فلکی مارافسای قرار دارد. نام عربی آن «کلب راعی»، به معنی سگ چوپان است.

منابع

[ویرایش]
  1. ۱٫۰ ۱٫۱ ۱٫۲ Allende-Prieto & Lambert (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: masses, radii and effective temperatures". Astronomy and Astrophysics. ۳۵۲: ۵۵۵–۵۶۲. Bibcode:۱۹۹۹A&A...۳۵۲..۵۵۵A. ((cite journal)): Check |bibcode= length (help)
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سگ چوپان
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