Alfa Herculis

Alfa Herculis
Flamsteedin designaatio 64 Herculis
Fyysiset ominaisuudet
Näennäinen kirkkaus 3,48 / 5,4 mv
Massa 14 M☉
Säde 400 R☉
Astrometriset ominaisuudet
Tähdistö Herkules
Rektaskensio (J2000) 17h 14m 38,80s
Deklinaatio (J2000) +14° 23′ 25,0″
Etäisyys noin 380 valovuotta
120 parsekia
Parallaksi 8,53 ± 2,03 mas
Ominaisliike RA: −6,71
Dec: 32,78 mas/v

Alfa Herculis on kolmoistähti Herkuleen tähdistössä 380 valovuoden päässä Maasta. Se tunnetaan myös nimellä Ras Algethi. Herculis A on punainen jättiläinen, Herculis Ba keltainen jättiläinen ja Herculis Bb valkoinen kääpiö. Sen säde on 400 kertaa Auringon säde ja massa 14 kertaa niin suuri kuin Auringon.

Herkuleen tähdistö (Hercules) » luettelo tähdistä, luokka
Tähdetβ Her, ζ Her, δ Her, π Her, α1 Her, μ Her, η Her, ξ Her, γ Her, ι Her, ο Her, 109 Her, θ Her, τ Her, ε Her, ρ Her, 110 Her, σ Her, φ Her, 95 Her, 111 Her, 102 Her, λ Her, ν Her, 113 Her, ρ Her, ω Her, 113 Her, χ Her, 69 Her, 93 Her, υ Her, 68 Her, 52 Her, 30 Her, 29 Her, 42 Her, 60 Her, 106 Her, 95 Her, 98 Her, 104 Her, 32 Oph, κ Her, 51 Her, 99 Her, 87 Her, 5 Her, 101 Her, 107 Her, 70 Her, 43 Her, 90 Her, 45 Her, HD 148897, 96 Her, 59 Her, 105 Her, 53 Her, 2 Her, 54 Her, 82 Her, 72 Her, α2 Her, HD 155103, 112 Her, 9 Her, 89 Her, 47 Her, 74 Her, 25 Her, 83 Her, 108 Her, n Her, 78 Her, 73 Her, 16 Her, 4 Her, 50 Her, 84 Her, 10 Her, 79 Her, 37 Her, 100 Her, 21 Her, 77 Her, 100 Her, 39 Her, 56 Her, q Her, 8 Her, 61 Her, 63 Her, OP Her, 97 Her, κ Her, 57 Her, 34 Her, 49 Her, X Her, 41 Her, 48 Her, 14 Her, 49 Ser, 19 Her, U Her, 88 Her, 32 Her, 36 Her, HD 164922, 31 Her, 13 Her, HD 149026, HD 170469
Eksoplaneetat14 Her b, HD 164922 b, HD 149026 b
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