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Saiph

Kappa Orionis, 53 Orionis

Proper NameSaiph
Bayer DesignationKappa Orionis
Flamsteed Number53 Orionis
HR (BSC)2004
HD38771
ConstellationOrion
Right Ascension5h 47m 45s
Declination-9° 40' 11"
Distance647 light years
198 parsecs
MagnitudeApparent: +2.1
Absolute: -4.7
Spectral ClassB0 Blue Supergiant
Optimum VisibilityDecember / January
NotesA distant blue supergiant, Saiph is approximately 60,000 times as luminous as the Sun, and approximately thirty times as massive. Massive stars like this one tend to have relatively brief lifespans, and this is the case with Saiph: though only about six million years old - a fraction of the Sun's age - it has already reached the later stages of its stellar evolution.

Forming the easternmost 'foot' of Orion in the night sky, Saiph is an immense and hot blue star of the supergiant type. Like many of the stars of Orion, it is distant from the Solar System, lying more than 600 light years from Earth.

HR Diagram
Miram
Nashira
La Superba
Mekbuda
Koeia
KR Muscae
Kruger 60 A
DO Cephei
Polis
θ Hydrae
TZ Arietis
Struve 2398 B
Xi Boötis B
x Carinae
w Carinae
ο1 Cygni
Petra
π Cephei
s Velorum A
Pincoya
Kapteyn's Star
Chaophraya
Cerberus
AU Microscopii
AX Microscopii
b Velorum
41 Draconis
75 Cygni
a Velorum
Nosaxa
HD 37131
GX Andromedae
Guniibuu
Groombridge 1618
Gakyid
Gliese 887
Gliese 687
Gliese 440
Inquill
IL Aquarii
k Hydrae
Dombay
e Aquilae
Ebla
CS Camelopardalis
ε Indi
Erakis
Felixvarela
Thabit
ν2 Canis Majoris
γ Pavonis
ρ Cygni
Alfirk
Teegarden's Star
β Pictoris
Proxima Centauri
Polaris
d Lupi
ζ Arae
π5 Orionis
15 Orionis
ν Persei
ι1 Scorpii
Ran
τ Ceti
Adhafera
Alchiba
θ Circini
Almaaz
Alnilam
BF Orionis
Capella
Betelgeuse
Naos
δ Caeli
FL Virginis
σ Orionis
Acubens
Sirius B
Schedar
Mu Aquilae
52 Orionis
U Sagittarii
ε Reticuli
EE Leonis
Sharjah
61 Cygni A
Arneb
Mebsuta
HO Librae
Unurgunite
Hind's Crimson Star
Enif
ο Capricorni B
Antares
UV Ceti
Hatysa
Mira
Atria
van Maanen's Star
Rigel
Avior
α Centauri A
δ Muscae
Ross 154
Achird
Mirfak
Deneb
Berehynia
WX Ursae Majoris
Wolf 498
Wolf 359
Wezen
Suhail
Sadr
Diya
η Carinae
Tureis
Azmidi
Sargas
χ Cygni
Saiph

Hertzprung-Russell diagram plotting the temperature and luminosity of Saiph (marked by the red circle) relative to other stars.

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