|
gptkbp:instanceOf
|
gptkb:star
|
|
gptkbp:age
|
~8-10 million years
|
|
gptkbp:alsoKnownAs
|
gptkb:Betelgeuse
|
|
gptkbp:apparentMagnitude
|
0.42
|
|
gptkbp:brightestStar
|
Orion (sometimes second to Rigel)
|
|
gptkbp:carbonAbundance
|
enhanced
|
|
gptkbp:catalogue
|
gptkb:Hipparcos
gptkb:Henry_Draper_Catalogue
gptkb:Bright_Star_Catalogue
|
|
gptkbp:catalogueNumber
|
gptkb:BD+07_1055
gptkb:HIP_27989
gptkb:HR_2061
gptkb:SAO_113271
|
|
gptkbp:constellation
|
gptkb:Orion
|
|
gptkbp:declination
|
+07° 24′ 25.430″
|
|
gptkbp:diameter
|
~887 solar radii
|
|
gptkbp:discoveredBy
|
ancient astronomers
|
|
gptkbp:distanceFromEarth
|
~642.5 light-years
|
|
gptkbp:emits
|
gptkb:X-rays
gptkb:radio_waves
infrared radiation
radiation therapy
visible light
|
|
gptkbp:evolutionaryStage
|
red supergiant
|
|
gptkbp:expansion
|
expected to explode as supernova
|
|
gptkbp:hasCompanion
|
none confirmed
|
|
gptkbp:hasInfraredExcess
|
yes
|
|
gptkbp:heliumAbundance
|
high
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
HD 39801
|
|
gptkbp:hydrogenAbundance
|
depleted
|
|
gptkbp:IAUApprovedName
|
gptkb:Betelgeuse
|
|
gptkbp:luminosity
|
~126,000 times Sun
|
|
gptkbp:mass
|
~16.5 solar masses
|
|
gptkbp:metallicity
|
−0.15 [Fe/H]
|
|
gptkbp:nickname
|
gptkb:Alpha_Orionis
|
|
gptkbp:notableEvent
|
gptkb:2019-2020_dimming_event
|
|
gptkbp:observedBy
|
gptkb:Very_Large_Telescope
gptkb:Hubble_Space_Telescope
gptkb:ALMA
|
|
gptkbp:oxygenAbundance
|
enhanced
|
|
gptkbp:parallax
|
5.95 mas
|
|
gptkbp:partOf
|
gptkb:Orion's_shoulder
|
|
gptkbp:properMotionRA
|
24.95 mas/yr
9.56 mas/yr
|
|
gptkbp:radialVelocity
|
21.91 km/s
|
|
gptkbp:rightAscension
|
05h 55m 10.3053s
|
|
gptkbp:rotationPeriod
|
5 km/s
|
|
gptkbp:spectralType
|
M1-2 Ia-ab
|
|
gptkbp:surfaceGravity
|
~0.0–0.5 cgs
|
|
gptkbp:temperature
|
~3,500 K
|
|
gptkbp:variableStar
|
semiregular variable
|
|
gptkbp:visibleToNakedEye
|
yes
|
|
gptkbp:bfsParent
|
gptkb:Betelgeuse
|
|
gptkbp:bfsLayer
|
6
|