Eta Carinae binary system

URI: https://gptkb.org/entity/Eta_Carinae_binary_system
GPTKB entity
Statements (51)
Predicate Object
gptkbp:instanceOf binary star system
gptkbp:apastronSeparation ~30 AU
gptkbp:apparentMagnitude −12.5
varies (4.2 to 7.9)
gptkbp:associatedWith gptkb:Carina_Nebula
gptkbp:catalogueNumber gptkb:HD_93308
gptkb:HIP_52067
gptkb:HR_4210
gptkb:SAO_238429
2MASS J10445192-5956020
CD−59° 2552
gptkbp:contains gptkb:Eta_Carinae_A
gptkb:Eta_Carinae_B
gptkbp:declination −59° 41′ 4.26″
gptkbp:discoveredBy Edmond Halley (as a star, 1677)
gptkbp:distanceFromEarth ~7,500 light-years
gptkbp:eccentricity ~0.9
gptkbp:epoch gptkb:J2000
gptkbp:expectedToEndAs supernova or hypernova
https://www.w3.org/2000/01/rdf-schema#label Eta Carinae binary system
gptkbp:inclination ~41°
gptkbp:infraredPort yes
gptkbp:locatedIn gptkb:Carina_constellation
gptkbp:luminosity ~5 million times Sun
gptkbp:massOfPrimary ~100 solar masses
gptkbp:massOfSecondary ~30 solar masses
gptkbp:metallicity ~solar
gptkbp:notableEvent gptkb:Great_Eruption_(1837–1858)
gptkbp:notableFor Great Eruption (19th century)
gptkbp:orbitType ~5.54 years
gptkbp:parallax 0.0342 mas
0.4401 mas
gptkbp:periastronSeparation ~1.6 AU
gptkbp:radioSource yes
gptkbp:radiusOfPrimary ~60–180 solar radii
gptkbp:radiusOfSecondary ~20 solar radii
gptkbp:rightAscension 10h 45m 3.591s
gptkbp:spectralType LBV (luminous blue variable) + O or WR star
gptkbp:studiedBy gptkb:Chandra_X-ray_Observatory
gptkb:Hubble_Space_Telescope
gptkbp:surroundedBy gptkb:Homunculus_Nebula
gptkbp:temperatureOfPrimary ~15,000–25,000 K
gptkbp:temperatureOfSecondary ~37,000–41,000 K
gptkbp:variableType S Doradus variable
gptkbp:windMassLossRatePrimary ~10⁻³ solar masses/year
gptkbp:windMassLossRateSecondary ~10⁻⁵ solar masses/year
gptkbp:windVelocityPrimary ~500–700 km/s
gptkbp:windVelocitySecondary ~3,000 km/s
gptkbp:XRaySource yes
gptkbp:bfsParent gptkb:Eta_Carinae_A
gptkbp:bfsLayer 7