Sirius B

URI: https://gptkb.org/entity/Sirius_B
GPTKB entity
Statements (29)
Predicate Object
gptkbp:instanceOf white dwarf
gptkbp:apparentMagnitude 8.44
gptkbp:catalogueNumber gptkb:HR_2491B
gptkbp:constellation gptkb:Canis_Major
gptkbp:declination −16° 42′ 58″
gptkbp:diameter 0.0084 solar radii
gptkbp:discoveredBy gptkb:Alvan_Graham_Clark
gptkbp:discoveredIn 1862
gptkbp:distanceFromEarth 8.6 light years
gptkbp:distanceFromSiriusA variable (minimum ~8.2 AU, maximum ~31.5 AU)
gptkbp:evolutionaryStage degenerate star
gptkbp:hasCompanion gptkb:Sirius_A
https://www.w3.org/2000/01/rdf-schema#label Sirius B
gptkbp:mass 1.018 solar masses
gptkbp:metallicity solar
gptkbp:notableFor first white dwarf discovered
gptkbp:orbitType 50.1 years
gptkbp:otherName gptkb:HD_48915B
gptkb:WD_0642-166
gptkbp:partOf gptkb:Sirius_star_system
gptkbp:progenitorType stellar classification
gptkbp:rightAscension 06h 45m 08.9s
gptkbp:rotationPeriod unknown
gptkbp:spectralType DA2
gptkbp:surfaceGravity log(g) = 8.57
gptkbp:temperature 25,200 K
gptkbp:bfsParent gptkb:white_dwarf_stars
gptkb:white_dwarfs
gptkbp:bfsLayer 5