HR 2491

E712262

HR 2491 is the Harvard Revised (Bright Star Catalogue) designation for Sirius, the brightest star in the night sky located in the constellation Canis Major.

All labels observed (1)

Label Occurrences
HR 2491 canonical 3

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf star
alsoKnownAs Alpha Canis Majoris
Sirius
apparentMagnitude -1.46
associatedConstellationFigure Greater Dog
brightestStarInNightSky true
catalogDesignation Bright Star Catalogue
Harvard Revised Catalogue
colorIndexBMinusV 0.00
component Sirius A
linked to: Sirius

Sirius B
constellation Canis Major
declination -16° 42′ 58″
distanceFromEarth_ly about 8.6
distanceFromEarth_pc about 2.64
effectiveTemperature_K about 9940
epoch J2000
galacticLatitude_deg about -8.9
galacticLongitude_deg about 227.2
hemisphereVisibility both hemispheres
IAUApprovedName Sirius
metallicity_FeH about +0.4
orbitalPeriod_years about 50.1
parallax_mas about 379.2
primaryComponent Sirius A
linked to: Sirius
properMotionDec_masPerYear -1223.08
properMotionRA_masPerYear -546.01
radialVelocity_kmPerSec about -5.5
rankByBrightness 1
rightAscension 06h 45m 08.9s
secondaryComponent Sirius B
semiMajorAxis_AU about 20
SiriusA_instanceOf main-sequence star
SiriusA_luminosity_solar about 25
SiriusA_mass_solar about 2.0
SiriusA_radius_solar about 1.7
SiriusA_spectralType A1V
SiriusB_effectiveTemperature_K about 25200
SiriusB_instanceOf white dwarf
SiriusB_mass_solar about 1.0
SiriusB_radius_solar about 0.0084
SiriusB_spectralType DA2
spectralType A1V
systemType binary star system
traditionalNameMeaning scorching
traditionalNameOrigin Greek
visibleFromEarth yes

How these facts were elicited

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Sirius hasHRDesignation HR 2491
HD 48915 catalogDesignation HR 2491