Nunki

E103073

Nunki is a prominent blue-white star in the constellation Sagittarius, known as one of its brightest and most easily recognizable members.

All labels observed (1)

Label Occurrences
Nunki canonical 3

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf astronomicalObject
fixedStar
star
absoluteMagnitudeV ~−2.1
alsoKnownAs Sigma Sagittarii
apparentMagnitudeV 2.05
BayerDesignation Sigma Sagittarii
surface form: σ Sagittarii
BayerLetter Sigma
belongsToAsterism Teapot
canBeObservedFrom bothHemispheres
color blue-white
constellation Sagittarius
declination −26°18′
distanceFromEarth_ly ~220
distanceFromEarth_pc ~67
effectiveTemperature_K ~22000
equatorialCoordinateSystem International Celestial Reference System
surface form: ICRS
evolutionaryStage hydrogen-burningMainSequence
FlamsteedDesignation Lambda Sagittarii
surface form: 34 Sagittarii
galacticPopulation thinDisk
hasColorIndexBminusV ~−0.23
hasTraditionalName Nunki self-link
hasUminusBColorIndex ~−0.88
IAUConstellation Sagittarius
isBrightestStarInConstellation Sagittarius
isCataloguedIn Henry Draper Catalogue
surface form: HenryDraperCatalogue

Hipparcos satellite
surface form: HipparcosCatalogue
isEasilyVisibleToNakedEye true
isHotterThanSun true
isIAUApprovedStarName true
isMainSequenceStar true
isMoreLuminousThanSun true
isMoreMassiveThanSun true
isNavigationStar true
isOneOfBrightestStarsIn Sagittarius
isProminentStarOf Sagittarius
isReferenceStarFor celestialNavigation
luminosity_solarLuminosities ~3300
mass_solarMasses ~5.0
metallicity_FeH nearSolar
parallax_mas ~15
properMotionDec_masPerYear ~−51
properMotionRA_masPerYear ~14
radius_solarRadii ~4.5
rightAscension 18h55m
rotationalVelocity_kmPerSec ~165
spectralClass B2.5V
traditionalNameOrigin Babylonian

How these facts were elicited

Referenced by (3)

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

Sagittarius brightStar Nunki
the Teapot hasPart Nunki
Nunki hasTraditionalName Nunki self-link