23 Tauri (star traditionally named Merope)

E26561

B-type star Pleiades star star subgiant star

23 Tauri, traditionally named Merope, is a blue-white B-type subgiant star in the Pleiades open star cluster in the constellation Taurus.

Predicate	Object
instanceOf	B-type star → Pleiades star → star → subgiant star →
age_Myr	about 100 →
apparentMagnitudeV	4.14 →
associatedNebula	Merope Nebula →
bayerDesignation	23 Tauri →
belongsToAsterism	Pleiades →
bestViewingSeason	northern winter →
color	blue-white →
constellation	Taurus →
declination	+23° 56′ 54″ →
distanceFromEarth_ly	about 440 light-years →
distanceFromEarth_pc	about 135 parsecs →
dominantFusionProcess	hydrogen fusion in core →
effectiveTemperature_K	about 14000 →
epoch	J2000 →
evolutionaryStage	subgiant leaving main sequence →
flamsteedDesignation	23 Tauri →
galacticPopulation	thin disk →
hasCatalogDesignation	HD 23480 → HIP 17608 → HR 1156 → SAO 76199 →
hasProperMotion	yes →
hasSurroundingReflectionNebula	yes →
hemisphereVisibility	northern hemisphere →
locatedIn	Milky Way → Orion Arm →
luminosity_solar	about 630 →
mass_solar	about 4.5 →
memberOf	Pleiades open cluster →
metallicity_Fe_H	near solar →
observedIn	infrared band → optical band → ultraviolet band →
parallax_mas	about 7.4 →
properMotionDec_mas_yr	-45 (approx) →
properMotionRA_mas_yr	+20 (approx) →
radialVelocity_km_s	about +7 →
radius_solar	about 4.0 →
rightAscension	03h 46m 19s →
rotationalVelocity_km_s	about 220 →
spectralType	B6IV →
traditionalName	Merope →
variable	no →
visibleToNakedEye	yes →

Subject (surface form when different)	Predicate
Merope →	cataloguedAsStar