Flamsteed designation 21 Tauri
E528148
Flamsteed designation 21 Tauri is a star in the Pleiades open star cluster in the constellation Taurus, traditionally known as Sterope I.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| 21 Tauri | 0 |
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Flamsteed star
ⓘ
Pleiades member ⓘ main-sequence star ⓘ star ⓘ |
| age | about 100 million years ⓘ |
| apparentMagnitudeV | 5.76 ⓘ |
| associatedWith | Seven Sisters asterism NERFINISHED ⓘ |
| belongsTo | Gould Belt region NERFINISHED ⓘ |
| belongsToCluster | M45 NERFINISHED ⓘ |
| catalogDesignation |
BD+23 474
NERFINISHED
ⓘ
Gaia DR3 330235979799822720 NERFINISHED ⓘ HD 23324 NERFINISHED ⓘ HIP 17499 NERFINISHED ⓘ HR 1140 NERFINISHED ⓘ SAO 76199 NERFINISHED ⓘ |
| colorIndexB−V | −0.06 ⓘ |
| componentOf | Pleiades reflection nebula region NERFINISHED ⓘ |
| constellation | Taurus NERFINISHED ⓘ |
| declination | +24° 33′ 17″ ⓘ |
| distanceFromEarth |
about 135 parsecs
ⓘ
about 440 light-years ⓘ |
| effectiveTemperature | about 12000 K ⓘ |
| equatorialCoordinateSystem | ICRS NERFINISHED ⓘ |
| galacticPopulation | Population I star ⓘ |
| hasBayerDesignation | none ⓘ |
| hasCompanion | visual companion ⓘ |
| hasFlamsteedNumber | 21 ⓘ |
| hasTraditionalNameOrigin | Greek mythology ⓘ |
| hemisphere | Northern celestial hemisphere ⓘ |
| isPartOfAsterism | Pleiades NERFINISHED ⓘ |
| locatedIn |
Milky Way
ⓘ
Pleiades open cluster NERFINISHED ⓘ |
| luminosity | about 160 times solar luminosity ⓘ |
| mass | about 3 solar masses ⓘ |
| metallicity | near-solar ⓘ |
| mythologicalAssociation | Sterope, one of the Pleiades sisters NERFINISHED ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| parallax | 7.45 mas ⓘ |
| properMotionDec | −45.50 mas/yr ⓘ |
| properMotionRA | +20.40 mas/yr ⓘ |
| radialVelocity | +6 km/s ⓘ |
| radius | about 3 solar radii ⓘ |
| rightAscension | 03h 45m 54s ⓘ |
| rotationalVelocity | about 140 km/s ⓘ |
| spectralType | B8V ⓘ |
| traditionalName | Sterope I NERFINISHED ⓘ |
| variableStarType | suspected variable ⓘ |
| visibleToNakedEye | yes ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Sterope I