Alpha Geminorum
E531022
Alpha Geminorum, also known as Castor, is one of the brightest stars in the constellation Gemini and is actually a complex multiple-star system.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Castor C | 0 |
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
flare star
ⓘ
multiple star system ⓘ |
| alsoKnownAs |
Castor
NERFINISHED
ⓘ
YY Geminorum NERFINISHED ⓘ |
| apparentMagnitudeV | 1.58 ⓘ |
| bayerDesignation | α Geminorum NERFINISHED ⓘ |
| belongsToAsterism | Gemini constellation figure ⓘ |
| component |
Castor A
NERFINISHED
ⓘ
Castor Aa NERFINISHED ⓘ Castor Ab NERFINISHED ⓘ Castor B NERFINISHED ⓘ Castor Ba NERFINISHED ⓘ Castor Bb NERFINISHED ⓘ Castor C NERFINISHED ⓘ Castor Ca NERFINISHED ⓘ Castor Cb NERFINISHED ⓘ |
| constellation | Gemini NERFINISHED ⓘ |
| culturalAssociation | one of the twin stars of Gemini along with Pollux ⓘ |
| declination | +31° 53′ 18″ ⓘ |
| distanceFromEarth_ly | approximately 51 ⓘ |
| distanceFromEarth_pc | approximately 15.6 ⓘ |
| flamsteedDesignation | 66 Geminorum NERFINISHED ⓘ |
| hasVariableComponent | YY Geminorum NERFINISHED ⓘ |
| hemisphereVisibility | northern ⓘ |
| isOneOfBrightestInConstellation | true ⓘ |
| mass_relativeToSun | components range roughly 0.6–2.0 ⓘ |
| numberOfComponents | 6 ⓘ |
| orbitalRelationship |
Castor A and Castor B orbit common barycenter
ⓘ
Castor C orbits Castor AB pair NERFINISHED ⓘ |
| parallax_mas | about 66.9 ⓘ |
| properMotionDec_masPerYr | about −145 ⓘ |
| properMotionRA_masPerYr | about −191 ⓘ |
| radialVelocity_kmPerSec | about +1 ⓘ |
| rightAscension | 07h 34m 36s ⓘ |
| separationFromPollux_deg | about 4.5 ⓘ |
| spectralType |
A1V
ⓘ
A2V ⓘ M-type (for red dwarf components) ⓘ M-type dwarf ⓘ |
| systemConfiguration | hierarchical triple of spectroscopic binaries ⓘ |
| visibleToNakedEye | true ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Castor