61 Cygni
E579591
61 Cygni is a nearby binary star system in the constellation Cygnus, historically notable as the first star (other than the Sun) to have its distance accurately measured by stellar parallax.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | binary star system ⓘ |
| age_Gyr | about 6 ⓘ |
| apparentMagnitudeV | 5.21 ⓘ |
| catalog |
Gliese Catalogue of Nearby Stars
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ⓘ
Henry Draper Catalogue NERFINISHED ⓘ Hipparcos Catalogue NERFINISHED ⓘ |
| colorIndexB−V | about 1.18 ⓘ |
| component |
61 Cygni A
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ⓘ
61 Cygni B NERFINISHED ⓘ |
| constellation | Cygnus NERFINISHED ⓘ |
| declination_J2000 | +38° 45′ ⓘ |
| distanceFromEarth_ly | about 11.4 ⓘ |
| distanceFromEarth_pc | about 3.5 ⓘ |
| effectiveTemperatureOf61CygniA_K | about 4400 ⓘ |
| effectiveTemperatureOf61CygniB_K | about 4000 ⓘ |
| galacticLatitude_deg | about −5 ⓘ |
| galacticLongitude_deg | about 82 ⓘ |
| galacticPopulation | thin disk ⓘ |
| hasHighProperMotion | true ⓘ |
| hipparcosNumber | 104214/104217 ⓘ |
| luminosityOf61CygniA_solar | about 0.15 ⓘ |
| luminosityOf61CygniB_solar | about 0.08 ⓘ |
| massOf61CygniA_solarMass | about 0.7 ⓘ |
| massOf61CygniB_solarMass | about 0.6 ⓘ |
| metallicity_Fe_H | slightly subsolar ⓘ |
| nearestNeighborStarSystem | about 61 Cygni is among the nearest Sun-like systems ⓘ |
| notableFor | first star after the Sun with distance measured by trigonometric parallax ⓘ |
| orbitalEccentricity | about 0.48 ⓘ |
| orbitalPeriod_years | about 659 ⓘ |
| otherName |
BD+38°4343
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ⓘ
Gliese 820 NERFINISHED ⓘ HR 7703/7704 NERFINISHED ⓘ Struve 2758 NERFINISHED ⓘ |
| parallax_mas | about 286 ⓘ |
| parallaxMeasuredBy | Friedrich Bessel NERFINISHED ⓘ |
| parallaxMeasurementYear | 1838 ⓘ |
| properMotion_Dec_mas_yr | about 3269 ⓘ |
| properMotion_RA_mas_yr | about 4168 ⓘ |
| properMotionRank | one of the highest proper motions among bright stars ⓘ |
| radialVelocity_km_s | about −65 ⓘ |
| rightAscension_J2000 | 21h 06m ⓘ |
| semiMajorAxis_arcsec | about 24.5 ⓘ |
| solarAnalog | often considered a nearby K-dwarf solar neighborhood benchmark ⓘ |
| spectralTypePrimary | K5V ⓘ |
| spectralTypeSecondary | K7V ⓘ |
| variableType | BY Draconis-type variability reported ⓘ |
| visibility | visible to the naked eye under dark skies ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Cygnus