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.

All labels observed (3)

Label Occurrences
61 Cygni canonical 3
61 Cygni A 2
61 Cygni B 2

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf binary star system ⓘ
age_Gyr about 6 ⓘ
apparentMagnitudeV 5.21 ⓘ
catalog Gliese Catalogue of Nearby Stars ⓘ
Henry Draper Catalogue ⓘ
Hipparcos Catalogue ⓘ
colorIndexB−V about 1.18 ⓘ
component 61 Cygni A ⓘ
linked to: 61 Cygni

61 Cygni B ⓘ
linked to: 61 Cygni
constellation Cygnus ⓘ
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 ⓘ
Gliese 820 ⓘ
HR 7703/7704 ⓘ
Struve 2758 ⓘ
parallax_mas about 286 ⓘ
parallaxMeasuredBy Friedrich Bessel ⓘ
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 ⓘ

How these facts were elicited

Referenced by (7)

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

Cygnus → containsStar → 61 Cygni ⓘ
subject linked to: constellation Cygnus
stellar parallax of 61 Cygni → appliesTo → 61 Cygni A ⓘ
linked to: 61 Cygni
stellar parallax of 61 Cygni → appliesTo → 61 Cygni B ⓘ
linked to: 61 Cygni
61 Cygni → component → 61 Cygni A ⓘ
linked to: 61 Cygni
61 Cygni → component → 61 Cygni B ⓘ
linked to: 61 Cygni