59 Cygni as a spectroscopic binary
E572871
B‑type main‑sequence star
binary star
spectroscopic binary star system
stellar companion
stellar system
59 Cygni as a spectroscopic binary is a stellar system in the constellation Cygnus whose binary nature is revealed through periodic Doppler shifts in its spectral lines rather than direct visual separation.
Observed surface forms (3)
| Surface form | Occurrences |
|---|---|
| 59 Cygni | 0 |
| 59 Cygni A | 0 |
| 59 Cygni B | 0 |
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
B‑type main‑sequence star
ⓘ
binary star ⓘ spectroscopic binary star system ⓘ stellar companion ⓘ stellar system ⓘ |
| apparentMagnitudeV | about 4.7 ⓘ |
| binaryDetectionMethod | spectroscopic ⓘ |
| binaryNatureRevealedBy | periodic Doppler shifts in spectral lines ⓘ |
| binaryOrbitalPeriod | on the order of a few tens of days ⓘ |
| binarySeparationDetection | not visually resolved ⓘ |
| binaryType |
SB1
ⓘ
single‑lined spectroscopic binary ⓘ |
| catalogDesignation |
BD+46 3137
NERFINISHED
ⓘ
HD 200120 NERFINISHED ⓘ HIP 103632 NERFINISHED ⓘ HR 7950 NERFINISHED ⓘ |
| colorIndexBminusV | about −0.18 ⓘ |
| constellation | Cygnus NERFINISHED ⓘ |
| declination | about +47° ⓘ |
| detectionMethod | spectroscopic ⓘ |
| distanceFromEarth |
approximately 250 parsecs
ⓘ
approximately 800 light‑years ⓘ |
| evolutionaryStatus | main‑sequence ⓘ |
| galacticPopulation | young Population I star ⓘ |
| hasDopplerShift | periodic shifts in spectral lines due to orbital motion ⓘ |
| hasFeature |
circumstellar disk around primary
ⓘ
emission lines in spectrum ⓘ |
| hasProperty |
Be‑star emission
ⓘ
rapid rotation ⓘ |
| hasRadialVelocityCurve | yes ⓘ |
| locatedIn |
Galactic disk
ⓘ
Milky Way ⓘ |
| massFunction | derived from radial‑velocity curve ⓘ |
| notResolvedBy | direct imaging in typical optical telescopes ⓘ |
| observationalTechnique | high‑resolution spectroscopy ⓘ |
| orbitalMotionEvidence | periodic line‑of‑sight velocity shifts ⓘ |
| primaryComponent | 59 Cygni A NERFINISHED ⓘ |
| radialVelocityVariation | periodic ⓘ |
| rightAscension | about 20h 16m ⓘ |
| secondaryComponent | 59 Cygni B NERFINISHED ⓘ |
| spectralClass | B1.5V ⓘ |
| spectralClassPrimary | B1.5V ⓘ |
| usedToStudy |
Be‑star disks in binary systems
ⓘ
mass transfer and interaction in close binaries ⓘ |
| variableStarType | Be star ⓘ |
| visibility | visible to the naked eye under good conditions ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.