Ring Nebula
E461994
The Ring Nebula is a famous planetary nebula in the constellation Lyra, known for its bright, ring-shaped shell of ionized gas surrounding a hot central white dwarf.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
deep-sky object ⓘ emission nebula ⓘ planetary nebula ⓘ |
| age | on the order of several thousand years ⓘ |
| alsoKnownAs |
M57
NERFINISHED
ⓘ
Messier 57 NERFINISHED ⓘ NGC 6720 NERFINISHED ⓘ |
| angularSize | about 1.4 × 1.0 arcminutes ⓘ |
| apparentMagnitudeV | 8.8 ⓘ |
| bestSeenIn | summer sky of the Northern Hemisphere ⓘ |
| catalog |
Messier catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ |
| centralStarApparentMagnitude | about 15.8 ⓘ |
| centralStarEffectiveTemperature | about 100,000 K ⓘ |
| declination | +33° 01′ 45″ ⓘ |
| discoveredBy | Antoine Darquier de Pellepoix NERFINISHED ⓘ |
| discoveryYear | 1779 ⓘ |
| distanceFromEarth |
about 2,300 light-years
ⓘ
about 700 parsecs ⓘ |
| dominantEmissionLines |
H-alpha
ⓘ
He II ⓘ [O III] NERFINISHED ⓘ |
| hasCentralStar | white dwarf ⓘ |
| hasHalo | faint outer halo of gas ⓘ |
| hasMorphology | elliptical planetary nebula ⓘ |
| imagedBy |
Hubble Space Telescope
NERFINISHED
ⓘ
James Webb Space Telescope NERFINISHED ⓘ |
| ionizationSource | ultraviolet radiation from central white dwarf ⓘ |
| locatedIn |
Galactic halo
ⓘ
Milky Way ⓘ |
| locatedInConstellation | Lyra NERFINISHED ⓘ |
| messierNumber | M57 NERFINISHED ⓘ |
| nearbyObject |
Sheliak (Beta Lyrae)
NERFINISHED
ⓘ
Sulafat (Gamma Lyrae) NERFINISHED ⓘ |
| nebulaExpansionVelocity | about 20–30 km/s ⓘ |
| ngcNumber | NGC 6720 NERFINISHED ⓘ |
| observableWith | small telescope ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ ultraviolet wavelengths ⓘ |
| origin | ejected outer layers of a dying star ⓘ |
| partOf | Lyra constellation region near Vega ⓘ |
| physicalDiameter | about 1 light-year ⓘ |
| progenitorStarMass | about 1.2 solar masses ⓘ |
| rightAscension | 18h 53m 35.1s ⓘ |
| shape | ring-like shell ⓘ |
| spectralTypeOfCentralStar | DAO white dwarf ⓘ |
| structure | ionized gas shell ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.