Messier 57
E457105
Messier 57, also known as the Ring Nebula, is a famous planetary nebula in the constellation Lyra formed from the expelled outer layers of a dying star.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
deep-sky object ⓘ emission nebula ⓘ planetary nebula ⓘ |
| alsoKnownAs |
M57
NERFINISHED
ⓘ
NGC 6720 NERFINISHED ⓘ Ring Nebula NERFINISHED ⓘ |
| angularSize | about 1.4 × 1.0 arcminutes ⓘ |
| apparentMagnitudeV | 8.8 ⓘ |
| bestSeenIn |
medium telescopes
ⓘ
small telescopes ⓘ |
| catalogNumber |
M57
NERFINISHED
ⓘ
NGC 6720 NERFINISHED ⓘ |
| centralStar | white dwarf ⓘ |
| centralStarApparentMagnitude | about 15.8 ⓘ |
| centralStarEffectiveTemperature | about 120,000 K ⓘ |
| declination | +33° 01′ 45″ ⓘ |
| discoveredBy |
Antoine Darquier de Pellepoix
NERFINISHED
ⓘ
Charles Messier NERFINISHED ⓘ |
| discoveryYear | 1779 ⓘ |
| distanceFromEarth |
about 2,300 light-years
ⓘ
about 700 parsecs ⓘ |
| dominantEmissionLine | [O III] ⓘ |
| dominantEmissionLineWavelength | 500.7 nm ⓘ |
| estimatedAge | about 7,000 years ⓘ |
| galacticLatitude | 13.99° ⓘ |
| galacticLongitude | 63.17° ⓘ |
| hasFeature |
bright inner ring
ⓘ
fainter outer halo ⓘ filamentary structures ⓘ |
| locatedIn |
Galactic halo region near the plane
ⓘ
Milky Way ⓘ |
| locatedInConstellation | Lyra NERFINISHED ⓘ |
| morphology | elliptical planetary nebula ⓘ |
| nearTo |
bright star Vega
NERFINISHED
ⓘ
constellation Cygnus border ⓘ |
| nebulaExpansionVelocity | about 20–30 km/s ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ ultraviolet wavelengths ⓘ |
| origin | expelled outer layers of a dying star ⓘ |
| partOf |
Messier catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ |
| progenitorStarMass | about 1.2 solar masses ⓘ |
| rightAscension | 18h 53m 35s ⓘ |
| shape | ring-like ⓘ |
| spectralType | emission-line nebula ⓘ |
| visibleFrom | Northern Hemisphere NERFINISHED ⓘ |
| visibleSeason | northern summer ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.