M17
E465450
M17 is a bright, massive star-forming region and open star cluster embedded in the Omega (Swan) Nebula in the constellation Sagittarius.
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
Messier object ⓘ NGC object ⓘ emission nebula ⓘ open star cluster ⓘ star-forming region ⓘ |
| addedToMessierCatalogueBy | Charles Messier NERFINISHED ⓘ |
| angularSize | 11 arcminutes × 6 arcminutes ⓘ |
| apparentMagnitudeV | 6.0 ⓘ |
| contains |
dust lanes
ⓘ
massive young stars ⓘ molecular clouds ⓘ open star cluster NGC 6618 NERFINISHED ⓘ |
| declination | −16° 11′ ⓘ |
| discoveredBy | Philippe Loys de Chéseaux NERFINISHED ⓘ |
| discoveryYear | 1745 ⓘ |
| distanceFromEarth |
about 1.6 kiloparsecs
ⓘ
about 5000 light-years ⓘ |
| dominantEmission | H-alpha ⓘ |
| galacticLatitude | about −0.7 degrees ⓘ |
| galacticLongitude | about 15.1 degrees ⓘ |
| hasAlternativeName |
Checkmark Nebula
NERFINISHED
ⓘ
Horseshoe Nebula NERFINISHED ⓘ Omega Nebula NERFINISHED ⓘ Swan Nebula NERFINISHED ⓘ |
| hasCatalogueNumber |
M17
ⓘ
Messier 17 NERFINISHED ⓘ NGC 6618 NERFINISHED ⓘ |
| hasColor | reddish ⓘ |
| hasFeature | bright ionization front ⓘ |
| hasPhysicalProcess |
ionization of hydrogen gas
ⓘ
massive star formation ⓘ |
| hasShape |
omega-shaped
ⓘ
swan-like ⓘ |
| isPartOf | Sagittarius Star Cloud region NERFINISHED ⓘ |
| isPopularTargetFor |
amateur astronomers
ⓘ
astrophotography ⓘ |
| locatedIn |
Milky Way
ⓘ
Sagittarius Arm of the Milky Way NERFINISHED ⓘ |
| locatedInConstellation | Sagittarius NERFINISHED ⓘ |
| messierCatalogueEntryYear | 1764 ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ radio ⓘ |
| rightAscension | 18h 20m ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.