Messier 77
E591822
Messier 77 is a bright barred spiral galaxy and active galactic nucleus located in the constellation Cetus, known as one of the nearest and most studied Seyfert galaxies.
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
Seyfert galaxy
ⓘ
barred spiral galaxy ⓘ |
| activityType | Seyfert type II nucleus ⓘ |
| alsoKnownAs |
Arp 37
NERFINISHED
ⓘ
M77 NERFINISHED ⓘ NGC 1068 NERFINISHED ⓘ |
| apparentMagnitudeV | 8.9 ⓘ |
| arpNumber | 37 ⓘ |
| bestSeenIn | autumn months from northern hemisphere ⓘ |
| cataloguedBy | Charles Messier NERFINISHED ⓘ |
| constellation | Cetus NERFINISHED ⓘ |
| declination | −00° 00′ 48″ ⓘ |
| diameter | about 170000 light-years ⓘ |
| discoverer | Pierre Méchain NERFINISHED ⓘ |
| discoveryDate | 1780 ⓘ |
| distanceFromEarth |
about 14.4 megaparsecs
ⓘ
about 47 million light-years ⓘ |
| galaxyType | barred spiral galaxy ⓘ |
| hasClassification | radio-quiet AGN ⓘ |
| hasDustStructure | circumnuclear dust torus ⓘ |
| hasFeature |
bright active nucleus
ⓘ
prominent central bar ⓘ strong emission lines in spectrum ⓘ well-defined spiral arms ⓘ |
| hasStarFormation | enhanced circumnuclear starburst region ⓘ |
| hostGalaxyOf | supermassive black hole ⓘ |
| isOneOf |
best-studied active galactic nuclei
ⓘ
nearest Seyfert galaxies ⓘ |
| isTargetFor |
amateur astronomers
ⓘ
professional observatories ⓘ |
| locatedIn | local universe ⓘ |
| messierNumber | 77 ⓘ |
| morphologicalType | (R)SA(rs)b ⓘ |
| ngcNumber | 1068 ⓘ |
| observedIn |
X-ray wavelengths
ⓘ
infrared wavelengths ⓘ optical wavelengths ⓘ radio wavelengths ⓘ |
| partOf | Cetus constellation region NERFINISHED ⓘ |
| radialVelocity | 1137 km/s ⓘ |
| redshift | 0.003793 ⓘ |
| rightAscension | 02h 42m 40.7s ⓘ |
| supermassiveBlackHoleMass | about 10 million solar masses ⓘ |
| visibleIn | small telescopes ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.