Messier 81
E450569
Messier 81 is a prominent, nearby grand-design spiral galaxy in the constellation Ursa Major, notable for its brightness and well-defined structure.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
NGC object ⓘ extragalactic object ⓘ grand-design spiral galaxy ⓘ spiral galaxy ⓘ |
| absoluteMagnitude_V | about -20.8 ⓘ |
| AGNType | low-luminosity Seyfert 1 ⓘ |
| angularSize_arcmin | about 26.9 × 14.1 ⓘ |
| apparentMagnitude_V | about 6.9 ⓘ |
| bestSeenFrom | Northern Hemisphere NERFINISHED ⓘ |
| cataloguedBy | Charles Messier NERFINISHED ⓘ |
| centralBlackHoleMass_solar | about 7e7 ⓘ |
| companionGalaxy |
Messier 82
NERFINISHED
ⓘ
NGC 3077 NERFINISHED ⓘ |
| constellation | Ursa Major NERFINISHED ⓘ |
| declination_J2000 | +69°03′55″ ⓘ |
| diameter_ly | about 90000 ⓘ |
| discoveredBy | Johann Elert Bode NERFINISHED ⓘ |
| discoveryYear | 1774 ⓘ |
| distanceFromEarth_ly | about 12000000 ⓘ |
| distanceFromEarth_Mpc | about 3.6 ⓘ |
| groupMembership | M81 Group NERFINISHED ⓘ |
| hasCentralSupermassiveBlackHole | true ⓘ |
| hostTo | numerous H II regions ⓘ |
| inclination_degrees | about 59 ⓘ |
| interaction |
tidal interaction with Messier 82
ⓘ
tidal interaction with NGC 3077 ⓘ |
| luminosity_solar | about 2.5e10 ⓘ |
| mass_solar | about 7e11 ⓘ |
| messierNumber | 81 ⓘ |
| morphologicalType | SA(s)ab ⓘ |
| nearestMajorGalaxy | Milky Way NERFINISHED ⓘ |
| ngcNumber | 3031 ⓘ |
| notableFeature |
bright bulge
ⓘ
low-level active galactic nucleus ⓘ prominent dust lanes ⓘ well-defined spiral arms ⓘ |
| otherName |
Bode's Galaxy
NERFINISHED
ⓘ
M81 NERFINISHED ⓘ NGC 3031 NERFINISHED ⓘ |
| positionAngle_degrees | about 157 ⓘ |
| radialVelocity_km_per_s | about -34 ⓘ |
| redshift_z | about 0.000113 ⓘ |
| rightAscension_J2000 | 09h55m33.2s ⓘ |
| stellarMass_solar | about 1e11 ⓘ |
| supernovaDiscoveryYear | 1993 ⓘ |
| supernovaRecorded | SN 1993J NERFINISHED ⓘ |
| supernovaType | Type IIb (SN 1993J) NERFINISHED ⓘ |
| visibility | visible in small amateur telescopes ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.