Messier 101
E496369
Messier 101 is a large, face-on spiral galaxy in the constellation Ursa Major, notable for its grand design structure and rich star-forming regions.
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
grand design spiral galaxy
ⓘ
spiral galaxy ⓘ |
| alsoKnownAs |
M101
NERFINISHED
ⓘ
NGC 5457 NERFINISHED ⓘ Pinwheel Galaxy NERFINISHED ⓘ |
| angularSize | 28.8 arcminutes ⓘ |
| apparentMagnitudeV | 7.9 ⓘ |
| bestSeenIn | spring ⓘ |
| catalogNumber |
M101
NERFINISHED
ⓘ
Messier 101 NERFINISHED ⓘ NGC 5457 NERFINISHED ⓘ |
| cataloguedBy | Charles Messier NERFINISHED ⓘ |
| contains |
H II regions
ⓘ
dust lanes ⓘ giant star-forming complexes ⓘ neutral hydrogen gas ⓘ young massive star clusters ⓘ |
| declination | +54° 20′ 57″ ⓘ |
| diameter | about 170000 light-years ⓘ |
| discoveredBy | Pierre Méchain NERFINISHED ⓘ |
| discoveryDate | 1781 ⓘ |
| distanceFromEarth |
about 21 million light-years
ⓘ
about 6.4 megaparsecs ⓘ |
| hasNotableFeature |
asymmetric outer disk
ⓘ
metallicity gradient from center to outskirts ⓘ numerous bright H II regions in spiral arms ⓘ |
| hasProperty |
face-on orientation
ⓘ
grand design spiral structure ⓘ high surface brightness in spiral arms ⓘ rich in star-forming regions ⓘ |
| hasSatelliteGalaxy |
Holmberg IV
NERFINISHED
ⓘ
Holmberg IX NERFINISHED ⓘ NGC 5474 NERFINISHED ⓘ NGC 5477 NERFINISHED ⓘ NGC 5585 NERFINISHED ⓘ |
| locatedIn | M101 Group of galaxies NERFINISHED ⓘ |
| locatedInConstellation | Ursa Major NERFINISHED ⓘ |
| mass | about 1×10^11 solar masses ⓘ |
| memberOf | M101 Group NERFINISHED ⓘ |
| morphologicalType | SAB(rs)cd ⓘ |
| numberOfSpiralArms | multiple prominent spiral arms ⓘ |
| observedBy |
Chandra X-ray Observatory
NERFINISHED
ⓘ
Hubble Space Telescope NERFINISHED ⓘ Spitzer Space Telescope NERFINISHED ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ radio ⓘ ultraviolet ⓘ |
| radialVelocity | 241 km/s ⓘ |
| redshift | 0.000804 ⓘ |
| rightAscension | 14h 03m 12s ⓘ |
| visibleIn | small telescopes ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.