M45
E18788
M45 is the Pleiades, a prominent open star cluster in the constellation Taurus visible to the naked eye and known since antiquity.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| M 45 | 1 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
deep-sky object ⓘ open star cluster ⓘ |
| age | about 100 million years ⓘ |
| alsoKnownAs |
M45
ⓘ
surface form:
M 45
Messier 45 ⓘ Pleiades ⓘ Seven Sisters ⓘ |
| angularSize | about 110 arcminutes ⓘ |
| apparentMagnitudeV | 1.2 ⓘ |
| bestSeenIn | Northern Hemisphere ⓘ |
| bestSeenSeason |
late autumn
ⓘ
winter ⓘ |
| brightestStar | Alcyone ⓘ |
| brightMembersVisibleToNakedEye | about 6 to 9 ⓘ |
| catalog | Messier catalogue ⓘ |
| catalogCode |
M45
ⓘ
Messier 45 ⓘ |
| containsStar |
Alcyone
ⓘ
Titan ⓘ
surface form:
Atlas
Celaeno ⓘ Electra ⓘ Maia ⓘ Merope ⓘ Pleione ⓘ Taygeta ⓘ |
| culturalSignificance |
important in Greek mythology
ⓘ
important in many world cultures ⓘ |
| declination | +24° 07′ ⓘ |
| discoveredSince | antiquity ⓘ |
| distanceFromEarth |
about 135 parsecs
ⓘ
about 440 light-years ⓘ |
| galacticLocation | in the Orion Arm of the Milky Way ⓘ |
| greekMythologyAssociation |
Seven Sisters
ⓘ
surface form:
the Seven Sisters, daughters of Atlas and Pleione
|
| hasReflectionNebula | yes ⓘ |
| japaneseName | Subaru ⓘ |
| locatedInConstellation | Taurus ⓘ |
| nebulaType | reflection nebula ⓘ |
| numberOfStars | more than 1000 ⓘ |
| observedBy |
Charles Messier
ⓘ
Galileo Galilei ⓘ |
| properMotion | moving together as a bound cluster ⓘ |
| rightAscension | 03h 47m ⓘ |
| spectralTypeDominant | B-type main-sequence stars ⓘ |
| typeOfCluster | young open cluster ⓘ |
| usedFor |
calibration of distance scale
ⓘ
studies of stellar evolution ⓘ |
| visibleToNakedEye | yes ⓘ |
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
M 45