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Proper NameLambda Orionis Cluster
Messier NumberNone
NGC/IC NumberNone
Other DesignationsCollinder 69
ConstellationOrion
Right Ascension5h 35m 10s
Declination+9° 48' 47"
Distancec. 1,300 light years
c. 399 parsecs
MagnitudeApparent: +2.79
Absolute: -5.22
DiameterApparent: 1° 70'
Actual: 27 light years
Number of Starsc. 1,100
Optimum VisibilityDecember / January
NotesA young cluster of more than a thousand blue-coloured stars at a distance of some 1,300 light years from the Sun. The Lambda Orionis Cluster marks the 'head' of Orion, lying northwestward of Betelgeuse and northeastward of Bellatrix as seen from Earth (though in fact it lies far beyond these two prominent stars).

The stars that form Orion's 'head' are part of an open star cluster identified as the Lambda Orionis Cluster, Collinder 69. The brightest of these is Meissa (also known as Heka), but the cluster contains numerous other stars in addition. The cluster seems to be relatively young, in astronomical terms, and probably formed no more than ten million years ago. Remnants of the nebulous material from which it formed can still be seen between the cluster's stars.

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