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Collinder 158

Melotte 74, NGC 2439

Proper NameNone
Messier NumberNone
NGC/IC NumberNGC 2439
Other DesignationsCollinder 158, Melotte 74
Right Ascension7h 40m 47s
Declination-31° 41' 38"
Distancec.12,100 light years
c.3,700 parsecs
MagnitudeApparent: +6.90
Absolute: -5.95
DiameterApparent: 9'
Actual: 32 light years
Number of Starsc. 600
Optimum VisibilityJanuary / February

The prominent star in the northeastern quadrant of Collinder 158 is the pulsating hypergiant R Puppis. This star is generally considered to belong to the cluster, rather than simply lying on the same line of sight (though some sources list it only as a 'candidate' member). Imagery provided by Aladin sky atlas


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