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NGC 7243, Collinder 448, Melotte 240

Proper NameNone
Caldwell NumberC16
NGC/IC NumberNGC 7243
Other DesignationsCollinder 448, Melotte 240
Right Ascension22h 15m 8s
Declination+49° 53' 54"
Distancec.2,800 light years
c.900 parsecs
MagnitudeApparent: +6.4
Absolute: -3.1
DiameterApparent: 29'
Actual: 22 light years
Number of Starsc. 1,300
Optimum VisibilitySeptember (Usually visible from northern latitudes)
NotesThis open cluster lies against the densely starred background of the Milky Way as it passes through the northern parts of Lacerta. The cluster itself is marginally too faint to be seen with the naked eye, and the nearest naked-eye star is blue 4 Lacertae, some 1.5° to the cluster's east.

Imagery provided by Aladin sky atlas

An open star cluster in Lacerta, about 2,800 light years from Earth. It appears to be a fairly young cluster in stellar terms, probably little more than a hundred million years old, and consists of hot blue and white stars.


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