RA 265.0865° · Dec -32.2542° · openngc
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4 more points to reach Anomaly.
Butterfly Cluster is an epic cluster. It lies about 1,508.2 light-years from Earth, sits in the constellation Sco and shines at apparent magnitude 4.2.
An open cluster: a few hundred stars born together out of one collapsing cloud, still drifting along in loose formation.
Look for Butterfly Cluster in the constellation Sco. At apparent magnitude 4.2, it can be glimpsed with the unaided eye under dark skies.
Like any astronomical target, Butterfly Cluster is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.
Butterfly Cluster scores 74 points on Spacedle's rarity scale, which places it in the epic tier. Another 4 points would lift it into a rarer tier.
That score comes from 10 science badges — Star cluster, Distant (over 1,000 light-years), Messier object, Bright deep-sky object, Has a proper name, Open cluster, On the zodiac and Big on the sky — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.