RA 116.3125° · Dec -37.9674° · openngc
12 more points to reach Rare.
NGC 2451 is an uncommon cluster. It lies about 631.7 light-years from Earth, sits in the constellation Pup and shines at apparent magnitude 9.5.
An open cluster: a few hundred stars born together out of one collapsing cloud, still drifting along in loose formation.
Look for NGC 2451 in the constellation Pup. At apparent magnitude 9.5, a small backyard telescope will bring it into view.
Like any astronomical target, NGC 2451 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.
NGC 2451 scores 22 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 12 points would lift it into a rarer tier.
That score comes from 3 science badges — Star cluster, Open cluster and Bigger on the sky than the full Moon — 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.