RA 23.4968° · Dec 30.5674° · openngc
8 more points to reach Common.
IC 139 is a trash cluster. It sits in the constellation Tri and shines at apparent magnitude 13.1.
IC 139 is a trash cluster worth 7 points across 1 science badge. Explore its facts, badges and place on the sky map, then add it to your dex on Spacedle.
Look for IC 139 in the constellation Tri. At apparent magnitude 13.1, it takes a larger telescope or a long-exposure image to capture.
Like any astronomical target, IC 139 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.
IC 139 scores 7 points on Spacedle's rarity scale, which places it in the trash tier. Another 8 points would lift it into a rarer tier.
That score comes from 1 science badge — Star cluster — 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.