RA 10.5287° · Dec -61.3648° · star
12 more points to reach Rare.
HD 4039 is an uncommon star. It sits in the constellation Tuc, shines at apparent magnitude 8.52 and has spectral type M0III.
Its spectrum reads M0III — an M-type red star — and M stars are the silent majority: roughly three of every four stars in the galaxy are one.
Look for HD 4039 in the constellation Tuc. At apparent magnitude 8.52, it is an easy target for binoculars.
Like any astronomical target, HD 4039 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.
HD 4039 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 4 science badges — Star, Cool red M-type star, Giant star and Deep red star — 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.